Patricio Robles Gil / Monarch (Danaus plexippus) butterfly, mass flying in wintering grounds, Monarch butterfly Biosphere Reserve, Michoacan, Mexico
00190826
Konrad Wothe / Red-crowned Crane (Grus japonensis) pair calling during courtship dance at their wintering grounds, Hokkaido, Japan
01612716
Karine Aigner / Biologist Clara Cooper-Mullin (left) and her colleague Olivia DaRugna. Clara is holding a Hermit thrush (Catharus guttatus), as part of her study into the migration behaviour of birds that use the isl...
01612715
Karine Aigner / Portrait of scientist Nathan Cooper holding radio-telemetry equipment to track Kirtland's warbler (Setophaga kirtlandii). Cat Island, Bahamas. April 2017.
01607415
John Chan / American wigeon (Anas americana) resting in a pond at wintering grounds, Southern California, USA, December.
01595591
Nick Upton / Common swift (Apus apus) flying overhead, having just arrived after migration from African wintering grounds, Lacock, Wiltshire, UK, May.
01595590
Nick Upton / Common swifts (Apus apus) flying over rooftops, having just arrived after migration from African wintering grounds, Lacock, Wiltshire, UK, May.
01497523
Tui De Roy / Semipalmated plover (Charadrius semipalmatus), migrant on wintering grounds, Galapagos
01523641
Gerrit Vyn / Nordmann's greenshank (Tringa guttifer) on its wintering grounds. Rakhine State, Myanmar. January. Endangered species.
01351668
Terry Whittaker / 2020VISION / Flock of Dark-bellied brent geese (Branta bernicla) flying in formation across the setting sun, Wallasea Island RSPB reserve, River Crouch, Essex, UK, March 2011. Photographer quote: 'Every winter tho...
00342743
Yva Momatiuk & John Eastcott / Whooping Crane (Grus americana) in marsh waters at wintering grounds, Aransas National Wildlife Refuge, Texas
01260684
Peter Cairns / naturepl.com / Flock of Common crane {Grus grus} in dawn mist on wintering grounds, Hornborga, Sweden, April
