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<a href="http://www.accessmylibrary.com/article-1G1-161075388/interspecific-egg-dumping-violet.html" title="Facts and information about Interspecific egg-dumping by a violet-green Swallow in an active Western Bluebird nest.">Interspecific egg-dumping by a violet-green Swallow in an active Western Bluebird nest.</a>
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Interspecific egg-dumping by a violet-green Swallow in an active Western Bluebird nest.
Observations of birds laying eggs in nests of other species are of interest because this behavior, when timed appropriately and directed at nests where parents fail to recognize foreign eggs and offspring, may be the starting point for evolution of interspecific brood parasitism. Other explanations for this behavior are nest usurpation and egg-dumping, which is the deposition of an egg into another species' nest without any specific adaptive function. We collected video footage of a Violet-green Swallow (Tachycineta thalassina) laying an egg in an active Western Bluebird (Sialia mexicana) nest containing nine-day-old nestlings at Hastings Natural History Reservation, ...
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