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Second Atlas of Breeding Birds in Pennsylvania: A Review by an Atlas Novice

10,000 Birds

A breeding bird atlas is a special kind of book. For the nature lovers and birders who participate in breeding bird surveys, the atlas represents hours, often hundreds of hours, of volunteer time spent within a community of citizen scientists doing what they love, observing birds. So, what exactly does a breeding bird atlas contain?

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Manx Shearwaters

10,000 Birds

Each year 120,000 birds visit the island to breed from March through August in burrows that riddle the landscape. Shearwater remains litter the island with the carcasses picked clean, leaving just the wings, breastbone and girdle. After mating, a single egg is laid and incubation duties are shared by both parents.