Wikipedia:POTD column/February 4, 2006

The boobies are a group of seabirds closely related to the gannets. They are large birds with long pointed wings and long bills.

Boobies hunt fish by diving from a height into the sea and pursuing their prey underwater. They have facial air sacs under their skin which cushion the impact with the water. Boobies normally lay one or more chalky blue eggs on the ground or sometimes in a tree nest. Their name is based on the Spanish slang term bubi, meaning "dunce".

Photo credit: United States Coast Guard
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