Hermann Brehm / Great spotted woodpecker (Dendrocopos major) and Grey headed woodpecker (Picus canus) on tree trunk, Germany. December

Magnus Lundgren / Wild Wonders of China / Ijima's Turtle-headed Sea Snake (Emydocehalus ijimae) Green Island, a small volcanic island in the Pacific Ocean , Taiwan

Magnus Lundgren / Wild Wonders of China / Ijima's Turtle-headed sea snake (Emydocehalus ijimae) Green Island, a small volcanic island in the Pacific Ocean, Taiwan

Bernard Castelein / Brown-headed barbet (Megalaima zeylanica), Keoladeo NP, Bharatpur, India

Bernard Castelein / Brown-headed barbet (Megalaima zeylanica), Keoladeo NP, Bharatpur, India

Marie Read / Bird-friendly garden in full bloom in summer, New York, USA, including purple coneflowers (Echinacea purpurea) and green-headed coneflowers (Rudbeckia laciniata), black-eyed susans (Rudbeckia sp.), be...

Marie Read / Yellow-headed Blackbird (Xanthocephalus xanthocephalus) male perched in marsh vegetation (Phragmites) in foreground. Bear River Migratory Bird Refuge, view toward east, with Wasatch Mountains in dista...

Staffan Widstrand / Grey-headed woodpecker (Picus canus) on lichen and snow covered tree trunk. Kalvtrask, Vasterbotten, Lapland, Sweden. January.

Staffan Widstrand / Grey-headed woodpecker (Picus canus) on tree trunk. Kalvtrask, Vasterbotten, Lapland, Sweden. January.

Staffan Widstrand / Wild Wonders of China / Grey-headed lapwing (Vanellus cinereus) walking on green grass in Inner Mongolia, China

David Fleetham / Bumphead parrotfish (Bolbometopon muricatum), Yap, Micronesia.

David Tipling / Grey-headed woodpecker (Picus canus) female Hortobagy National Park, Hungary January