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Cuvier's Dwarf Caiman vs Smooth-fronted Caiman

Cuvier's Dwarf Caiman
VS
Smooth-fronted Caiman

Cuvier's dwarf caiman and the smooth-fronted caiman are the two dwarf caimans in the genus Paleosuchus, small, heavily armoured crocodilians of South American forests.

Cuvier's Dwarf Caiman Smooth-fronted Caiman
Scientific name Paleosuchus palpebrosus Paleosuchus trigonatus
Size The smallest living crocodilian, with males around 1.5 metres long and females smaller Grows to around 2 metres, a little larger than Cuvier's dwarf caiman
Forehead A short, high, domed snout with a bony ridge between the eyes, and dark eyes A smooth, flat forehead without the bony ridge, and a dark, nearly black body
Armour Thick bony plates on the back and belly, which protect it from predators such as jaguars and anacondas Thick bony plates on the back and belly, which protect it from predators
Habitat Prefers fast-flowing rainforest streams and rocky rivers over still lakes Lives in slow, dark forest streams and flooded forest, and can wander across the forest floor
Behaviour Shy and mostly nocturnal, spending the day in burrows or under overhanging banks The female builds a mound nest of leaf litter and soil on land, sometimes using termite mounds, and guards it
Range The Amazon and Orinoco basins, the Pantanal, and parts of the Paraguay and Parana rivers The Amazon and Orinoco basins and the Guiana Shield
Conservation status Least Concern, though forest loss and gold-mining pollution affect local populations Least Concern, though forest loss and gold-mining pollution affect local populations

Cuvier's Dwarf Caiman vs Smooth-fronted Caiman: common questions

Which dwarf caiman is smaller?

Cuvier's dwarf caiman, which is the smallest living crocodilian, with males around 1.5 metres long.

How can you tell them apart?

Cuvier's dwarf caiman has a domed snout with a bony ridge between the eyes, while the smooth-fronted caiman has a flat, smooth forehead.

Which one nests on the forest floor?

The smooth-fronted caiman, whose female builds a mound nest of leaf litter and soil, sometimes using termite mounds.

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