Ruby-crowned Kinglet

The Ruby-crowned Kinglet is a tiny bird that lays a very large clutch of eggs—there can be up to 12 in a single nest. Although the eggs themselves weigh only about a fiftieth of an ounce, an entire clutch can weigh as much as the female herself.

www.allaboutbirds.org/guide/Ruby-crowned_Kinglet/overview

 

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