an adult sand martin riparia riparia perched on a tree branch in denmark. with in the background the colours of the sand wall.

active adult air amazing animal aves avian background beautiful bird birds branch brown carnivora chicks coadult coast colour colours couple denmark earth elegant europe european fast feathers feeding flight ground has hole hundested its landing martin martins migration mud nature near nest outdoors passerine perched quick raising reserve resting riparia sand small speed summer swallow swallows swift tree vivid wall warm wild wildlife young