The gender of house finches (first image) and cardinals (second image) is easy to determine. In both of these bird types, the males are red. But the gender of the mourning dove bird type (third image) is a bit harder to determine.
However, in our book, Words In Our Beak, Volume One Cam gives the reader a few things to look for when determining the gender of a mourning dove. Cam has this to say on the matter:
"In terms of mourning doves, males are a little larger and more colorful than females, with bluish iridescence on the crown and pink on the breast. The mourning dove's tail has long inner feathers, white on the edges, and tapers to a point. Their feet are dull red. Their beaks are thin and black. They have large dark spots on the upper surface of their wings. The wings make a whistling sound when the bird flies and they sometimes clap their wings together noisily above and below the body when they take off suddenly. Males and females have a small dark comma-shaped mark on both sides of the head below and behind the eyes. Their eyes are dark brown and ringed about with pastel blue skin."
This is one of many interesting facts that Cam reaches readers about mourning doves in volume one of Words In Our Beak, Volume One, which is now available via Apple's iBooks store, as well as on Amazon. AND it's been reviewed on Goodreads! Moreover, info regarding it is featured on a page for NPR's WNYC station!
Btw, all the pictures within this Blogger entry were taken in my urban (NYC) garden and are included in Words In Our Beak Volume One.
ADENMENDUM: The digital versions of Volume One within the Words In Our Beak book series that are mentioned in this entry may only remain available for a limited time, but a hardcover version of Volume One can be found wherever books are sold.
Moreover, Volume Two of the book series is now available! Both volumes one and two are in hardcover format (as seen below) and can be purchased any place where books are sold.
Volume One: ISBN: 9780996378529:
Book Seller Info: http://bit.ly/2AFZDCz