Looks like what they are to me too although three together wouldn't be usual would it, unless you were under a roost or nest?
I don't know, maybe this was a favoured spot, or maybe they throw up more than one pellet at a time. There were in fact five pellets, the other two had fallen off the rock. I wasn't under anything - this was bare tundra, 1000m above sea level.
What about Eagle Owl?
Also, I am quite a dude, but my guide to bird tracks says that Ural Owl has pellets up to 6,5 cm long and Short-eared Owl up to 6 cm. Animal Tracks and Signs says Long-eared Owl up to 7,5cm and Short-eared rather longer. I would hesitate to rule smaller owls out, because pellets and droppings can be of variable size.
Pine Marten scat. At least I think soo
I cannot imagine anything else but owl pellets here as afaik all mammal predators will disolve bones in their stomach and only reject fur, chitin or seed kernels, (as do diurnal raptors)
So why so many in one place, in the open?
How regular is Snowy Owl breeding in Sweden?
From what I can recall from chatting to a couple of birding chums from Stockholm, Snowy Owl is at best a very rare breeder in Sweden - if at all - and hard to connect with. Arbu may have some current info though.