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4.0 kg (8.8 lb), on average*
|2.9 kg (6.4 lb), on average
|Length (snout to vent)
||45.0 cm (1.5 ft), on average
||41.3 cm (1.4 ft), on average
|| about 60 cm (2.0 ft)
*Maximum weight: 8-10 kg (17-22 lb); one of largest species of Cyclura
Weight data from Lazell (2005); Carey (1975) as cited in Lemm and Alberts (2012).
- A large and stout iguana with dusty brown back legs/sides; dorsal spines can be brilliant turquoise blue.
- Spines along back are small, especially in females.
- Juveniles more colorful; body green or blue-green with row of black chevrons.
- Physical traits of C. pinguis are "most generalized" of the iguanas (Lazell 2005)
- Individuals on Guana Island (where they've been introduced) weigh more than those of the same body length on other islands (Lazell 2005)
- Food limitation may be influencing the Anegada population
- Other translocated species studied have shown faster growth rates (sexually mature at 2-4 yrs. rather than 6-7 yrs) but not larger size at maturity (Gerber & Alberts 2005)
- Pronounced sexual dimorphism; males larger than females.
Other Physical and Physiological Characteristics
- Pleurodont (teeth fused to the inner side of the jaw bones; in contrast to acrodont dentition on outer rim of jaw for other lizards)
- Iguanas in general have strongly compressed teeth; either deep cusps or serrations
- Teeth adapted for browsing (Auffenberg 1982)
- Markings: (Mitchell 2000b)
- Juveniles faintly or boldly marked with gray- to- moss green bands separated by gray- to- black chevrons pointing towards the head
- Adults grayish or brown black above, variable amounts of turquoise on dorsal spines, tail base, limbs, occasionally up onto sides in males
- Females tend to be not as colorful as the males
- Distinguishing characteristic for most iguanas:(Etheridge 1964)
- Usually 24 vertebrae before sacrum
- Usually tail vertebrae have 2 pairs of side flanges (transverse processes)
- 4 ribs attached to the breastbone (sternum)
- Pores present on skin over femur. (Etheridge 1964)
- Eyes flush bright crimson when agitated; yellow otherwise. (Mitchell 2010)
- Some authors cite clear morphological differences between Cyclura and the genus Iguana (Sites et al 1996) but Lazell (2005) disagrees, saying differences do not consistently divide the two iguana genera
- Can regenerate missing end of a tail. (Perry et al 2007)
- Thermoregulate to maintain high body temperatures in wild - between 30-40 °C (86-104°F)
- Members of the iguanid family, the agamid family (dragon lizards), and the chameleon family all have fleshy tongues and catch their prey with some involvement of the tongue. (Schwenk & Throckmorton 1989)
- Reptiles eyes have four kinds of cones for detecting light wavelengths (compared to three kinds for humans) (Brames 2007)
- Extra receptor detects UV-A wavelengths; used in species, sexual, and individual recognition, and in foraging and motion perception
- These UV-A wavelengths unseen by humans
- Rock iguanas may detect UV light absorbed by femoral gland secretions (Alberts 1989)
- This ability studied in desert iguanas
- Pheromone deposits on ground and objects in environment can be located using two modes of sensory input - olfactory and visual
- Social interactions between iguanas enabled with pheromone detection
This individual has a "mossy" look to it, similar to some other Anegada iguanas with broad stripes on their sides.
Image credit: © San Diego Zoo Wildlife Alliance. All rights reserved.
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