来自MSN1 个月
6 Bird Beak Types and How Birds Use Them to Eat
A bird beak is the most important resource it has, and every species has one solely designed for survival. Birds use beaks for just about everything: building nests, feeding their young ...
Hard bites and slow songs: How beak size affects the singing and evolution of songbirds
The Java sparrow is ready for the video recording. As I hold it carefully in my hand in order to transfer it to the recording ...
The Conversation5 天
Hard bites and slow songs: How beak size affects the singing and evolution of songbirds
How fast does the beak move? To answer these questions, I’m recording high-speed X-ray videos of the feeding birds. Interestingly, I discovered some fascinating differences in beak movement ...
National Geographic news3 年
Cooper's Hawk
The “chicken hawk” of colonial America, this medium-sized accipiter is a common sight at home bird feeders ... and flat-topped head are good field marks. Eye is close to the beak.