Eurasian siskin Bird on Leafless Tree Branch in Seoul Forest Park, South Korea

siskin eurasian spinus bird leafless branch jump twig zoom seoul fauna animal one yellow plumage feather back front tail beak face eye 4k detail alerted alert fly away shoot up take wing perched forest wild wildlife ornithology avian passerine tiny scandinavia finch spinus spinus sunlight daytime look around frighten autumn autumnal environment