Murray Cooper / Barred Hawk (Leucopternis princeps) with snake prey, Ecuador

Murray Cooper / Barred Hawk (Leucopternis princeps) with snake prey, Andes, Ecuador

Murray Cooper / White Hawk (Leucopternis albicollis), Ecuador

Pete Oxford / White Hawk (Leucopternis albicollis) portrait, Ecuador

Michael & Patricia Fogden / White Hawk (Leucopternis albicollis) flying over rainforest, Costa Rica

Thomas Marent / Black-faced Hawk (Leucopternis melanops), Putumayo, Colombia

Murray Cooper / Barred Hawk (Leucopternis princeps) with chick and snake prey at nest, Andes, Ecuador

Murray Cooper / Barred Hawk (Leucopternis princeps) with chick and snake prey in nest, Andes, Ecuador

Tim Laman / Slate-coloured hawk (Leucopternis schistaceus) perched on branch feeding on frog prey, Yasuni National Park, Orellana Province, Ecuador.

Roland Seitre / Grey-backed hawk (Leucopternis occidentalis) perched on branch, Buenaventura Reserve Jocotoco, Machala, Ecuador. Endangered.

Roland Seitre / White hawk (Leucopternis albicollis) perched in tree, Costa Rica.

Roland Seitre / Barred hawk (Leucopternis princeps) standing on ground, Zoo Ave, La Garrita, Costa Rica. Captive.