63 species

An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime environments. They are subject both to marine influences—such as tides, waves, and the influx of saline water—and to riverine influences—such as flows of fresh water and sediment. The mixing of sea water and fresh water provide high levels of nutrients both in the water column and in sediment, making estuaries among the most productive natural habitats in the world. Most existing estuaries formed during the Holocene epoch with the flooding of river-eroded or glacially scoured valleys when the sea level began to rise about 10,000–12,000 years ago.

Egyptian Goose
Alopochen aegyptiacus
Bald Eagle
Haliaeetus leucocephalus
Nile Crocodile
Crocodylus niloticus
Finless Porpoise
Neophocaena phocaenoides
Grey Heron
Ardea cinerea
Australian Saltwater Crocodile
Crocodylus porosus
Golden Eagle
Aquila chrysaetos
American Flamingo
Phoenicopterus ruber
Belted Kingfisher
Megaceryle alcyon
African Clawless Otter
Aonyx capensis
North American River Otter
Lontra canadensis
Malachite Kingfisher
Corythornis cristatus
Greater Flamingo
Phoenicopterus roseus
Great Blue Heron
Ardea herodias
Fairy Tern
Sternula nereis
American White Pelican
Pelecanus erythrorhynchos
Harbour Porpoise
Phocoena phocoena
Giant Kingfisher
Megaceryle maxima
Snow goose
Chen caerulescens
Harbor Seal
Phoca vitulina
American Crocodile
Crocodylus acutus
Black-Necked Swan
Cygnus melancoryphus
Black-Crowned Night Heron
Nycticorax nycticorax
Green Heron
Butorides virescens
Little Blue Heron
Egretta caerulea
Least Tern
Sternula antillarum
Common Tern
Sterna hirundo
Brown Pelican
Pelecanus occidentalis
Royal Tern
Thalasseus maximus
West Indian Manatee
Trichechus manatus
Roseate Tern
Sterna dougallii
Black Tern
Chlidonias niger
Bowhead Whale
Balaena mysticetus
Marsh Mongoose
Atilax paludinosus
Common Snapping Turtle
Chelydra serpentina
Diamondback Terrapin
Malaclemys terrapin
River Cooter
Pseudemys concinna
Neotropical River Otter
Lontra longicaudis
African Fish Eagle
Haliaeetus vocifer
Alabama Red-Bellied Turtle
Pseudemys alabamensis
White-Bellied Sea Eagle
Haliaeetus leucogaster