partridge and anthus cervinus sang beside the polygonum avium at the edge of the field.

adult animal asphalt attention avium balance bird blooming breeding camouflage cervinus chirp conservation courtship diet ecosystem environment feather feathers field flight floor flooring foraging grass grassland green grounddwelling habitat incubation insectivore juvenile landscape lane lawn leaf legs line mating meadow migration molt nature nest nestling observation partridge passeriformes passerine patterns pipit plumage polygonum protection redthroated road route sand sang seed serenading soil song species stood survival tail tarmac territory vehicle vocalization wall wildlife wing wings