There are many stray cats in my neighborhood and I see them communicate vocally all the time. Mothers definitely call audibly to locate their kittens, and vice

There are many stray cats in my neighborhood and I see them communicate vocally all the time. Mothers definitely call audibly to locate their kittens, and vice versa. They'll often call out to each other as adults, I think for mating? These cats do a thing where they get inches from each other's faces and make a very loud, very long moaning sound. I imagine it's something in the local gene pool (my neighbor has been feeding strays for over a decade, I hate it)