Rose-ringed Parakeet Psittacula krameri populations and numbers in Europe: a complete overview - Pârâu, Liviu G.; Clergeau, Philippe; Albayrak, Tamer; Franz, Detlev; Braun, Michael P.; Schröder, Julia; Wink, Michael (The open ornithology journal, 2016)
Gesehen am 02.02.2017