Jeju Wildlife Research Center
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21-05-24 Á¶È¸¼ö: 1,367

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https://www.audubon.org/news/why-some-songbirds-kick-their-chicks-out-they-can-fly

So why would parents ever let their young leave before they can fly? The difference is how easy it is for predators to find or access the nest. Species that use cavities, like the chickadees, are safer from predators than species that use open cups, like the juncos. When snakes, jays, or squirrels find bird nests, more often than not they¡¯ll destroy the entire brood, Martin says. So for the adult juncos, even if only one of their offspring survives their early days of independence, it's worth the tradeoff.

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https://advances.sciencemag.org/content/4/6/eaar1988.full

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