Saltwater Crocodile
(Crocodylus porosus)

Habitat: found around freshwater lakes, tidal rivers, wetlands, and marshes as well as in brackish waters along coasts; basks and nests on land

Behavior/Rhythm: territorial and social, with a wide range of vocal sounds, including purring and roaring; hunts at night; aggressive toward humans; long-lived

Feeding: carnivorous; eats fish, mammals, wading birds, goannas, dingoes, amphibians, turtles, insects, and carrion

Breeding: establishes breeding territories; females reach sexual maturity before males, around ten to 12 years old; during the wet season 40 to 60 eggs are laid in a nest made from plants and mud; each egg weighs about 4 ounces (100 grams) and hatches after three months; temperature of the incubating egg determines sex of hatchling; high level of mortality for eggs and hatchlings

Size: females measure eight to ten feet (three meters) long; males reach 16 feet (5 meters), but some males can reach 23 feet (7 meters); weight varies by length, but on average 880 to 2,200 pounds (400 to 1,000 kilograms)

Status: lower risk, least concern; effectively managed in Australia but remains on the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) list because of its status in other countries

Gould's Goanna
(Varanus gouldii)

Habitat: found along coastal plains, forests, deserts; prefers open woodlands with sandy soils

Behavior/Rhythm: diurnal; lives on ground in burrows

Feeding: hunts by smell; kills and scavenges food; eats reptiles, small mammals, insects

Breeding: lays five to ten eggs with average length of 0.8 inches (2 centimeters); eggs take a little less than nine months to hatch

Size: can reach up to 5.3 feet (1.6 meters) in length but averages 3.3 feet (one meter); on average, males weigh 15.4 pounds (7 kilograms) and females weigh 10.4 pounds (4.7 kilograms)

Status: not listed

Dingo
(Canis lupus dingo)

Habitat: extremely versatile; occupies diverse habitats from mountains to deserts, wetlands, and forests

Behavior/Rhythm: social; forms small groups that stick to home territory, which can be as large as 116 square miles (300 square kilometers); howls in packs; oldest known lived to 15 years

Feeding: carnivorous; eats small rodents and marsupials, birds, goannas, wallabies, eggs, and carrion

Breeding: breeds once a year with gestation period of about two months; five pups born in average-size litter; both parents care for young; young become independent at three to six months but may stay with pack for one year

Size: height 17 to 24 inches (43 to 61 centimeters); length (head and body) 2.8 to 3.3 feet (0.85 to one meter); tail 10 to 14 inches (26 to 36 centimeters); weight 29 to 33 pounds (13 to 15 kilograms)

Status: vulnerable; populations threatened from inbreeding with domestic dogs

Agile Wallaby
(Macropus agilis)

Habitat: found in tropical coastal Australia in range of habitats from grassy forests to woodlands; often near rivers; rarely found in hilly habitats

Behavior/Rhythm: gregarious; forms groups that shelter together in woodlands during day; emerges early in morning and late in day to feed; at Mamukala can be seen in areas where grasses are growing on land exposed by receding waters later in dry season

Feeding: grazes on grasses and plants; will eat fruit

Breeding: breeds all year long; usually has one young that stays in pouch for about four and a half months; reaches independence when one year old

Size: height about three feet (one meter); length (head and body) 2.4 feet (0.73 meters) for females and 2.8 feet (0.85 meters) for males; tail length 2.3 feet (0.70 meters) for females and 2.8 feet (0.85 meters) for males; weight as much as 33 pounds (15 kilograms) for females and as much as 60 pounds (27 kilograms) for males

Status: lower risk; least concern

Magpie Goose
(Anseranas semipalmata)

Habitat: shallow wetlands and grasslands along river floodplains

Behavior/Rhythm: gregarious; forms small parties to large flocks; wades and swims; at Kakadu migrates locally between breeding areas on floodplains during the wet season and freshwater wetlands during the dry season; large numbers arrive at Mamukala each dry season and can be seen leaving the area every night to roost in woodland trees; very loud

Feeding: eats grasses and seeds; will dig for bulbs and roots using bill

Breeding: not monogamous but usually cares for young in groups consisting of one male and two females; breeds in colonies; builds nests on floating mounds of vegetation or in trees over water; clutch averages seven eggs; both parents care for young

Size: length 28 to 35 inches (70 to 90 centimeters); wingspan 5 feet (1.5 meters); weight 4.4 pounds (2 kilograms) for female, 6.2 pounds (2.8 kilograms) for male

Status: least concern

Whistling Kite
(Haliastur sphenurus)

Habitat: wetlands, open areas, woodlands

Behavior/Rhythm: solitary or gregarious; a resident species in western and northern Australia, but migratory in parts of its range

Feeding: opportunistic feeder on carrion as well as small mammals, birds, insects, and fish; feeds in large numbers on edges of brushfires

Breeding: pairs are considered monogamous; builds nest made of sticks and lined with grasses in tall trees; lays one to three eggs; eggs incubated for about five weeks; chicks fledge when about seven weeks old; both parents care for young

Size: length 22 inches (55 centimeters) with tail about half the length; wingspan 47 to 57 inches (120 to 145 centimeters); weight 1.4 pounds (0.64 kilograms) for males, 1.9 pounds (0.86 kilograms) for females

Status: least concern

Plumed Whistling Duck
(Dendrocygna eytoni)

Habitat: seen around water (wetlands, flooded areas, mangroves) during day but spends night in grasslands or on edge of wetlands

Behavior/Rhythm: stays in groups during the day; travels to grasslands at night to feed; forms dense flocks with up to thousands of birds; can be noisy; birds seen at freshwater wetlands like Mamukala during the dry season; will form flocks with wandering whistling ducks

Feeding: feeds around water but does not dive for food; eats grasses, herbs, sedges, seeds, and grains

Breeding: scrapes out nest away from water in grassland; lines nest with vegetation; usually lays 8 to 14 eggs during the wet season, but this can vary; eggs incubated for about a month; both parents care for young

Size: length 17 to 24 inches (42 to 62 centimeters); weight 2.2 pounds (one kilogram) with males larger than females

Status: least concern

Wandering Whistling Duck
(Dendrocygna arcuata)

Habitat: subcoastal plains along wetlands, lagoons, and flooded grasslands

Behavior/Rhythm: stays in groups during day; feeds in flocks; forms dense flocks with as many as thousands of birds; noisy; can be seen in flocks with plumed whistling ducks

Feeding: dives into water for food; eats grasses, herbs, aquatic vegetation, sedges, seeds, and grains

Breeding: builds nest lined with grasses in ground or under vegetation; breeds January to April, lays 6 to 15 eggs; eggs incubated for about a month

Size: length 22 to 24 inches (55 to 61 centimeters); weight 1.6 pounds (0.73 kilograms)

Status: least concern

Little Corella
(Cacatua sanguinea)

Habitat: found around water and surrounding open country, grasslands, and mangroves

Behavior/Rhythm: forms large flocks but can be seen in pairs; can be found in flocks in trees or on the ground; noisy

Feeding: feeds in flocks on grains, grasses, and some fruits and bulbs

Breeding: monogamous; builds nest in hollow tree; lays two to four eggs; eggs incubated for three weeks; both parents care for young

Size: length 14 to 16 inches (36 to 40 centimeters); weight one pound (0.45 kilograms)

Status: least concern

Comb-Crested Jacana
(Irediparra gallinacea)

Habitat: wetlands, estuaries, and coastal areas

Behavior/Rhythm: seen alone or in pairs as well as in groups; noisy; will migrate with changing environmental conditions

Feeding: eats aquatic insects and seeds from aquatic plants

Breeding: breeds from February to March; male builds nest from floating vegetation at water level; average of four eggs in clutch; male incubates eggs and takes care of young; females mate with more than one male, but pairs do form bonds

Size: length 8 to 9 inches (20 to 23 centimeters); weight 5.3 ounces (150 grams)

Status: least concern

Black-Necked Stork
(Ephippiorhynchus asiaticus)

Habitat: coastal and near-coastal wetlands including mudflats; can be found on irrigated land and floodplains

Behavior/Rhythm: found alone or in pairs but will occasionally form larger groups

Feeding: eats fish, amphibians, and crustaceans

Breeding: forms pair bonds and breeds from March to May; builds nest made of large pile of sticks and grasses in tree; lays two to four eggs; both parents care for young

Size: length 4 to 4.5 feet (1.3 to 1.4 meters); wingspan about 7 feet (2 meters); weight about 13 pounds (6 kilograms)

Status: near threatened