Caiman latirostris (Daudin, 1801)

Adult Size and Weight

In the wild, adult broad-snouted caimans (Caiman latirostris) normally grow to 2 to 2.5 m (6 ft 7 in to 8 ft 2 in) in length, while a small number of older males have been recorded reaching up to 3.5 m (11 ft). Captive adult broad-snouted caimans weigh between 23 and 65 kg (51 to 143 lb), and a large 2.6 m (8 ft 6 in) adult male typically weighs around 80 kg (180 lb).

Coloration

Most individuals are light olive-green, and a small number have spots on their faces.

Snout Trait

The species' most notable physical trait is its broad snout, which the species' common name references. This broad snout is well adapted to cutting through dense marsh vegetation, and as a result, caimans swallow some of this vegetation while foraging for food.

Clutch Size

Female broad-snouted caimans lay 18 to 50 eggs per clutch. While uncommon, single nests have been found holding up to 129 eggs, which is thought to come from multiple females laying in the same nest.

Egg Laying Pattern

The eggs are laid in two distinct layers, which have a small temperature difference between them. This temperature difference produces a more even ratio of male to female offspring.

Temperature-Dependent Sex Determination

Unlike many animals, broad-snouted caimans do not have sex chromosomes; instead, the sex of developing offspring is determined by incubation temperature. Eggs incubated at warmer temperatures of 32 °C (90 °F) or higher develop into males, while eggs incubated at cooler temperatures of 31 °C (88 °F) or lower develop into females.

Additional Sex Determinants

The mother's estrogen and stress levels can also affect offspring sex. Nests incubated at the same temperature can still have different sex ratios, which shows that additional factors also contribute to the final sex ratio of a nest.