Chordata

Acanthurus achilles (Achilles Tang)

Illustration of Achilles Tang (Acanthurus Achilles)

Acanthurus lineatus (Striped Surgeon Fish)

Illustration of a Striped Surgeon Fish (Acanthurus Lineatus)

Acanthurus nigrofuscus (Brown Surgeonfish)

Illustration of a Brown Surgeonfish (Acanthurus Nigrofuscus)

Acanthurus triostegus (Convict Tang)

Illustration of Convict Tang (Acanthurus Triostegus)

Acipenser oxyrinchus (Atlantic Sturgeon)

Illustration of Acipenser oxyrinchus (Atlantic Sturgeon)

Acridotheres tristis (Common Myna)

Illustration of Acridotheres tristis (Common Myna), which is an invasive pest in South Africa, North America, the Middle East, Australia, New Zealand and many Pacific islands as it out-competes native hollow-nesting bird species

Aegolius acadicus (Northern Saw-whet Owl)

Illustration of Aegolius acadicus (Northern Saw-whet Owl)

Agelaius phoeniceus (Red-winged Blackbird)

Illustration of Agelaius phoeniceus (Red-winged Blackbird)

Ailuropoda melanoleuca (Panda)

Illustration of Ailuropoda melanoleuca (Panda)

Alces alces (Moose)

Illustration of Alces alces (Moose)

Aldrichetta forsteri (Yellow-eye Mullet)

Illustration of Aldrichetta forsteri (Yellow-eye Mullet)

Alligator mississippiensis (American Alligator)

Illustration of Alligator mississippiensis (American Alligator)

Alosa aestivalis (Blueback Herring)

Illustration of Alosa aestivalis (Blueback Herring)

Alosa mediocris (Hickory Shad)

Illustration of Alosa mediocris (Hickory Shad)

Alosa pseudoharengus (Alewife)

Illustration of Alosa pseudoharengus (Alewife)

Alosa sapidissima (American Shad)

Illustration of Alosa sapidissima (American Shad)

Ambystoma maculatum (Spotted Salamander)

Illustration of Ambystoma maculatum (Spotted Salamander)

Ammodramus maritimus (Seaside Sparrow)

A side view of a Seaside Sparrow

Ammodramus nelsoni (Nelson's Sparrow)

A side view of a Nelson's Sparrow. Nelson's sparrow and the saltmarsh sparrow were considered to be a single species, the sharp-tailed sparrow; because of this it was briefly known as Nelson's sharp-tailed sparrow

Ammodytes dubius (Northern Sand Lance)

Illustration of Ammodytes dubius (Northern Sand Lance)

Amniataba caudavittata (Yellowtail trumpeter)

Illustration of Amniataba caudavittata (Yellowtail trumpeter)

Amphiprion spp. (Clownfish)

Illustration of Amphiprion spp. (Clownfish)

Anas penelope (Eurasian Wigeon)

Illustration of Anas penelope (Eurasian Wigeon)

Anas platyrhynchos (Mallard Duck)

Illustration of Anas platyrhynchos (Mallard Duck)

Anas rubripes (American Black Duck)

Illustration of Anas rubripes (American Black Duck)

Anchoa mitchilli (Bay Anchovy)

Illustration of Anchoa mitchilli (Bay Anchovy)

Anchoa mitchilli (Bay Anchovy) : juvenile

Illustration of Anchoa mitchilli (Bay Anchovy) juvenile

Anguilla rostrata (American Eel)

Illustration of Anguilla rostrata (American Eel)

Anguilla rostrata (American Eel) : elver

Illustration of Anguilla rostrata (American Eel) elver

Anguilla rostrata (American Eel) : glass eel

Illustration of Anguilla rostrata (American Eel) glass eel

Anguilla rostrata (American Eel) : leptocephalus

Illustration of Anguilla rostrata (American Eel) leptocephalus

Anguilla rostrata (American Eel) : silver

Illustration of Anguilla rostrata (American Eel) : silver

Anguilla rostrata (American Eel) : yellow

Illustration of Anguilla rostrata (American Eel) : yellow

Anseranas semipalmata (Magpie Goose) 1

Illustration of Anseranas semipalmata (Magpie Goose)

Anseranas semipalmata (Magpie Goose) 2

A waterbird species found in coastal northern Australia. The adult Magpie goose has black and white feathers, a long neck and a cranial knob (smaller in females). They also have orange legs with partly webbed feet, and a red beak with a white hook on the end which assists them in probing for food. The Northern Territory holds the largest populations and breeding areas of the Magpie goose with an estimated population of over 2 million individuals

Antilocapra americana (Pronghorn deer)

Side view of male pronghorn

Antilope cervicapra (Blackbuck Antelope)

Illustration of Antilope cervicapra (Blackbuck Antelope)

Anura (Frog) lifecycle: day 01 egg

Illustration of Anura (Frog) lifecycle: day 01 egg

Anura (Frog) lifecycle: day 03-04 tailbud

Illustration of Anura (Frog) lifecycle: day 03-04 tailbud

Anura (Frog) lifecycle: day 06 tadpole with external gills

Illustration of Anura (Frog) lifecycle: day 06 tadpole with external gills