11 April 2014
Ruddy ducks are migrating through Pennsylvania right now but we’re not going to see the most interesting part of their lives because they reserve it for their breeding grounds in the prairie potholes of North America.
Unlike most ducks, ruddies don’t court while they’re away from home nor do they molt into breeding plumage before they begin migration. Instead they save their efforts for the big splash on the breeding grounds. At that point the males will be a deep ruddy color and their bills will be sky blue. They show off this beauty in an exaggerated bubble display.
Cornell’s Birds of North America describes the display like this (paraphrased): “The male holds his head, tail and two rows of head feathers (“horns”) erect. His inflates his neck and begins beating his bill slowly at first against his neck, forcing air out of the feathers. This causes bubbles to appear in the water. His beating intensifies toward the end of the display with a concomitant movement of his tail over his back and his head slightly forward over the water. And then he utters a low belching sound.”
Who knew that male ruddy ducks bubble and burp? I’m going to have to go West to see it.
(video from YouTube)