Like Dave mentioned, birds, primarily ravens, along with some raptors and eagles, will pick a carcass clean in no time, far quicker than carrion eating predators and varmints.
I shot a coyote a few years back that was hit badly and had a touch of mange, so it just wasn't worth skinning. Seven hours later, made a pass thru the same area as the road made a large loop thru the area. I saw a bald eagle and a mob of ravens leave from the lacation I had left the coyote. It looked about like the one in Daves photo, just a picked over skeleton.