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A Strategic Arms Race Among Birds

10,000 Birds

The vast majority of the 10,000+ living species of birds are passerines, and the vast majority of those have a similar system of breeding: Mom and dad bird make a nest and share parental responsibilities roughly equally, if not identically. In the latter, three or more adult individuals contribute to the raising of offspring.

Breeders 198
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Bird Love Week: How They Get It Done

10,000 Birds

Within the bird world, so many different strategies and methods of mating and reproduction have evolved, it simply boggles the mind. When it comes to breeding, Yellow-rumped Warblers are a good example of what many people regard as a “regular” bird. Believe it or not, this is what “fidelity” looks like.

Albatross 190
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Birding Shanghai in June 2022

10,000 Birds

As with Chinese male humans, having your own building is still vital to raising young. One of the established ways to evaluate self-cognition in animals (including humans) is the mirror test. In the classic test, an animal is anesthetized and then marked on an area of the body the animal cannot normally see. Sometimes it works.

Birds 183