Two Mute swans (cygnus olor) swimming mating on the Rhine, Germany, Europe

2 animals 2 adult animals adult animal affection anatidae animal behavior animal behaviour animal couple animal pairs animal pair animals in the wild animals animal anseriformes aquatic bird aves behavior behaviour bird photography birds bird central europe couples couple courting seasons courtship behaviors courtship behavior courtship behaviour courtship display courtshiping courtship season courtship cygnini cygnus olor cygnus deserted display behavior display behaviour displaying display duck birds duck bird empty europe fauna female animals female animal female geese bird german federal republic germany habitat heart shaped hearts heart love maiting pair male animals male animal male mating behavior mating behaviour mating period mating season mating time middle europe mute swans mute swan natural environments natural environment natural habitat nobody no one no people overawing pair perform the courtship display rhein rhine rivers river rutting season side by side social behavior social behaviours social behaviour swans swan swimming swim symbolic symbols symbol two animals two uninhabited water birds water bird waterfowl water white wild animals wild animal wildlife photography wildlife woo