Adaptations are key to any animals’ survival, and each species is adapted to its own habitat. This is readily apparent in the fates of two different birds spotted in the Northwoods this winter. An out-of-place yellow-rumped warbler was impressive because of how long she survived in the cold against all odds, without the right adaptations to get her through. Redpolls are equally impressive because their adaptations are built to help them thrive in those same, challenging conditions. They are all tough little birds.