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In the Spring both the male and female Ladder-backs use this squeaky introduction to their normal whinny. Sometimes the female uses just the squeaks as a kind of "purr" without the whinny call following.
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Hairy Woodpeckers (Picoides villosus) PEEK a lot like the Ladderbacks, just a bit more insistently. This one was atop Mingus Mountain, 2/22/99.
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A Blue and White Swallow (Pygochelidon cyanoleuca) flies over a small slough near Grano de Oro, in the Talamanca range (Costa Rica), 6/24/99.
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A Red-breasted Blackbird (Sturnella militaris) sits on a fencepost and calls near Grano de Oro (Costa Rica), 6/24/99. The locals call him "Veranero" or a "Cacique veranero". This has been a South Pacific lowland bird, but reports of it moving north throughout the country are increasing. In this case, the bird is in the eastern Talamancas, far from the southeast lowlands!
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