Konrad Wothe / Domestic Cat (Felis catus) kitten, 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) chicks at nest cavity, North Rhine-Westphalia, Germany

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

Mathias Schaef/ BIA / Rose-ringed Parakeet (Psittacula krameri) chick in nest cavity, Baden-Wurttemberg, Germany

Ralph Martin/ BIA / Sand Martin (Riparia riparia) chicks in nest cavity, Baden-Wurttemberg, Germany

Thomas Hinsche/ BIA / Red Fox (Vulpes vulpes) pups, Saxony-Anhalt, Germany

Willi Rolfes/ BIA / Eurasian Eagle-Owl (Bubo bubo) chicks, Lower Saxony, Germany

Willi Rolfes/ BIA / Eurasian Eagle-Owl (Bubo bubo) chick, Lower Saxony, Germany

Willi Rolfes/ BIA / Eurasian Eagle-Owl (Bubo bubo) chick in defensive posture, Lower Saxony, Germany

Konrad Wothe / Wild Boar (Sus scrofa) piglet, Bavaria, Germany

Juergen & Christine Sohns / Brown Bear (Ursus arctos) cubs playing, Bavarian Forest National Park, Germany