Martin Willis / Victoria's Riflebird (Ptiloris victoriae) male displaying at display post, Malanda, Queensland, Australia

Martin Willis / Victoria's Riflebird (Ptiloris victoriae) male displaying at display post, Malanda, Queensland, Australia

Martin Willis / Frilled Monarch (Arses telescophthalmus) male, Kutini-Payamu National Park, Queensland, Australia

Martin Willis / Scarlet Macaw (Ara macao) pair preening, Costa Rica

Martin Willis / Empress Brilliant (Heliodoxa imperatrix) and Buff-tailed Coronet (Boissonneaua flavescens) hummingbirds fighting, Andes, Ecuador

Martin Willis / Splendid Fairywren (Malurus splendens) female and male, Queensland, Australia

Martin Willis / Rainbow Lorikeet (Trichoglossus haematodus) pair preening during courtship, Magnetic Island, Queensland, Australia

Martin Willis / Budgerigar (Melopsittacus undulatus) father with begging chick at nest cavity, Queensland, Australia

Martin Willis / Rainbow Lorikeet (Trichoglossus haematodus), Malanda, Queensland, Australia

Martin Willis / Monjon (Petrogale burbidgei) mother with joey, Mitchell Plateau, Kimberley, Western Australia, Australia

Martin Willis / Monjon (Petrogale burbidgei) mother with joey, Mitchell Plateau, Kimberley, Western Australia, Australia

Martin Willis / Australian Pelican (Pelecanus conspicillatus) group, Roebuck Bay, Kimberley, Western Australia, Australia

Martin Willis / Sulphur-crested Cockatoo (Cacatua galerita) flying, Magnetic Island, Queensland, Australia

Martin Willis / Scaly-breasted Lorikeet (Trichoglossus chlorolepidotus), Toronga Zoo, Sydney, New South Wales, Australia

Martin Willis / Allied Rock Wallaby (Petrogale assimilis) mother with joey, Magnetic Island, Queensland, Australia

Martin Willis / Southern Double-collared Sunbird (Cinnyris chalybeus) on Rocket Pincushion (Leucospermum reflexum) flower, Kirstenbosch Garden, Cape Town, South Africa

Martin Willis / Impala (Aepyceros melampus) male with large antlers peering through woodland, Saint Lucia, South Africa

Martin Willis / Mountain Gorilla (Gorilla gorilla beringei) male feeding, Volcanoes National Park, Rwanda

Martin Willis / African Jacana (Actophilornis africanus) walking on floating lily pads, Mabamba Swamp, Uganda

Martin Willis / Victoria's Riflebird (Ptiloris victoriae) male displaying for female on vine lek, Malanda, Queensland, Australia

Martin Willis / Wompoo Fruit-Dove (Ptilinopus magnificus), Malanda, Queensland, Australia

Martin Willis / White-cheeked Honeyeater (Phylidonyris nigra), Cheyne Beach, Western Australia, Australia

Martin Willis / Grey-breasted Robin (Eopsaltria griseogularis) fluffing, Stirling Range National Park, Western Australia, Australia

Martin Willis / Victoria's Riflebird (Ptiloris victoriae) sub-adult male displaying at display post, Malanda, Queensland, Australia

Martin Willis / Splendid Fairywren (Malurus splendens) male, Busselton, Western Australia, Australia

Martin Willis / Sacred Kingfisher (Todirhamphus sanctus), Daintree River, Queensland, Australia

Martin Willis / Rufous Fantail (Rhipidura rufifrons), Malanda, Queensland, Australia

Martin Willis / Red-eared Firetail (Stagonopleura oculata), Busselton, Western Australia, Australia

Martin Willis / Papuan Pitta (Erythropitta macklotii), Kutini-Payamu National Park, Queensland, Australia

Martin Willis / Palm Cockatoo (Probosciger aterrimus), Kutini-Payamu National Park, Queensland, Australia

Martin Willis / Striated Grasswren (Amytornis striatus), Opalton, Queensland, Australia

Martin Willis / New Holland Honeyeater (Phylidonyris novaehollandiae), Cheyne Beach, Western Australia, Australia

Martin Willis / New Holland Honeyeater (Phylidonyris novaehollandiae) pair, Cheyne Beach, Western Australia, Australia

Martin Willis / Macleay's Honeyeater (Xanthotis macleayanus) pair, Malanda, Queensland, Australia

Martin Willis / Frilled Monarch (Arses telescophthalmus) male, Kutini-Payamu National Park, Queensland, Australia

Martin Willis / Carnaby's Black Cockatoo (Calyptorhynchus latirostris) feeding, Waychinicup National Park, Western Australia, Australia

Martin Willis / Baudin's Black Cockatoo (Zanda baudinii), Busselton, Western Australia, Australia

Martin Willis / Azure Kingfisher (Ceyx azureus), Daintree River, Queensland, Australia

Martin Willis / Black-mandibled Toucan (Ramphastos ambiguus) with predated egg at nest cavity, Costa Rica

Martin Willis / Splendid Leaf Frog (Agalychnis calcarifer), La Paz Waterfalls, Costa Rica

Martin Willis / Scarlet Macaw (Ara macao), Costa Rica

Martin Willis / Red-eyed Tree Frog (Agalychnis callidryas), La Paz Waterfalls, Costa Rica

Martin Willis / Plate-billed Mountain-Toucan (Andigena laminirostris), Andes, Ecuador

Martin Willis / Masked Flower-piercer (Diglossa cyanea), Andes, Ecuador

Martin Willis / Many-spotted Hummingbird (Taphrospilus hypostictus), Andes, Ecuador

Martin Willis / Many-banded Aracari (Pteroglossus pluricinctus), Amazon, Ecuador

Martin Willis / Many-banded Aracari (Pteroglossus pluricinctus) group, Amazon, Ecuador

Martin Willis / Long-tailed Sylph (Aglaiocercus kingi) hummingbird feeding on flower nectar, Andes, Ecuador