Etienne Littlefair / Yellow-bellied snapping turtle (Elseya flaviventralis) swimming along rock wall, Arnhem Escarpment Creek, Northern Territory, Australia. June.

Etienne Littlefair / Yellow bellied snapping turtle (Elseya flaviventralis) about to surface for air, Arnhem Escarpment Creek, Northern Territory, Australia. June.

Etienne Littlefair / Northern snapping turtles (Elseya dentata), small adult at rest amongst woody debris at the bottom of a deep creek bed in the Daly region, Northern Territory, Australia. June. Cropped.

Etienne Littlefair / Northern snapping turtle (Elseya dentata), a large adult female coming to rest on a deep creek bed, Daly region, Northern Territory, Australia. July.

Etienne Littlefair / White-throated snapping turtle (Elseya albagula), adult female with cataracts, found active, walking along the bottom of a rocky area in the Connors River, Queensland, Australia. August.

Etienne Littlefair / White-throated snapping turtle (Elseya albagula), large adult female with cataracts, found active, walking along the bottom of a deep pool in the upstream of the Mary River, Queensland, Australia. Aug...

Etienne Littlefair / Broad-shelled turtle (Chelodina expansa), adult actively moving along deep river bed, possibly foraging, Mary River, Queensland, Australia. July. Cropped.

Etienne Littlefair / Sandstone long-necked turtle (Chelodina burrungandjii) actively foraging at night, Pentecost River tributary, Western Australia. April.

Etienne Littlefair / Arnhem long-necked turtle (Chelodina burrungandjii) swimming at night, Arnhem Escarpment Creek, Northern Territory, Australia. April.

Etienne Littlefair / Fitzroy river turtle (Rheodytes leukops), adult resting under woody debris, Connors River, Queensland, Australia. August. Cropped.

Etienne Littlefair / Fitzroy river turtle (Rheodytes leukops), adult actively moving along the riverbed, Connors River, Queensland, Australia. August.

Etienne Littlefair / Fitzroy river turtle (Rheodytes leukops), adult actively moving along the riverbed, Connors River, Queensland, Australia. August. Cropped.

Etienne Littlefair / Fitzroy river turtle (Rheodytes leukops), adult actively moving along the rocky riverbed, Connors River, Queensland, Australia. August.

Etienne Littlefair / Saw-shelled turtle (Myuchelys latisternum) resting, Arnhem escarpment creek, Northern Territory, Australia. May.

Etienne Littlefair / Northern snapping turlte (Elseya dentata) about to surface for air, Katherine region, Northern Territory, Australia. June.

Etienne Littlefair / Northern red-faced turtle (Emydura victoriae) young juvenile swimming amongst submerged pandanus, Manning River, Western Australia, June. Cropped.

Etienne Littlefair / Northern red-faced turtle (Emydura victoriae) emerging from vegetation, Manning River, Western Australia. June.

Etienne Littlefair / Northern yellow-faced turtle (Emydura tanybaraga), young juvenile resting in a sheltered spot in a shallow stretch of Berry Creek, Northern Territory, Australia. Cropped.

Etienne Littlefair / Northern yellow-faced turtle (Emydura tanybaraga), adult male scared off by seeing the photographer approaching. Berry Creek, Northern Territory, Australia. May.

Etienne Littlefair / Worrell's turtle (Emydura subglobosa worrelli), large adult female resting at night, Lawn Hill Creek, Queensland, Australia. January.

Etienne Littlefair / Worrell's turtle (Emydura subglobosa worrelli), adult swimming through the darkness underneath a large overhanging creek bank, Katherine Region, Northern Territory, Australia. December.

Etienne Littlefair / Worrell's turtle (Emydura subglobosa worrelli), adult resting under aquatic vegetation, Katherine Region, Northern Territory, Australia. December.

Etienne Littlefair / Worrell's turtle (Emydura subglobosa worrelli), adult swimming through the darkness underneath a large overhanging creek bank, Katherine region, Northern Territory, Australia. December.

Etienne Littlefair / Mary river turtle (Elusor macrurus), full-sized adult male with alge-covered carapace heading for shelter under a fallen log, Mary River, Queensland, Australia. August.

Etienne Littlefair / Mary river turtle (Elusor macrurus), adult male swimming after becoming aware of the photographer, Mary River, Queensland, Australia. August.

Etienne Littlefair / Mary river turtle (Elusor macrurus), full-sized adult male walking along deep riverbed, Mary River, Queensland, Australia. August. Cropped.

Etienne Littlefair / Mary river turtle (Elusor macrurus), adult male walking along riverbed, with algae attached to his head, Mary River, Queensland, Australia. August. Cropped.

Etienne Littlefair / Mary river turtle (Elusor macrurus), juvenile resting, well-camouflaged, Mary River inland of Cambroon, Queensland, Australia. August.

Etienne Littlefair / Krefft's river turtle (Emydura macquarii krefftii), juvenile with carapace covered in algae, actively moving along riverbed of the Mary River, Queensland, Australia. August.

Etienne Littlefair / Krefft's river turtle (Emydura macquarii krefftii), adult actively moving along riverbed of the Mary River, Queensland, Australia. Cropped.

Etienne Littlefair / Gulf snapping turtle (Elseya lavarackorum), small juvenile resting near the surface, Lawn Hill Creek (Adel's Grove), Queensland, Australia. January. NOTE: small, out of focus water extraction pump...

Etienne Littlefair / Gulf snapping turtle (Elseya lavarackorum), large adult female found active in deep water on a very hot summer night, Lawn Hill Creek, Queensland, Australia. January. Cropped.

Etienne Littlefair / Irwin's turtle (Elseya irwini), large adult female returning to deeper water after surfacing for a breath, North Johnstone River, downstream of Malanda, Far North Queensland, Australia. August.

Etienne Littlefair / Irwin's turtle (Elseya irwini), juvenile resting downstream of a riffle zone, North Johnstone River, downstream of Malanda, Far North Queensland, Australia. August. Cropped.

Etienne Littlefair / Irwin's turtle (Elseya irwini), juvenile swimming through submerged vegetation downstream of a riffle zone, North Johnstone River, downstream of Malanda, Far North Queensland, Australia. August. C...

Etienne Littlefair / Irwin's turtle (Elseya irwini), adult male resting. Note the sediment disturbance to the rear of the turtle is caused by expulsion of water via cloacal respiration. North Johnstone River, downstre...

Etienne Littlefair / Irwin's turtle (Elseya irwini), large adult female found actively moving around in a deep pool of the North Johnstone River, downstream of Malanda, Far North Queensland, Australia. August. Cropped...

Etienne Littlefair / Arnhem long-necked turtle (Chelodina burrungandjii) resting, South Alligator drainage, Northern Territory, Australia. June.

Etienne Littlefair / Arnhem long-necked turtle (Chelodina burrungandjii) foraging at night, Arnhem escarpment creek, Northern Territory, Australia. April.

Etienne Littlefair / Sandstone long-necked turtle (Chelodina burrungandjii) actively foraging at night, Pentecost River, Western Australia. April.

Etienne Littlefair / Saw-shelled turtle (Myuchelys latisternum), adult female resting, Townsville region, Queensland, Australia. September. Cropped. NOTE: some backscatter caused by photographer has been cloned out.

Etienne Littlefair / Worrell's turtle (Emydura subglobosa worrelli), sub-adult sized turtle resting on a submerged log underneath an overhanging creek bank, Katherine region, Northern Territory, Australia. December.

Etienne Littlefair / Gulf snapping turtle (Elseya lavarackorum), large adult female found active in deep water on a very hot summer night, Lawn Hill Creek, Queensland, Australia. January. Cropped.

Etienne Littlefair / Northern snapping turtles (Elseya dentata), small adult and a juvenile hiding under vegetation, Daly region, Northern Territory, Australia. June.