Red squirrel eating a nut on a tree

squirrel red squirrel rodent nut walnut tree tree trunk nature forest animal wildlife mammal fluffy tail eating food winter autumn portrait close-up forest dweller insectivore predator herbivore hunting reserve supplies natural habitat ecology biology zoology botany park garden cityscape street hibernation winter preparation thriftiness nature conservation animal protection biodiversity ecosystem forest fund green spaces urban forest park area urban animals wild animals in the city