Pectoral sandpiper

Pectoral sandpipers migrate to the Arctic coast from South America, passing through the Great Plains and both coasts of North America. "Pectoral" refers to the inflatable air sac on the male's chest, which he puffs out and uses to "hoot" for a mate while flying over the Arctic tundra. Listen here: www.audubon.org/news/listen-pectoral-sandpipers-amazing-a...