Lasiurus borealis, or red bats, are widely distributed in forested regions, occurring from southern Canada through Central America and into Chile and Argentina. Red bats migrate to warmer regions during winter.
Biogeographic Regions: nearctic (Native ); neotropical (Native )
Red bats are secure over most of their range and are not considered threatened.
Temperate North American bats are now threatened by a fungal disease called “white-nose syndrome.” This disease has devastated eastern North American bat populations at hibernation sites since 2007. The fungus, Geomyces destructans, grows best in cold, humid conditions that are typical of many bat hibernacula. The fungus grows on, and in some cases invades, the bodies of hibernating bats and seems to result in disturbance from hibernation, causing a debilitating loss of important metabolic resources and mass deaths. Mortality rates at some hibernation sites have been as high as 90%. While there are currently no reports of Lasiurus borealis mortalities as a result of white-nose syndrome, the disease continues to expand its range in North America.
US Federal List: no special status
CITES: no special status
State of Michigan List: no special status
IUCN Red List of Threatened Species: least concern
Red bats use echolocation to locate prey. They use both broadband and narrow band calls. Search phases of calls use long calls with low pulse repetition of narrow band frequencies.
Perception Channels: tactile ; acoustic ; echolocation ; chemical
Unfortunately some people view red bats, along with all other bats, as vermin. However, red bats do not negatively affect humans.
Red bats rarely invade homes. Red bats keep insect populations down.
Positive Impacts: controls pest population
Red bats play an important ecosystem role as insect consumers.
Red bats are insectivorous. They capture insects while flying like many other insectivorous bats.
Red bats have been found in insect light traps. The activity of these bats around lights reflects overall flight and feeding patterns. Hunting for food begins at dusk and the bat proceeds to hunt within 500 m of a light source (Hickey et al 1996). Foraging activies of this bat are generally concentrated into one feeding bout, but there are records of these bats foraging throughout the night. Their food consists of different kinds of insects: moths, beetles, plant-hoppers, ants, flies, and others.
Red bats make one pass through a concentration of potential prey, fixing on a target within 5 to 10 m. They attack insects, on average, every thirty seconds and are successful fourty percent of the time. If a bat is stalking a moth using echolocation the moth can hear this and will try to flee the attack by diving. The bat will follow the moth into a steep dive and often will pull away within inches of the ground. Humans observing this predator-prey interaction only see the bat and not the fleeing moth and may believe that the bat is acting aggressively towards them.
There is a distinct body and head posturing change in this bat when in pursuit of prey. It has been said that if you observe a rural street light and see a bat dipping and diving, that you are most likely viewing a red bat.
Animal Foods: insects
Primary Diet: carnivore (Insectivore )
Lasiurus borealis are fast flying bats that live throughout the Americas. They tend to choose habitats that are sparsely to moderately populated by humans and are rare in heavily urbanized areas.
Habitat Regions: temperate ; tropical
Terrestrial Biomes: forest
Red bats are medium sized bats having a total length of 93 to 117 mm. Body length is approximately 40 to 50 mm and weight ranges between 7 to 13 g. The hindfoot length is 6 to 11 mm. Height of the ear from the notch is 8 to 13 mm. Length of the forearm varies between 36 and 46 mm.
Pelage varies in color from a brick red to a yellowish red. The fur is white at the tips giving these bats a frosted appearance. In general, female bats appear more frosted compared to males, and males have a redder color than females. There is no documented sexual dimorphism in size. The uropatagium is thickly furred on the dorsal side and helps to keep these bats warm in cold weather.
Lasiurus borealis have small and heavily constructed skulls. The arrangement of the 32 teeth is distinctive and shared with other Lasiurus species. Red bats have a tiny cone shaped upper premolar that is located at the inner junction of the upper canine and the second premolar.
Red bats have been called by Allen Kurta, author of "Mammals of the Great Lakes," one of the "most handsome mammals in the Great Lakes region."
Range mass: 7 to 13 g.
Range length: 93 to 117 mm.
Sexual Dimorphism: sexes colored or patterned differently
Other Physical Features: endothermic ; bilateral symmetry
Predators of red bats include birds of prey and opossums. Humans and human constructions have also taken their toll on red bats. "There have been documented cases of these bats being impaled by barbed wire, . . . entrapped on road surface oil . . ., flying into lighthouses . . ., and radiator grills of automobiles . . ." (Baker, 1983, pg. 123).
Red bats avoid predators through the use of camouflage.
Known Predators:
Anti-predator Adaptations: cryptic
An incomplete account of a red bat mating in flight was made in 1947. A bat biologist was fly fishing and watched as he saw what looked like a single bat tumble onto the bank. The biologist inspected with his flashlight, and saw what he originally thought was a female bat with young clinging to her. Under closer inspection the biologist saw that a male had clasped itself to the back of the female therefore making it impossible for either to fly. It seemed as if the male red bat had attached itself to the female in mid-flight. The male bat seemed to hold his position by hooking his claw over the female's wing.
Mating takes place in flight and copulation usually occurs in August or September. The sperm is stored until the spring, usually March or April. Female red bats possess four mammary glands while most other chiropterans have two. Female red bats give birth to one litter of twins each year, unlike most bats which give birth to single young. Newborn bats are hairless and weigh approximately 1.5 g. The young learn to fly at about five weeks old.
Breeding interval: Red bats breed once each year.
Breeding season: Mating occurs in August or September.
Range number of offspring: 1 to 4.
Average number of offspring: 2.
Range gestation period: 80 to 90 days.
Average weaning age: 38 days.
Average time to independence: 5 weeks.
Key Reproductive Features: iteroparous ; seasonal breeding ; gonochoric/gonochoristic/dioecious (sexes separate); sexual ; viviparous ; sperm-storing ; delayed fertilization
Like all mammals, female red bats nurse their young until the young are able to fend for themselves. It takes young red bats about five weeks to learn how to fly and forage on their own.
Parental Investment: pre-fertilization (Protecting: Female); pre-hatching/birth (Provisioning: Female, Protecting: Female); pre-weaning/fledging (Provisioning: Female, Protecting: Female); pre-independence (Provisioning: Female, Protecting: Female)
Lasiurus borealis és una espècie de ratpenat insectívora dins la família Vespertilionidae. Està relacionat amb Lasiurus blossevillii.
Lasiurus borealis es distribueix per l'est de Nord-amèrica, amb registres ocasionals a Bermuda i les Bahames.
Lasiurus borealis és una espècie de ratpenat insectívora dins la família Vespertilionidae. Està relacionat amb Lasiurus blossevillii.
Lasiurus borealis es distribueix per l'est de Nord-amèrica, amb registres ocasionals a Bermuda i les Bahames.
Die Rote Fledermaus (Lasiurus borealis) ist eine Fledermausart aus der Familie der Glattnasen (Vespertilionidae), die in Nordamerika beheimatet ist.
Der Gattungsname Lasiurus ist griechisch und bedeutet „behaarter Schwanz“. Der Artname borealis ist lateinisch und bedeutet „nördlich“.
Die Rote Fledermaus hat eine unverwechselbare ziegel- bis rostrote Fellfarbe mit zwei weißen Flecken an den Schultern. Die Haare sind mit 5,8 mm ungewöhnlich lang und weisen eine weiße Spitze auf. Die Unterseite ist leicht blasser als der Rücken. Die Schwanzflughaut ist stark behaart. Die Ohren sind breit und rund, und ragen nach vorne gelegt bis zur Hälfte über die Schnauze. Der Calcar ist doppelt so lang wie der Fuß. Die Flügel sind relativ lang und schmal, was die Rote Fledermaus zu einem schnellen aber wenig wendigen Flieger macht. Die Gesamtlänge der Roten Fledermaus beträgt im Schnitt 108,9 mm mit einer Unterarmlänge von 40,6 mm und einem Gesamtgewicht von 7 bis 13 g. Die Weibchen sind dabei etwas größer als die Männchen.
Die Rote Fledermaus ist wie die meisten Fledermäuse nachtaktiv und beginnt 1–2 Stunden nach Sonnenuntergang mit der Futtersuche. Dabei fliegt sie meist in offenem Gelände oder oberhalb der Baumkrone. Sie ernährt sich von fliegenden Insekten wie Nachtfalter, Zweiflügler, Hautflügler und Gleichflügler, erbeutet jedoch auch Insekten, die am Boden leben, wie Zikaden, Käfer und Grillen.
Rote Fledermäuse sind in der Regel Einzelgänger, die tagsüber in Bäumen und Sträucher in 1,1–6,2 m Höhe über dem Boden hängen. Es finden sich aber manchmal auch Gruppen von bis zu fünf Tieren unter einem einzigen Blatt, obwohl andere geeignete Hangplätze vorhanden wären. Dabei liegen die Hangplätze immer im Schatten, sind von den Seiten her geschützt und oft nur im unteren Bereich offen.
Die Rote Fledermaus gehören zu den im Winter und Frühjahr migrierenden Fledermausarten, wobei die sonst solitären Tiere in Gruppen ziehen und jagen. Manche Tiere verbleiben aber in den nördlicheren Regionen und verbringen den Winter im Winterschlaf in großen Gruppen in gut geschützten Höhlen. Auch außerhalb des Winterschlafs können die Tiere ab Temperaturen unter 20 °C in Torpor gehen und dabei ihre Herzrate auf weniger als 16 Schläge pro Minute absenken.
Zu den bekannten Fressfeinden gehören Opossums, Hauskatzen, Buntfalken, Merline, Virginia-Uhus und Rennkuckucke. In den östlichen Vereinigten Staaten ist der Blauhäher wahrscheinlich der wichtigste Fressfeind, der es besonders auf die Jungtiere abgesehen hat.
Wie bei vielen anderen Fledermausarten der gemäßigten Breiten findet die Paarung der Roten Fledermaus im Herbst statt. Die Weibchen lagern die Spermien durch den Winter hindurch in ihren Geschlechtsorganen. Der Eisprung findet im April und Mai statt, wonach die Eizelle mit den gelagerten Spermien befruchtet wird. Nach einer Tragezeit von 80 bis 90 Tagen gebären die Weibchen 1–5 nackte haarlose Jungtiere mit einem durchschnittlichen Gewicht von lediglich 0,5 g. Die durchschnittliche Wurfgröße von je nach Gebiet 2,3–3,2 Jungen ist ungewöhnlich hoch für Fledermäuse. Die Jungtiere hängen sich nach der Geburt mit den Zähnen und Daumenkrallen, sowie mit den Füßen an das Fell der Mutter, werden jedoch während der Futtersuche vom Muttertier im Hangplatz zurückgelassen. Nach 3–4 Wochen öffnen die Jungtiere die Augen. Das Fell ist zu diesem Zeitpunkt noch kurz, jedoch schon relativ dicht, und die Jungen wiegen jetzt 4–5 g. Ältere Jungtiere hängen tagsüber in unmittelbarer Nähe zur Mutter und werden insgesamt bis zu einem Alter von 6 Wochen gesäugt. Erste Flugversuche werden im Alter von 3 Wochen unternommen, wobei die Jungen nach 6 Wochen selbständig sind.
Die Rote Fledermaus kommt in den Vereinigten Staaten östlich der Rocky Mountains bis zum Norden Mexikos vor. Auf den Bermudas ist die Art ausgestorben. Die IUCN schätzt die Art dank ihrer weiten Verbreitung und ihres Vorkommens in geschützten Gebieten als ungefährdet ein.[1]
Die Rote Fledermaus (Lasiurus borealis) ist eine Fledermausart aus der Familie der Glattnasen (Vespertilionidae), die in Nordamerika beheimatet ist.
Der Gattungsname Lasiurus ist griechisch und bedeutet „behaarter Schwanz“. Der Artname borealis ist lateinisch und bedeutet „nördlich“.
The eastern red bat (Lasiurus borealis) is a species of microbat in the family Vespertilionidae. Eastern red bats are widespread across eastern North America, with additional records in Bermuda.
L. borealis
Relationship of L. borealis within Lasiurus, based on an analysis of nuclear and mitochondrial DNA.[2]It was described in 1776 by German zoologist Philipp Ludwig Statius Müller. He initially placed it in the genus Vespertilio,[a] with the name Vespertilio borealis.[4] It was not placed into its current genus Lasiurus until the creation of the genus in 1831 by John Edward Gray.[5] The generic name "Lasiurus" is derived from the Greek lasios ("hairy") and oura ("tail"); its species name "borealis" is Latin in origin, meaning "northern."[6][7] Of the species in its genus, the eastern red bat is most closely related to other red bats, with which they form a monophyly. Its closest relatives are the Pfeiffer's red bat (Lasiurus pfeifferi), Seminole bat (L. seminolus), cinnamon red bat (L. varius), desert red bat (L. blossevillii), saline red bat (L. salinae), and the greater red bat (L. atratus).[8]
The eastern red bat has distinctive fur, with males being brick or rusty red, and females being a slightly more frosted shade of red.[9][10] Both male and female eastern red bats have distinctive shoulder patches of white fur.[10] Individual hairs on its back are approximately 5.8 mm (0.23 in), while hairs on its uropatagium are 2.6 mm (0.10 in) long. Fur on its ventral surface is usually lighter in color. Its entire body is densely furred, including its uropatagium. It is a medium-sized member of its genus, weighing 7–13 g (0.25–0.46 oz) and measuring 109 mm (4.3 in) from head to tail. Its ears are short and rounded, with triangular tragi. Its wings are long and pointed. Its tail is long, at 52.7 mm (2.07 in) long. Its forearm is approximately 40.6 mm (1.60 in) long. Its dental formula is 1.1.2.33.1.2.3, for a total of 32 teeth.[5]
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Female eastern red bat, roosting in a tree
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In 1874 art
The aspect ratio and wing loading of eastern red bat wings indicates that they fly relatively quickly and are moderately maneuverable.[5] Eastern red bats are insectivorous, preying heavily on moths, with other insect taxa also consumed. They consume known pests, including gypsy moths, tent caterpillar moths, Cydia moths, Acrobasis moths, cutworm moths, and coneworm moths.[11]
Eastern red bat breeding season starts in the autumn,[12] and multiple males can sire a single litter.[13] Pups are born in the summer,[12] usually sometime between May and July.[14] Unlike other bats species who usually produce one pup, eastern red bats have on average three pups at a time, and some eastern red bats have given birth to as many as five pups.[15] Females have four nipples, which allows them to nourish multiple offspring at once. Eastern red bat pups learn to fly about a month after being born, after which they are weaned.[12] Even after the pups have learned how to fly, they remain with their mother for a while before roosting on their own.[14]
Eastern red bats are often attacked and killed by hawks and owls, or aggressive species like blue jays and crows; the former animal in particular serves as a major predator for bats hiding in leaf piles. Eastern red bats are also killed by flying into cars, tall human-made structures, or wind turbines. Allen Kurta argues that the lifespan for an eastern red bat is about two years, although they can probably live even longer.[15]
The eastern red bat is widely distributed in eastern North America and Bermuda.[16] It generally occurs east of the Continental Divide, including southern Canada and northeastern Mexico. In the winter, it occurs in the southeastern United States and northeastern Mexico, with greatest concentrations in coastal areas. In the spring and summer, it can be found in the Great Lakes region and the Great Plains region. Unlike the closely related hoary bat, males and females have the same geographic range throughout the year.[17] Formerly, some authors included the western United States, Central America, and the northern part of South America in its range,[5] but these populations have since been reassigned to the desert red bat, Lasiurus blossevillii.[16]
The eastern red bat is evaluated as least concern by the IUCN, the lowest-priority conservation category. It meets the criteria for this designation because it has a wide geographic range, large population size, it occurs in protected areas, it tolerates some habitat disturbance, and its population size is unlikely to be declining rapidly.[1]
Eastern red bats and other migratory tree bats are vulnerable to death by wind turbines via barotrauma.[18] The eastern red bat has the second-greatest mortality from wind turbines, with hoary bats most affected.[19]
While eastern red bats have been documented carrying the spores of Pseudogymnoascus destructans, the fungus that causes white-nose syndrome, no individuals have been observed with clinical symptoms of the disease.[20]
The eastern red bat (Lasiurus borealis) is a species of microbat in the family Vespertilionidae. Eastern red bats are widespread across eastern North America, with additional records in Bermuda.
El murciélago colorado (Lasiurus borealis) es un quiróptero de mediano tamaño que se alimenta de insectos. Muy ágil en el vuelo, atrapa a sus presas en el aire (principalmente coleópteros y dípteros)
Presenta un pelaje marrón-rojizo, con una longitud alar de unos 11 cm. Es un animal solitario que no habita en colonias.
Desde el sur de Canadá hasta Bermuda. Los encontrados en Sudamérica son considerados ahora otra especie diferente.[2]
El murciélago colorado (Lasiurus borealis) es un quiróptero de mediano tamaño que se alimenta de insectos. Muy ágil en el vuelo, atrapa a sus presas en el aire (principalmente coleópteros y dípteros)
Lasiurus borealis Lasiurus generoko animalia da. Chiropteraren barruko Vespertilioninae azpifamilia eta Vespertilionidae familian sailkatuta dago
Lasiurus borealis Lasiurus generoko animalia da. Chiropteraren barruko Vespertilioninae azpifamilia eta Vespertilionidae familian sailkatuta dago
Lasiurus borealis
La Chauve-souris rousse (Lasiurus borealis) est une espèce de chauve-souris de la famille des Vespertilionidae qui se trouve en Amérique du Nord.
Cette espèce habite dans une zone d'expansion qui s'étend sur tout l'Est de l'Amérique du Nord et jusque qu'aux îles des Bermudes. On la retrouve essentiellement dans des lieux dégagés. Les chercheurs les capturent en général à proximité de cours d'eau et de routes.
Elle est de taille moyenne par rapport à la famille des Vespertilionidae, elle pèse de 9,5 à 14 grammes et mesure environ 11,2 cm de long. Les adultes sont dimorphiques ce qui signifie que les mâles ont une fourrure rousse alors que les femelles ont une coloration châtain avec des traces blanches. L'animal se nourrit d'insectes dont une majorité de lépidoptères. L'animal se déplace et se positionne grâce à l'Echolocation dans des fréquences allant de 35 à 50 kHz.
La période de reproduction a lieu à la fin de l'été ou en automne et le sperme est stocké à l'intérieur de la femelle jusqu'au printemps lorsque commence l'ovulation. En juin, la femelle met bas de trois à quatre jeunes. La température nécessaire lors de la gestation limite l'extension de l'animal vers le nord. En hiver, les spécimens situés au nord migre vers le sud.
Lasiurus borealis
La Chauve-souris rousse (Lasiurus borealis) est une espèce de chauve-souris de la famille des Vespertilionidae qui se trouve en Amérique du Nord.
Il vespertilio rosso orientale (Lasiurus borealis Müller, 1776) è un pipistrello della famiglia dei Vespertilionidi diffuso nell'America settentrionale.[1][2]
Pipistrello di piccole dimensioni, con la lunghezza totale tra 95 e 126 mm, la lunghezza dell'avambraccio tra 37 e 42 mm, la lunghezza della coda tra 45 e 62 mm, la lunghezza del piede tra 8,5 e 10 mm, la lunghezza delle orecchie tra 17 e 18 mm e un peso fino a 16 g.[3]
La pelliccia è lunga e densa. Le parti dorsali sono rossastre, cosparse di peli biancastri, mentre le parti ventrali sono leggermente più chiare. Sulle spalle sono presenti delle macchie bianco-giallastre. Il muso è appuntito e largo, dovuto alla presenza di due masse ghiandolari sui lati. Le orecchie sono corte, arrotondate e ben separate. Il trago è corto, stretto, con l'estremità arrotondata e curvato in avanti. Le ali sono attaccate posteriormente alla base delle dita dei piedi. La punta della lunga coda si estende leggermente oltre l'ampio uropatagio, il quale è densamente ricoperto di lunghi peli dello stesso colore del dorso. Il calcar è lungo e privo di carenatura.
Si rifugia solitariamente tra il denso fogliame degli alberi a circa 1-3 metri dal suolo e talvolta nelle grotte. L'attività predatoria inizia la sera, talvolta ancora con la luce del giorno. Effettua migrazioni verso sud in inverno per ibernarsi. Entra in uno stato di torpore diurno a temperature sotto i 20 °C.
Si nutre di insetti, principalmente falene, catturati intorno agli alberi, sopra specchi d'acqua e intorno alle luci dei lampioni.
Si accoppiano in volo solitamente ad agosto o settembre. Dopo aver ritardato la fertilizzazione e trattenuto lo sperma fino a marzo o ad aprile, danno alla luce normalmente 2, talvolta fino a 5, piccoli alla volta a metà giugno. Vengono svezzati dopo circa 38 giorni di vita e sono in grado di volare dopo 5 settimane.
Questa specie è diffuso negli Stati Uniti d'America ad est del meridiano 103° W e nel Messico nord-orientale.
Vive in zone moderatamente popolate dall'uomo, evitando quelle densamente urbanizzate.
La IUCN Red List, considerato il vasto areale, la popolazione presumibilmente numerosa, la presenza in diverse aree protette e la tolleranza alle modifiche ambientali, classifica L.borealis come specie a rischio minimo (LC).[1]
Il vespertilio rosso orientale (Lasiurus borealis Müller, 1776) è un pipistrello della famiglia dei Vespertilionidi diffuso nell'America settentrionale.
De rode vleermuis (Lasiurus borealis) is een zoogdier uit de familie van de gladneuzen (Vespertilionidae). De wetenschappelijke naam van de soort werd voor het eerst geldig gepubliceerd door Müller in 1776.
Bronnen, noten en/of referenties
Multimedia w Wikimedia Commons Kosmatnik rdzawy[2], dawniej: mroczek rudy (Lasiurus borealis) – gatunek ssaka z rodziny mroczkowatych.
Występuje w lasach z polanami i porębami Ameryki Północnej na Wielkich Antylach i Galapagos.
Kosmatnik rdzawy ma sierść ceglastoczerwoną do rdzawobrązowej, z białawym połyskiem; samce są jaśniej ubarwione od samic. Kosmatniki rdzawe, które zamieszkują kontynent północnoamerykański lecą jesienią na południe, a wiosną znów wracają na północ.
Gatunek ten wyróżnia się szczególnie dużymi miotami; często w czerwcu lub na początku lipca samica rodzi 3 lub 4 młode. Matka początkowo nosi potomstwo ze sobą, nawet wówczas gdy waga młodych przewyższa jej własną.
Kosmatnik rdzawy, dawniej: mroczek rudy (Lasiurus borealis) – gatunek ssaka z rodziny mroczkowatych.
Lasiurus borealis é uma espécie de morcego da família Vespertilionidae. Pode ser encontrada nos Estados Unidos da América, Canadá, México e Bermudas.
Lasiurus borealis é uma espécie de morcego da família Vespertilionidae. Pode ser encontrada nos Estados Unidos da América, Canadá, México e Bermudas.
Lasiurus borealis[2][3][4][5][6] är en däggdjursart som först beskrevs av Otto Friedrich Müller 1776. Lasiurus borealis ingår i släktet Lasiurus och familjen läderlappar.[7][8] IUCN kategoriserar arten globalt som livskraftig.[1] Inga underarter finns listade i Catalogue of Life.[7]
Hannar når vanligen en absolut längd (med svans) av 109 mm och svansen är cirka 53 mm lång. Enligt en annan studie är den genomsnittliga kroppslängden (utan svans) 55 mm för hannar och 60 mm för honor. Underarmarna är ungefär 40 mm långa, bakfötternas längd cirka 8 mm och öronens längd cirka 10,5 mm. Påfallande är pälsens röda till rödbruna färg som är tydligast hos hannar. På undersidan förekommer något ljusare päls och på axlarna finns en vitaktig fläck. Den del av flygmembranen som ligger mellan bakbenen är täckt med päls och de utsträckta vingarna har spetsiga kanter. Vikten är oftast 7 till 13 g. Artens tandformeln är I 1/3 C 1/1 P 2/2 M 3/3, alltså 32 tänder. På öronens insida och på spetsarna förekommer ingen päls.[9]
Denna fladdermus förekommer i östra Nordamerika. Utbredningsområdet sträcker sig i nordväst till sydöstra Saskatchewan (Kanada), i sydväst till nordöstra Mexiko och i nordöst till Nova Scotia. Arten förekommer annars fram till Atlanten. På Bermudas är den troligen utdöd. Lasiurus borealis lever i olika habitat.[1]
Tidigare räknades flera andra populationer i västra USA, Centralamerika och Sydamerika till arten.[9] De godkänns sedan början av 2000-talet som självständiga arter.[4][1]
Individerna vilar i träd gömda bakom täta bladansamlingar. De jagar olika insekter. Parningen sker under hösten och sedan förvaras hanens sädesceller i honans könsdelar. Äggens befruktning äger först under våren rum. Vanligen föds två ungar per kull. De är i början nakna och väger cirka 1,5 g. Ungefär fem veckor efter födelsen kan ungar flyga och jaga självständig.[1]
Populationer som lever i norra delen av utbredningsområdet vandrar före vintern till varmare trakter. När lufttemperaturen inte når 20 C° stannar fladdermusen i gömstället och intar ett stelt tillstånd (torpor). Under sommaren är de vanligen ensamma vid viloplatsen med under vandringen bildas ofta flockar. Lasiurus borealis börjar vanligen en eller två timmar efter solnedgången med jakten. Den har flygande insekter som byten samt andra insekter som plockas från växtligheten eller från marken.[9]
Fladdermusen faller själv offer för tamkatter, för nordamerikansk opossum, för falkfåglar och ugglor samt för medelstora fåglar som blåskrika eller tuppgökar.[9]
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Wikimedia Commons har media som rör Lasiurus borealis.
Wikispecies har information om Lasiurus borealis.
Lasiurus borealis är en däggdjursart som först beskrevs av Otto Friedrich Müller 1776. Lasiurus borealis ingår i släktet Lasiurus och familjen läderlappar. IUCN kategoriserar arten globalt som livskraftig. Inga underarter finns listade i Catalogue of Life.
Lasiurus borealis — вид рукокрилих, родини Лиликові.
Країни проживання: Бермуди, Канада, Мексика, США. Ці кажани є мігруючими, що прибувають в північний клімат в середині квітня і залишають в кінці жовтня. Вони, як правило, вибирають місця проживання, які є рідко і помірно населені людьми і рідко зустрічаються в сильно урбанізованих районах. Вони захоплюють комах під час польоту, як і багато інших комахоїдних кажанів.
Lasiurus borealis — вид рукокрилих, родини Лиликові.
Lasiurus borealis là một loài động vật có vú trong họ Dơi muỗi, bộ Dơi. Loài này được Müller mô tả năm 1776.[2]
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Phương tiện liên quan tới Lasiurus borealis tại Wikimedia Commons
Bài viết họ Dơi muỗi này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn. Lasiurus borealis là một loài động vật có vú trong họ Dơi muỗi, bộ Dơi. Loài này được Müller mô tả năm 1776.
Красный волосатохвост[1] (лат. Lasiurus borealis) — вид рукокрылых семейства гладконосые летучие мыши (Vespertilionidae), распространённый в Северной Америке.
Длина тела 10,8 см, масса тела 7—13 г. Самки немного крупнее самцов. Окраска меха ржаво-коричневого цвета, на плечах белые пятна. Волосы длиной 5,8 мм на конце былые. Брюхо немного светлее спины. Уши широкие и круглые. Крылья достаточно длинные и узкие.
Красный волосатохвост активен ночью, поиски еды начинает через 1—2 часа после захода Солнца. Охотится, как правило, на летающих насекомых, а также на цикад, жуков и сверчков.
Ведёт одиночный образ жизни, скрываясь днём на деревьях и кустах на высоте 1,1—6,2 метра. Укрытия, как правило, расположены с теневой стороны. Зимой и весной мигрируют возвращаясь к местам размножения в конце октября.
Размножение происходит осенью. Через 80—90 дней периода беременности самки производят на свет 1—5 слепых, без шёрстного покрова детёнышей весом 0,5 г. Через 3—4 недели у них открываются глаза. Мех к этому времени ещё довольно короткий, по густой, детёныши весят уже 4—5 г. В возрасте 6 месяцев они становятся самостоятельными.
Вид распространён в США восточнее Скалистых гор до севера Мексики.
Красный волосатохвост (лат. Lasiurus borealis) — вид рукокрылых семейства гладконосые летучие мыши (Vespertilionidae), распространённый в Северной Америке.
Длина тела 10,8 см, масса тела 7—13 г. Самки немного крупнее самцов. Окраска меха ржаво-коричневого цвета, на плечах белые пятна. Волосы длиной 5,8 мм на конце былые. Брюхо немного светлее спины. Уши широкие и круглые. Крылья достаточно длинные и узкие.
Красный волосатохвост активен ночью, поиски еды начинает через 1—2 часа после захода Солнца. Охотится, как правило, на летающих насекомых, а также на цикад, жуков и сверчков.
Ведёт одиночный образ жизни, скрываясь днём на деревьях и кустах на высоте 1,1—6,2 метра. Укрытия, как правило, расположены с теневой стороны. Зимой и весной мигрируют возвращаясь к местам размножения в конце октября.
Размножение происходит осенью. Через 80—90 дней периода беременности самки производят на свет 1—5 слепых, без шёрстного покрова детёнышей весом 0,5 г. Через 3—4 недели у них открываются глаза. Мех к этому времени ещё довольно короткий, по густой, детёныши весят уже 4—5 г. В возрасте 6 месяцев они становятся самостоятельными.
Вид распространён в США восточнее Скалистых гор до севера Мексики.
동부붉은박쥐(Lasiurus borealis)는 애기박쥐과에 속하는 박쥐의 일종이다. 북아메리카에 널리 분포하며, 버뮤다 지역에서도 발견된 기록이 있다. 희귀종이기도 하지만, 바하마제도의 대부분 지역에 널리 분포한다.
중형 크기의 애기박쥐류로 몸무게는 평균 9.5–14g, 전체 몸길이는 112.3mm 정도이다. 성장을 마친 이후에는 보통 암수가 성적이형성을 보인다. 수컷은 털이 붉은 반면에 암컷은 밤색을 띠며 털 끝이 희다.
대부분의 애기박쥐류처럼 동부붉은박쥐는 식충성 동물이다. 먹이의 대부분은 나방이지만, 붉은박쥐는 딱정벌레류(Coleoptera)와 파리(Diptera) 등 다른 곤충도 포식한다. 반향정위 신호는 최소한의 낮은 주파수 신호이지만 주파수 범위는 아주 다양(35–50kHz)하다. 동부붉은박쥐는 몸 크기와 날개 모양 그리고 반향정위 신호 체계때문에 열린 공간 속에서 먹이를 구하는 것이 최선이다. 그러나 붉은박쥐는 좁은 시냇물과 길 위에서 먹이를 구하다가 박쥐 연구자들에게 자주 붙잡힌다.
짝짓기는 늦여름 또는 가을에 이루어지며, 수컷의 정충은 봄에 암컷의 배란과 수정이 이루어질때까지 암컷의 생식관에 보관된다. 6월에 암컷은 보통 서너 마리의 새끼를 낳고, 젖을 뗄때까지 보금자리에 매달려 새끼와 함께 지낸다. 수컷은 여름 내내 홀로 지낸다. 임신과 새끼를 돌보기 위해 고온이 필요하며, 암컷의 생식을 위해 북부 지방은 분포 지역으로 제한되는 것으로 추정된다. 동부붉은박쥐는 살아있거나 죽은 나무 속의 단단한 재목의 나무 가지에 매달려 지낸다. 소나무 농장의 테다소나무를 이용하는 게 발견되기도 한다.[2][3]
