Two mute swans grazing on a field

wildlife mute swan mild winter overwinter swan graze migratory forage crop field frosty ornithology cygnus olor birdlife winter white plumage birdwatching cob environment cold agriculture bird frosted bird watching countryside nature climate change large cygnus orange bill two poland eat big majestic pen wild calm morning impressive beautiful europe afternoon real time pest nuisance sunny no people static shot