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Home > BirdNote > When Does a Crossbill's Bill Cross?
Podcast: BirdNote
Episode:

When Does a Crossbill's Bill Cross?

Category: Religion & Spirituality
Duration: 00:00:00
Publish Date: 2020-02-11 02:00:00
Description: A young crossbill starts life with a wedge-shaped beak. As it grows up and starts to feed itself by removing conifer seeds from their tough packaging, the tips of its bill begin to grow rapidly — and then they cross.
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