welcome swallows flying on to an old log perch

australia avian beak bird birds black blue century cheeky dainty family fauna feather feathers flight flocks flying forked hirundo islands little log long metallic middle migratory motion native nature nearby neoxena nesting new old ornithology passerine perch perched perching plumage rusty selfintroduced small soft species spotted spring summer sunshine swallow swallows swift tail twentieth two warble welcome wild wildlife wings wooden zealand