Seen perched on a bare branch with blue sky background as it looks to its back and preening at the same time, Grey-rumped Treeswift Hemiprocne longipennis, Kaeng Krachan National Park, Thailand

greyrumped treeswift broadbill birds of thailand habitat grey throat apodiformes kaeng krachan national park nestlings branch birds perch nesting swifts hemiprocne longipennis branches twigs wildlife hemiprocnidae myanmar flying lowland forest breeding canopy feathers black feathers natural habitat tropical mangrove trees sky nature small montane malaysia phanoeng thung crest forest hemiprocne blue green jungle philippines rainforest thailand rainy season pylons brown green bokeh tropical black