Nigel Cattlin / Large rose sawfly (Arge pagana) larvae feeding on ornamental rose leaves in summer, Berkshire, September

Willi Rolfes/ BIA / Alpine Marmot (Marmota marmota) alarm calling, Hohe Tauern National Park, Austria

Jeff Foott / American Pika (Ochotona princeps) alarm calling, Bridger-Teton National Forest, Wyoming

Sandesh Kadur / Speckled mousebird (Colius striatus), two perched in tree. Lake Manyara National Park, Tanzania.

Tui De Roy / Blue-footed booby (Sula nebouxii) alarmed, on nest with chick and egg. Punta Suarez, Espanola Island, Galapagos.

David Perpinan / Great rufous woodcreeper (Xiphocolaptes major) startled whilst incubating eggs, Pantanal, Mato Grosso do Sul, Brazil.

Joao Burini / Tropical screech owl (Megascops choliba), Intervales State Park, Sao Paulo, Atlantic Forest South-East Reserves, UNESCO World Heritage Site, Brazil.

Ernie Janes / Asian leopard cat (Prionailurus bengalensis) with surprised expression, captive, occurs in South East Asia.

Jen Guyton / Nile crocodile (Crocodylus niloticus) with Great white pelican (Pelecanus onocrotalus) prey. Other pelicans flying or wings held up in alarm. Msicadzi River, Gorongosa National Park, Mozambique. Duri...

Jen Guyton / Nile crocodile (Crocodylus niloticus) with Great white pelican (Pelecanus onocrotalus) prey. Other pelicans with wings held up in alarm. Msicadzi River, Gorongosa National Park, Mozambique. During th...

Roger Powell / Flock of Eurasian wigeon (Anas penelope) taking flight in alarm. Druridge Pools Nature Reserve, Northumberland, England, UK, January

Roger Powell / Flock of Eurasian wigeon (Anas penelope) taking off in alarm. Druridge Pools Nature Reserve, Northumberland, England, UK, January