Not to be gruesome but it all depends.
All of Iowa is mixed coyote/fox territory. If the local territory is held by fox, then I wouldn't expect the bodies to be scattered and maybe not even subject at all to animal scavenging.
My sense, just from looking at the photos, is that it is more likely to be fox territory than coyote territory. Coyote prefer more open areas and they particularly prefer places with a lot of human presence (we're so generous about feeding them). Fox prefer areas with heavier cover and not so much human presence.
The two species do coincide over most terrain and the balance of their territories tends to go back and forth. For instance, I had a lovely coyote queen living in my backyard for 6 years before she disappeared (I think she probably died; she was a grand age for a coyote). I expected one of her offspring to take up the territory but a fine red fox has moved in instead. I know where there are at least two vixens close by, so this spring, maybe cubs.
I think there's a 50/50 chance that the bodies would have been subject to heavy animal scavenging.
