urban bird landing on birdhouse

abode aeronautics american animal apartment architecture audubon aviation background base behavior bird birder birdhouse birding black bokeh call calling chicks conecticut effect eggs elevated feeder female flap flapping flight garden grass gray grey habits hanging hobby house landing male martin mate migration migratory natural nature nest nesting new northeast off ornithology outdoors placement purple reside route silhouette silvia small society songbird species stick structure study suspended taking tending twigs urban vireo warbler watchful where white winged wings wooden york