Michael D. Kern / Johnston's Chameleon (Chamaeleo johnstoni) walking along branch, Uganda

Duncan Usher / European Beaver (Castor fiber) bite marks on felled birch tree, Germany

Ralph Martin / Three-toed Woodpecker (Picoides tridactylus) damage on bark, Baden-Wurttemberg, Germany

Konrad Wothe / Animal tracks in snow near Penzberg, Bavaria, Germany

Konrad Wothe / Engraver Beetle (Ips typographus) traces under bark, Bavaria, Germany

Ingo Arndt / European Beaver (Castor fiber) marks left on tree trunk, Mecklenburg-Vorpommern, Germany

Ingo Arndt / Red Fox (Vulpes vulpes) tracks on frozen lake, Germany

Konrad Wothe / Eurasian Kestrel (Falco tinnunculus) print left in snow after catching a mouse, Germany

Ingo Arndt / European Beaver (Castor fiber) fresh bite marks and felled trees, Spessart, Germany

Ingo Arndt / European Beaver (Castor fiber) fresh bite marks on gnawed tree, Spessart, Germany