It is an abiotic ecosystem because everything is dead.
bones from other animals
The owl eats his food whole (mice and such animals). The bits of the animal that are not digestible (hair, bones, etc.) are regurgitated (thrown up). What is thrown up is what we refer to as the "pellet".
Things that are found in owl pellets ecosystems are mites, carpet beetles, fungi and clothes moths. Owls eat all kinds of bugs they also eat mice. Schools use these pellets to teach environmental science.
depending on the food it eats where the pellet was found u can look in an owl pellet guide
The A hole
to find out what the owl has eaten
The owl pellet remans in the owls rectum until the owl decides it would be a good time to puke it out.
The outside of an owl pellet is covered in a thin slime, to assist the owl with ejecting the pellet, the undigested fur or feather tends to be the next layer, with the undigested bones on the inside.
Actually, an owl pellet is formed when an owl regurgitates up the things it can't digest easily, like feathers, fur, bones, and more. If you ever "dissect" one, it can honestly get quite fascinating, you know, figuring out what types of animals that particular bird had recently eaten.
The owl pellet shows what the owl has eaten.
pellet
The inside of an owl pellet contains the remains of bones and fur that was undigested.