Cuban night lizard

The Cuban night lizard, scientifically known as Cricosaura typica, is a small reptile endemic to the southern coast of Cuba. It holds a unique position as the sole species within its genus, Cricosaura, and is one of three genera belonging to the night lizard family, Xantusiidae. Physically, it is distinguished by its small size, with a snout-vent length measuring less than 4 cm, making it the smallest among the night lizards. Key distinguishing features include having two frontonasal scales, a single frontal scale, the absence of a parietal scale, and a fourth finger composed of four phalanges. The name 'Cricosaura' itself is derived from Greek words meaning 'ring lizard,' possibly referencing its caudal scales, while 'typica' signifies 'typical'.

Habitat and Distribution

This xerophilic species thrives in the arid forests and woodlands found in the westernmost regions of Cuba's southernmost coast, specifically within the Granma and Santiago de Cuba provinces. It can be found at elevations up to 200 meters. The Cuban night lizard prefers microhabitats that retain some moisture, often seeking shelter beneath rocks, stones, logs, and other debris. Despite its secretive nature, it is reported to be quite common within its specific habitat and can be collected during daylight hours. Its locomotion in loose soil is characterized by snake-like wiggling and head movements.

Diet and Reproduction

The diet of the Cuban night lizard primarily consists of insects, with a notable preference for ants. It also supplements its diet with other small arthropods, including spiders and diplopods, as well as molluscs like snails and slugs. A significant characteristic that sets Cricosaura typica apart from other night lizards is its reproductive method; it is the only oviparous species within the Xantusiidae family. Eggs are typically laid between April and June. The eggs are white, measuring between 9.4 to 10.7 mm in length, and undergo an incubation period that can last up to 60 days. Hatchlings emerge measuring approximately 15 mm from snout to vent.

Conservation and Lifespan

The Cuban night lizard is categorized as Vulnerable on Cuba's Red List. The primary threats to its survival stem from habitat fragmentation and loss, largely due to human activities such as farming, deforestation, and the occurrence of fires. The introduction of invasive alien animal species and adverse natural events also pose risks to its populations. While some populations reside within protected areas, the study and management of the species are considered inadequate. Populations outside these protected zones are particularly vulnerable. In captivity, the Cuban night lizard has a documented lifespan of up to 2 years and 11 months, though its natural lifespan in the wild is less precisely recorded.