- Data from: Grey plumage colour is more cryptic than brown in snowy landscapes in a resident colour polymorphic bird(2020-02-13) Karell, Patrik; Novia University of Applied Sciences-Karell, Patrik
- Data from: Regional variation in climate change alters the range-wide distribution of colour polymorphism in a wild bird(2023-07-11) Karell, Patrik; Uppsala University-Karell, Patrik