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Great Egrets and the reliability of field marks

10,000 Birds

I was still telling the truth when I mentioned the four subspecies, species, taxa, forms, you name it, of the Great Egret: modesta (Asia), alba (Europe, Asia), egretta (Americas) and melanorhynchos (Africa). Absolute field marks between two similar species describe a difference that can be judged definitely by looking at a single bird.

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Urban Ornithology: 150 Years of Birds in New York City–A Book Review

10,000 Birds

The book is divided into three parts: “Introduction,” “Avifaunal Overview,” and “Species Accounts.” The authors trace the creation of swamps, wetlands, and meadows by farmers, and then the destruction of wetlands by the building of golf courses, the loss of meadows by the construction of train tracks. It’s a very mixed chapter.

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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. There are variations on that theme, of course. They looked at fairy-wrens and cuckoos.

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