Nick Upton / Adult Herring gull (Larus argentatus) scavenging left over food, St.Ives, Cornwall, UK, June. Editorial use only.

Ole Jorgen Liodden / Northern raven (Corvus corax) in flight, Smola, Norway

Bruno D'Amicis / Dead eurasian cranes (Grus grus) juvenile hanging as scarecrow in cultivated fields on shores. Shesher lake, Fogera Plains. Lake Tana Biosphere Reserve

Ernie Janes / Scarecrow in vegetable garden at village Garden Allotments, Norfolk, UK

Tui De Roy / Black-backed Jackal (Canis mesomelas) trying to scare away Ruppell's Griffons (Gyps rueppellii) from male Grant's Gazelle (Nanger granti) carcass, Ol Pejeta Conservancy, Kenya

Juergen Freund / Naked child lying on a rock in the sun next to a river in Banaue Rice Terraces, Philippines. To the left, a device can be seen that uses water to pull a long line going up to the ricefields to wave a...

Jack Dykinga / Murmuration of Red winged blackbird (Agelaius phoeniceus) with some Yellow headed blackbirds (Xanthocephalus xanthocephalus) flying in tight formation scaring off Snow geese (Chen caerulescens) Cibola...

Jack Dykinga / Murmuration of Red winged blackbird (Agelaius phoeniceus) with some Yellow headed blackbirds (Xanthocephalus xanthocephalus) flying in tight formation scaring off Snow geese (Chen caerulescens) Cibola...

Jack Dykinga / Yellow headed blackbird (Xanthocephalus xanthocephalus) gathered in murmurations to confuse predators. Whitewater Draw wildlife refuge, Arizona, USA.

Jack Dykinga / Yellow headed blackbird (Xanthocephalus xanthocephalus) gathered in murmurations to confuse predators. Whitewater Draw wildlife refuge, Arizona, USA.

Jack Dykinga / Yellow headed blackbird (Xanthocephalus xanthocephalus) gathered in murmurations to confuse predators. Whitewater Draw wildlife refuge, Arizona, USA.