Bence Mate / Little egret (Egretta garzetta) and Grey herons (Ardea cinerea) reflected in lake at twilight, Lake Csaj, Pusztaszer, Hungary. June. Winner of the Portfolio category of the Terre Sauvage Nature Images...

Barry Mansell / Little blue heron (Egretta caerulea) North Florida, USA, October.

George Sanker / Little blue heron (Egretta caerulea) in flight. Myakka River State Park, Florida, USA. March.

Staffan Widstrand / Wild Wonders of China / Little egret (Egretta garzetta) flyingagainst blue sky in East Lake Greenway park, Wuhan, Hubei, China

Angelo Gandolfi / Bare-throated tiger heron (Tigrisoma mexicanum) and Little blue heron (Egretta caerulea) fishing in Rio Claro river, Corcovado National Park. Osa, Costa Rica.

Tim Laman / Little blue heron (Egretta caerulea) foraging at low tide in the Orinoco River Delta, Venezuela.

Ingo Arndt / Little blue heron (Egretta caerulea) fishing, Sanibel Island, Florida, USA, January.

Claudio Contreras / Little blue heron (Egretta caerulea) Laredo Borderlands, Texas, USA. April

Ernie Janes / Little blue heron (Egretta caerulea) in lagoon, Fort Myers Beach, Gulf Coast, Florida, USA, March.

Ernie Janes / RF- Little blue heron (Egretta caerulea) and Great egret (Ardea alba) in lagoon at sunrise. Fort Myers beach, Gulf Coast, Florida, USA, March. (This image may be licensed either as rights managed or r...

Ernie Janes / Little blue heron (Egretta caerulea) in lagoon at sunrise, Fort Myers Beach, Gulf Coast, Florida, USA, March.

Ernie Janes / Little blue heron (Egretta caerulea) in lagoon, Fort Myers Beach, Gulf Coast, Florida, USA, March.

Lynn M Stone / Bird watcher in a kayak with Tricoloured Heron, (Egretta tricolor) and Little Blue Heron (Egretta caerulea) Myalka River State Park, Sarasota, Florida , USA, August 2014.

David Tipling / Little Egret (Egretta garzetta) in flight, Cley Marshes Reserve, Norfolk, England, UK, March.

Stephen Dalton / Little blue heron (Egretta caerulea) with frog prey, Florida, USA, February.

Visuals Unlimited / Little Blue Heron (Egretta caerulea), South Texas, USA.

Visuals Unlimited / Little Blue Heron (Egretta caerulea) with fish in bill, South Texas, USA.

Lynn M Stone / Little Blue Heron (Egretta caerulea) with a caught invertebrate in its beak. Tampa Bay, Florida, USA, November.

Daniel Heuclin / Little Blue Heron (Egretta caerulea) walking through long grass. Everglades National Park, Florida, November.

Rolf Nussbaumer / Little Blue Heron (Egretta caerulea) walking in long grass of marshland, Fennessey Ranch, Refugio, Coastal Bend, Texas Coast, USA

Rolf Nussbaumer / Little Blue Heron (Egretta caerulea) walking in long grass of marshland, Fennessey Ranch, Refugio, Coastal Bend, Texas Coast, USA

Tim Laman / Juvenile Little blue heron (Egretta caerulea) takes flight from a mangrove tree, Caroni Bird Sanctuary, Caroni Swamp, Trinidad.

Tim Laman / Early morning light illuminates a wall of Red mangroves (Rhizophora mangle) at the edge of a lagoon in Caroni Swamp. A single juvenile little blue heron (Egretta caerulea) perches in the mangroves. C...

Tim Laman / Early morning light illuminates a wall of Red mangroves (Rhizophora mangle) at the edge of a lagoon in Caroni Swamp. A single juvenile little blue heron (Egretta caerulea) perches in the mangroves. C...

George McCarthy / Little Blue Heron {Egretta caerulea} Everglades NP, Florida, USA

John Cancalosi / Little blue heron (Egretta caerulea) calling in tree, Louisiana, USA

Tom Vezo / Little blue heron {Egretta caerulea} perching on branch, Florida, USA

Lynn M Stone / Little blue heron {Egretta caerula} Florida, USA.

Rolf Nussbaumer / Little blue heron {Egretta caerulea} on water lettuce, Florida, USA

John Cancalosi / Little blue heron {Egretta caerulea} Louisiana, USA

John Cancalosi / Little blue heron {Egretta caerulea} with frog prey. Louisiana, USA

Steven David Miller / Little blue heron {Egretta caerulea} with dragonfly in beak, SW Florida, USA

Tom Vezo / Little blue heron perched {Egretta caerulea} Florida, USA.

Bernard Castelein / Little blue heron {Egretta caerulea} Sanibel Is, Florida

Greg Basco/ BIA / Little Blue Heron (Egretta caerulea) in wetland, Limon, Costa Rica

Ron Bielefeld/ BIA / Little Blue Heron (Egretta caerulea) calling, Florida

Ingo Arndt / Little Blue Heron (Egretta caerulea) foraging, Sanibel Island, Florida

Glenn Bartley / Little Blue Heron (Egretta caerulea), Texas

Jan Wegener / Little Blue Heron (Egretta caerulea), Florida

Jan Wegener / Little Blue Heron (Egretta caerulea), Florida

Jan Wegener / Little Blue Heron (Egretta caerulea), Florida

Tom Vezo / Little Blue Heron (Egretta caerulea), Florida

Tom Vezo / Little Blue Heron (Egretta caerulea), Florida

Tom Vezo / Little Blue Heron (Egretta caerulea) on nest, Rio Grande Valley, Texas

Tom Vezo / Little Blue Heron (Egretta caerulea) on nest, Rio Grande Valley, Texas

Tom Vezo / Little Blue Heron (Egretta caerulea) on nest, Rio Grande Valley, Texas

Steve Gettle / Little Blue Heron (Egretta caerulea) foraging, Fort Myers Beach, Florida

Steve Gettle / Little Blue Heron (Egretta caerulea) flying, Fort Myers Beach, Florida