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Birds of Central America: A Field Guide Review

10,000 Birds

The one on the left is from the book being reviewed here, Birds of Central America , and the plate on the right is from Birds of Peru. The images on the right, from the Peru field guide, are more intense in color. The two plates above are both by Dale Dyer. Compare the images of Blue-gray Tanager. The picture gets complicated.

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How much bird is there, anyway?

10,000 Birds

I was looking out a car window the other day and noticed that of all the wildlife most of it was bird. Here’s some data from the famous research project of Manu, Peru, giving biomass in kilograms per hectare. There are probably other major trends that depend, for example, on latitude and timing. Paul and St. Peter islands.

Mammals 172