Franco Banfi / Striped marlin (Kajikia audax) hunting Sardine (Sardinops sagax) in bait ball. Magdalena Bay, Baja California Sur, Mexico.

Franco Banfi / Striped marlin (Tetrapturus audax) feeding on Sardine (Sardinops sagax). Magdalena Bay, Baja California Sur, Pacific Ocean, Mexico.

Richard Du Toit / Red-billed Oxpecker (Buphagus erythrorhynchus) on Burchell's Zebra (Equus burchellii), Mkhuze Game Reserve, KwaZulu-Natal, South Africa

Konrad Wothe / Three-striped poison frog (Ameerega trivittata) croaking, Panguana Reserve, Huanuco Region, Peru.

Bert Willaert / Marbled poison dart frog (Epipedobates boulengeri) on leaf, Ecuador.

Jeff Rotman / Orangespine unicornfish (Naso lituratus) profile portrait, Red Sea, Egypt.

Richard Du Toit / Cattle Egret (Bubulcus ibis) on Burchell's Zebra (Equus burchellii), Rietvlei Nature Reserve, Gauteng, South Africa

Edwin Giesbers / Grevy's zebra (Equus grevyi) close up, captive

Markus Varesvuo / Black-throated Diver (Gavia arctica) Vaala Finland June

Andy Rouse / Burchell's Zebra (Equus quagga) foal hiding under its mother's tail. Masai Mara, Kenya.

Andy Rouse / Burchell's Zebra (Equus quagga) mother with new born foal. Masai Mara, Kenya.

Andy Rouse / Grevy's Zebra (Equus grevyi) in late sunlight. Samburu, Kenya, Africa. (non-ex).