Marie Lochman / Tree Top Walk - Valley of Giants, tourist attraction - walk in the canopy of Red Tingle giant eucalyptus (Eucalyptus jacksonii) trees, Walpole-Nornalup National Park, south west, Western Australia, Ja...

Marie Read / Black-necked stilts (Himantopus mexicanus) pair performing post-copulatory display (as copulation ends, the male slides off the female leaving his wings draped over her and crossing his bill with hers...

Jami Tarris / African Elephant (Loxodonta africana) herd on savanna, Mount Kilimanjaro, Amboseli National Park, Kenya

Duncan Murrell / Young children from Barangay Tagabinet having a nature walk around Ugong Rock, Palawan, the Philippines.

Giri Cavale / Melanistic leopard / Black panther (Panthera pardus) on territorial patrol on track, Nagarahole National Park, Nilgiri Biosphere Reserve, Karnataka, India.

Juergen & Christine Sohns / Black-footed Penguin (Spheniscus demersus) pair on beach, Betty's Bay, Stony Point Nature Reserve, South Africa

Benjamin Olson / Gentoo Penguin (Pygoscelis papua) wading, Antarctica

Sue Daly / Close-up of a Seven rayed starfish (Luidia ciliaris) moving over the seabed, showing use of its tube feet to walk, Sark, British Channel Islands, UK, August.

Sue Daly / Seven rayed starfish (Luidia ciliaris) moving over the seabed, showing use of its tube feet to walk, Sark, British Channel Islands, UK, August.

Rob Drummond/ BIA / Pied Oystercatcher (Haematopus longirostris), Victoria, Australia

Greg Oakley/ BIA / Red-capped Plover (Charadrius ruficapillus) on beach, New South Wales, Australia

Ingo Arndt / Cheetah (Acinonyx jubatus) male walking by Burchell's Zebra (Equus burchellii) herd, Masai Mara, Kenya