Junco hyemalis (Linnaeus 1758)

Junco hyemalis, 47

Leistes militaris, 60

Limnothlypis swainsonii, 26

Machetornis rixosus, 54

Melospiza georgiana, 50

lincolnii, 50

melodia, 50

Melozone biarcuatum, 68

Mimus patagonicus, 56

polyglottos, 66

saturninus, 56

thenca, 56

Mniotilta varia, 26

Muscivora tyrannus, 54

Myiarchus crinitus, 12

tyrannulus, 55

Junco hyemalis (Linnaeus)

The dark-eyed junco, as presently understood, includes the races of the previously separated “Oregon” junco as well as those of the “slate-colored” junco.

Of the race j. hyemalis cismontanus, previously (Friedmann, 1963:161) known as a cowbird victim in British Columbia, we may note a parasitized set from the Fort Assiniboine District, Alberta, 8 June 1946, now in the collections of the Western Foundation. Of the “Oregon” junco portion of the species we may add the first records of cowbird parasitism on the subspecies j. hyemalis shufeldti—from near Victoria, southern Vancouver Island (Lemon, 1969), and from near Portland, Oregon, a set now in the collections of the Western Foundation. The small number of previous records for the races of the “Oregon” junco were of the subspecies J. h. montanus, J. h. thurberi, and j. h. pinosus. Three additional instances of parasitism on j. h. thurberi are mentioned by Rogers (1971: 881) and 11 more by White (1974) out of a total of 40 nests studied by her in meadow sites in the Sierra Nevadas, Nevada County, California. Further south in the Sierras (Mono County) one of us (S.I.R.) found a parasitized nest with 2 cowbird eggs laid during the first 3 days of August, a very late date.

In New York, from whence we previously knew of only 2 records, Bull (1974:537) has added 6 more cases.

CHIPPING SPARROW