Redpolls are small passerine birds found mostly in the Northern Hemisphere. There are three known species of redpolls namely: Common Redpoll (Carduelis flammea), Lesser Redpoll (Carduelis cabaret), and the Arctic Redpoll (Carduelis hornemanni).
They are generally brown or gray-brown in color and with the distinguishable red markings on their foreheads. The bill is small and yellow.
Adults average 11.5-14.5 cm long with 20-25 cm wingspan and weigh between 12-16 g. Redpolls are generally seed-eaters but at times feed on small insects.