Dwarf Caiman

Paleosuchus palpebrosus

Reptile

Transcript:

Today on Animal Fact Files we’re discussing dwarf caimans. These crocodilians are also known as musky caimans and smooth fronted caimans - a name they share with the second smallest caiman species. The name dwarf caiman comes from their small stature. As adults, males are larger than females. The ladies reach about four feet (1.2m) in length while the lads reach five feet (1.5m) and potentially a bit longer according to some sources. In weight they average thirteen pounds (6kg). In fact, the dwarf caiman is the smallest crocodilian alive today!

The name smooth fronted caiman comes from their smooth face, especially when compared to the rest of their body. Dwarf caimans have thick skin covered in bony plates, called osteoderms. These osteoderms help protect this small reptile from threats. Some compare these bony plates to the shell of a turtle for how much protection they provide. Dwarf caimans are most vulnerable during their younger years of life and as eggs when predators such as rats, opossums, snakes, herons, and more will eat them. Adults have fewer threats but are still taken by anacondas, jaguars, and even other caimans.

Dwarf caimans are most active at night, and even then they don't move around much. Their mottled coloring and still posture helps them blend in with their surroundings. They live in the Amazon and Orinoco river basins of South America. They inhabit fast moving waters as well as flooded grasslands. These reptiles have a preference for cool, clean, flowing water, but they have also been observed in nutrient poor areas with still waterways. In fact, the dwarf caiman can tolerate lower temperatures than most other crocodilians. Anything as low as 43 degrees Fahrenheit (6 degrees Celsius) is fair game for a dwarf caiman!

Aside from rivers and streams, dwarf caimans also crawl up on land. They spend most of the day basking in the sun. They have also been observed in burrows. These are generally solitary animals, though they come together to mate. Males make calls to entice females. They’re aggressive and defend a territory year round. This territory gives them access to females, nesting sites, and foraging areas. Some have to travel over land to find suitable sites to defend. When they mate depends on the location. Something to note about dwarf caimans is that the female actually mounts the male!

Females dig their nests on land and include rotten and fresh leaves. Five to 25 eggs are laid and covered up in the mound. They take 90 days to incubate and, like many other reptiles, the temperature in the nest determines the sex of the babies. The female helps the babies dig themselves out when she hears their calls. She'll remain with them to keep them protected. They won't leave the nest for a few days, and they may stay with their mother for upwards of 21 months before departing according to some sources. If they can survive to adulthood, they begin breeding at about ten years of age, though this is more dependent on size. In the wild, they can live 20 to 40 years.

Supposedly, dwarf caimans produce a substance from their cloacal glands that has a rosy scent, so apparently some buttholes do smell like roses. We couldn't necessarily find any reason why this is, but it does leave us wondering if this is why they have the other common name, musky caiman. Please leave a comment if you have more information on this!

Dwarf caimans eat a variety of prey. These include insects, fish, frogs and their tadpoles, small mammals, snails, and more! They have stones in their stomach to help break down their food and their stomachs are considered some of the most acidic of all vertebrates!

Though caimans look like alligators, one of their key differences is that alligators have a bony spectrum dividing their nose holes; caimans don’t have this! We discussed this further in our caiman episode if you want to check that out!

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