The Eurasian Treecreeper is a small, inconspicuous songbird that is perfectly adapted to life on tree trunks with its brown marbled back coloration. Its belly is snowy white, and its bill is thin and slightly curved downward, allowing it to search for food in the narrowest cracks of tree bark.
Its habitat consists primarily of coniferous and mixed forests in the midlands and highlands, where it is found up to the forest line. It characteristically climbs spirally upward on trunks, supporting itself with its stiff tail; when it reaches the top or higher branches, it flies to the base of the neighboring tree and repeats the ascent. It feeds on small insects, spiders, and their larvae, and occasionally on conifer seeds in winter.
In Slovenia, it is a widespread species that breeds and also overwinters here. It preferably builds its nest behind loose tree bark or in deep cracks of old trunks. Hikers often spot it in forests as a small "mouse" that nimbly runs up trunks, and it most often draws attention to itself with its characteristic thin and high-pitched call.
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