Awakening early from a mid-day nap and surrounding by adult females in its family, an African elephant calf begins playing with its previously sleeping cousin. Using a graph theoretic...

Today, few streams are pristine until one goes to high elevations or latitudes, and most streams have a long history of alteration due to climate change and human disturbance. Questions...

For centuries followers of the Ethiopian Orthodox Church have conserved patches of native trees around church buildings as sacred sanctuaries for church communities. Today there are as...

An adult male American dipper (Cinclus mexicanus) gathers aquatic invertebrates to feed his hungry nestlings on Barnes Creek, Washington, USA.  The quality of this food can...

Colouration of insects like of the depicted tiger beetle (Cicindela sylvicola) is supposed to have multifarious reasons ranging from predator avoidance to sexual advertisement....

Brazilian reefs encompass the unique coral reef formations in the South Atlantic Ocean. This shot shows a fan worm on the top of a Montastraea cavernosa coral colony on a coral...

Phrynosoma goodei, the Goode's Horned Lizard, with its body buried in sand in the Sonoran Desert of southwestern USA. Many horned lizard species use rapid, lateral-twisting head...

Jodis lactearia, a moth of the Geometridae family that commonly occurs in deciduous woodland, resting in a floodplain forest in eastern Austria. Terrestrial arthropod...

Two polar bear cubs nestled against their mother on the sea ice of the Beaufort Sea. Polar bears travel and hunt on the sea ice, which itself can drift many kilometres per day. We used...