By A Mystery Man Writer
Female bluebirds sing to strengthen and maintain the bond with their mates.
Some birds learn to recognize calls while still in their eggs
Birds that Sing While Flying: Motion Music - The UNXOX
Program Night — Eastside Audubon Society
Cardinal Rule: Female Birds Sing, Too
An appeal to document female birdsong - BirdGuides
Why Do Female Birds Sing?
Why Do Birds Chirp in the Morning? 5 Surprising Reasons
Naturalist Nights
Male nightingales sing complex songs to show females they will be good fathers, say scientists, The Independent
Has the Biggest Week in American Birding been canceled?
President's Letter: Springtime Events are Coming! — Eastside