- Data from: Grey plumage colour is more cryptic than brown in snowy landscapes in a resident colour polymorphic bird(2020-02-13) Koskenpato, Katja; Lehikoinen, Aleksi; Lindstedt, Carita; Karell, Patrik; University of Helsinki - Koskenpato, Katja; University of Helsinki - Lehikoinen, Aleksi; University of Jyväskylä - Lindstedt, Carita; Novia University of Applied Sciences - Karell, Patrik