Hans Glader/ BIA / Great Crested Grebe (Podiceps cristatus) on nest, North Rhine-Westphalia, Germany

Hans Glader/ BIA / European Robin (Erithacus rubecula) calling, North Rhine-Westphalia, Germany

Ralf Kistowski/ BIA / Great Spotted Woodpecker (Dendrocopos major) chick in nest cavity, North Rhine-Westphalia, Germany

Ralf Kistowski/ BIA / Eurasian Eagle-Owl (Bubo bubo) female, North Rhine-Westphalia, Germany

Ralf Kistowski/ BIA / Eurasian Eagle-Owl (Bubo bubo) chicks at nest cavity, North Rhine-Westphalia, Germany

Ralf Kistowski/ BIA / Great Spotted Woodpecker (Dendrocopos major) father with chick at nest cavity, North Rhine-Westphalia, Germany

Ralf Kistowski/ BIA / Mandarin Duck (Aix galericulata) male, North Rhine-Westphalia, Germany

Hans Glader/ BIA / White-fronted Goose (Anser albifrons) group flying in blowing snow, North Rhine-Westphalia, Germany

Ralf Kistowski/ BIA / Eurasian Eagle-Owl (Bubo bubo) chicks at nest cavity, North Rhine-Westphalia, Germany

Ralf Kistowski/ BIA / Sand Martin (Riparia riparia), North Rhine-Westphalia, Germany

Hans Glader/ BIA / Lapwing (Vanellus vanellus) flock flying, North Rhine-Westphalia, Germany

Heidi & Hans-Juergen Koch / Domestic Pig (Sus scrofa domesticus) nose, Borken, North Rhine-Westphalia, Germany