Black Spiny-Tailed Iguana (Ctenosaura similis) lives in dry tropical forest across Central America. It feeds on leaves and flowers. Its conservation status is Least Concern.
Fascinating facts about the Black Spiny-Tailed Iguana
- It holds the Guinness record for the fastest lizard, reaching a top sprint of 34.6 kilometres per hour. As a diurnal and fast-moving species it relies on that burst of speed to flee predators, retreating to rock crevices or trees when threatened. If cornered it will also lash its spiny tail and bite, using both speed and aggression to survive.
- Males can grow to 1.3 m in total length, while females are slightly shorter at 0.8-1 m, making it the largest member of the genus Ctenosaura. Both sexes display a crest of long spines that runs down the centre of the back, and the tail is covered in distinctive black, keeled scales that give the species its common name.
- They eat the fruit of the manchineel tree and even inhabit its limbs, despite the tree's extreme toxicity to most animals. Their diet is mainly herbivorous, consisting of flowers, leaves, stems and fruit, though juveniles start as insectivores and shift toward plant matter as they mature. This ability to exploit a poisonous resource gives them a unique niche in their environment.
- Black spiny-tailed iguanas will opportunistically feed on small vertebrates such as fish, rodents, eggs, birds and even hatchling sea turtles. Although they are primarily herbivorous, this occasional carnivory means they can prey on vulnerable native wildlife. Their ability to thrive in both natural and disturbed habitats increases the likelihood of encounters with endangered species. Consequently, their presence is considered a potential threat to local fauna.
- After mating, females travel for eight to ten weeks before reaching a communal nesting site. At these sites they repeatedly enter the same openings and lay clutches that can contain up to 30 eggs. The eggs incubate for about 90 days before hatchlings emerge and dig out of the sand. Young iguanas reach reproductive maturity at roughly two to three years of age.
Sources
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At a glance
RangeCentral America
HabitatDry tropical forest
DietLeaves and flowers
About the Black Spiny-Tailed Iguana
In the scorching landscapes of Central America, the black spiny-tailed iguana roams with a fierce and ancient elegance, its dark, armored scales glistening like polished onyx as it navigates the rocky outcrops and sun-baked forests with a deliberate, almost regal, pace. With each deliberate step, its spiny tail thrashes back and forth, a counterbalance to its movements as it climbs, runs, and forages with a primal intensity. As it basks in the blistering sun, its eyes gleam like piercing jewels, a testament to the resilience and adaptability of this remarkable creature.
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