a common yellowthroat warbler sings on top of a tree

common yellowthroat songbird warbler blackmasked beak bird birdsong birdwatching sing singing animal avian black blue sky call canary chirp clouds elm fauna forest green isolated leaf leafy leaves people one ornithology passerine perch perched profile single sit skyline solitary woodland yellow cook county preserve geothlypis trichas illinois spears woods united states