We live in Massachusetts, Northeastern United States. It's late July, and our temperatures this month have ranged between 70°F (21°C) and 90°F (32°C).
Mourning doves, Zenaida macroura, live here annually for many months. Lately some look a bit disheveled. They have fewer feathers, and some of their feathers are smaller, thinner, and more fluffy, especially on the back ends of their wings and body. They seem healthy, and we haven't seen physical damage either close-up or with binoculars.
Yesterday, we found a large amount of feathers matching the sizes and colors of those of the dove. They were dispersed throughout a small evergreen bush and on the ground. We assumed a bird had been caught by an animal. My husband searched the area for a body or bones, but didn't find anything.
A friend told me that the birds in this family molt, shedding feathers and replacing some of the older feathers with new ones. I've never heard of this, but it could make sense, according to that evidence. Is it true that doves go through a molting period? If so, what triggers it? Do both male and females do it?
Our mourning doves live in the United States and Mexico. They're part of a large family of doves called Columbidae, found in many countries. In case this is a characteristic of doves in general, I'm not limiting the question to a specific breed.
These pictures are an example of what type we have, and were taken in our yard.