Changes in the proportion of young birds in the hunting bag of Eurasian wigeon: long-term decline, but no association with climate - Pöysä, Hannu; Väänänen, Veli-Matti (Springer, 2018)
Keywords: age ratio; breeding success; hunting bag; Mareca penelope; ilmasto; linnut; vesilinnut; populaatiot; lisääntyminen; climate; temperature; waterfowl; birds; population; reproduction; lämpötila