Japanese pygmy woodpecker bird hangs upside down on tree trunk searching food

pygmy woodpecker japanese woodpecker japanese pygmy woodpecker yungipicus kizuki tree forage crawl peck search food closeup close up bird detail macro trunk japan korea beak bill autumn bark behavior behaviour eating feather insect forest one searching sunlight wild wildlife pecking pygmy animal tree trunk perched seoul forest climb insects foraging jump climbs up claw feed ecosystem upside down