Enlarge / Birds, with their different shapes, colorful plumage and fascinating behaviors, are a delight to people all over the world. They’re also in trouble.MriyaWildlife via Getty Images
Just about anywhere you look, there are birds. Penguins live in Antarctica, ptarmigan in the Arctic Circle. Rüppell’s vultures soar higher than Mt. Everest. Emperor penguins dive deeper than 1,800 feet. There are birds on mountains, birds in cities, birds in deserts, birds in oceans, birds on farm fields, and birds in parking lots.
Given their ubiquity—and the enjoyment many people get from seeing and cataloging them—birds offer something that sets them
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