JavaScriptが無効です。ブラウザの設定でJavaScriptを有効にしてください
再生時間:
投稿日:
動画サイト:
画質:
Arrelious Benn was a natural athlete from a young age. Growing up in Washington D.C. Arrelious always saw football as his way to out grow ...
YouTube-Grit-org
How do crossbills use their crossed mandibles to feed? Why are crossbills usually nomadic? Why do they breed at unusual times?
YouTube-Boulder County Audubon Society
Crossbils move 100s of miles a year in search of cone crops
Cassia Crossbills
Population declined 89% between 2003 and 2011
Why did Cassia Crossbils decline and then rebound?
Hot summer days cause cones to open & shed seeds
Why crossbills are nomadic