Willow ptarmigan in favourable seasons, many juveniles may survive and the population of willow ptarmigan is prone to wide fluctuations in size. By September, families begin to form flocks. The females and young migrate to lower altitudes and may overwinter from their breeding grounds in wooded valleys and hilly country. The males also congregate in small groups but do not usually travel as far as the females. The willow ptarmigan was adopted as the state bird of Alaska in 1955. Widespread and not uncommon in its remote habitat, the willow ptarmigan is classified as a species of "Least Concern" by the IUCN.
Winter white dwarf hamster white is known to be one of the most tameable types of hamsters. The hamster has no fully accepted common name, Winter white dwarf hamster and Russian dwarf hamster are among the most often used. Confusion arises because of their physical similarity to the Campbell's dwarf hamster, consequently the name Djungarian hamster and Russian dwarf can refer to both Winter white and Campbell's dwarf hamsters. The term "Winter white" derives from the fact that in the wild the hamster changes it's fur colour to white for the winter months, this camouflages the hamster and reduces predation when snow is on