Fig. 1From: Plastering mud around the entrance hole affects the estimation of threat levels from nest predators in Eurasian NuthatchesResponse of Eurasian Nuthatches (Sitta europaea) and Cinereous Tits (Parus cinereus) to Common Chipmunks (Tamias sibiricus, a small nest predator) and Red Squirrels (Sciurus vulgaris, a larger nest predator)Back to article page