Grey Wagtail, Motacilla cinerea seen on top of a rock busy preening itself at a stream in Huai Kha Kaeng Wildlife Sanctuary Thailand

grey wagtail wagtail passerine stream yellow river flowing migration ornithology migratory birds foraging wildlife plumage motacilla running water conservation rocks bird watching water flowing motacilla cinerea national park nature natural habitat southeast asia insectivores thailand national parks animals feathers warm jungle summer wind tail forest sanctuary breeze evergreen wings outdoor green rainforest wagging windy grass plants tropical huai kha kaeng grey