Thursday, January 21, 2016

Common Redpoll

Common Redpolls breed across the far northern latitudes of both hemispheres, where they are often the most common songbirds. They irrupt into the northern United States after spruce and birch seed-crops fail, often in alternating years (Knox and Lowther 2000). In my South Dakota banding studies, I found irruption years hard to predict.

This redpoll fed along with a small flock at the new Sax-Zim Welcome Center on 3 January 2016. Males take two years to become bright rosy. First year males are usually not distinguishable from the females.

1 comment:

  1. Hi Dan.. They are great little birds, and I am hoping to see them again this year before the winter is over.