Mourning Dove

I've previously posted on the mourning dove on August 29, 2020 and on April 28, 2021. I visited the Sonny Bono National Wildlife Refuge headquarters on Saturday, July 5, a very warm day, and it was filled with an overwhelming number of doves, mourning doves in particular. I saw immature mourning doves for the first time and thought I was seeing different birds. Photos from this past Saturday follow:

I photographed this young dove underneath the canopy of a large tree and originally thought it must be a ground dove. 

This immature dove was standing on a bench near the Visitors Center and I thought it might be a new kind of dove. It is much more developed than the first dove, above, but still looks quite a bit different from a mature bird. 

The way these two doves hugged the ground I thought they were ground doves. An enlarged photo of the one on the right below. The white fluffy underbelly threw me off. 

A couple of photos of mature birds.

As my prior posts don't show a range map or illustration, I add them below. 

This is an illustration of the subspecies marginella, the one we have in the western U.S., from Birds of the World. 

A range map from Birds of the World.