great crested grebe beak wide open (podiceps cristatus) on on the nest

newborn crest chicks life biology baby float feather cute animal wildlife bird ecology aquatic water habitat zoology environment nature wild wilderness spring ecosystem avian fauna nesting beak lake river ornithology birding waterfowl birdwatching waterbird great crested grebe wide open podiceps cristatus nest nest bas-rhin collectivite europeenne d'alsace grand est france europe