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Anolis equestris


By Jennifer Niederlander

Species: Anolis equestris

Geographic Range

Knight anoles are native to Cuba. They have been introduced into southeastern Florida, and there are now breeding populations in Broward, Miami-Dade, and Palm Beach counties (Behler 1979, B. Hammond pers. comm.).

Biogeographic Regions
nearctic (Introduced , Native )

Habitat

Knight Anoles are arboreal and commonly found under shady canopies of large trees.

Habitat Regions
tropical ; terrestrial

Terrestrial Biomes
forest

Physical Description

Knight anoles grow to a length of 13 - 19 3/8 inches. They are the largest of the Anolis species. The snout is long and wedge-shaped. The tail is slightly compressed with a serrated upper edge. Each toe is expanded in the form of an adhesive pad. The adhesive pad occupies the central portion of the toe and is of an elongated form. The adhesive toe pads allow the knight anole to easily run up smooth, vertical surfaces, or run body downward on a horizontal plane. The body is covered with small granular scales with a yellow or white stripe under the eye and over the shoulder. They are bright green in color which can change to a dull grayish-brown. There is sexual dimorphism. Males have a pale pink throatfan that distends when excited. (Ditmars 1930, Behler 1979).

Other Physical Features
ectothermic ; heterothermic ; bilateral symmetry

Sexual Dimorphism
sexes colored or patterned differently; male more colorful; sexes shaped differently

Reproduction

Breeding occurs during the summer. Courting is similar to the beginning of fighting but attitudes are less extreme. The male nods his head one or more times and frequently expands his throatfan and then seizes the female by the nape of the neck. The male forces his tail under the female to bring their cloacas in contact. The male inserts his hemipenis into the cloaca of the female. Lab studies have shown males attempting to mate with other males; possibly due to their inability to distinguish males from females (Noble 1933). (Noble and Bradley, July 1933)

Mating System
polygynandrous (promiscuous)

Breeding interval
Anoles breed once yearly.

Breeding season
Breeding occurs during the summer months.

These anoles are egg-layers (Pope 1966). (Pope, 1966)

Key Reproductive Features
iteroparous ; seasonal breeding ; gonochoric/gonochoristic/dioecious (sexes separate); sexual ; fertilization (Internal ); oviparous

Lifespan/Longevity

Average lifespan
Sex: female
Status: captivity

8.3 years
[External Source: Max Planck Institute for Demographic Research]

Behavior

Knight Anoles are diurnal. They can be fiercely defensive when a snake or anything like a snake (a stick, a garden hose), gets too close. Their defensive display is to turns sideways, extends the throatfan, raise back crest, and gape menacingly (Behler 1979). A male fighting with other male anoles protrudes the throatfan to its fullest and then retracts it, repeating several times. He rises on all four legs, stiffly nods his head, and turns sideways towards rival. The male then turns bright green. Frequently the fight will end with the display, and the male most impressed by the display will drop his crest and slink away. If fighting continues, males rush at each other with mouths open. Sometimes jaws will lock if they go head on, otherwise they try to go for the limb of their opponent (Noble 1933). (Behler and King, 1979; Noble and Bradley, July 1933)

Key Behaviors
arboreal ; diurnal ; motile ; sedentary ; territorial

Food Habits

In the wild they eat grubs, crickets, coachroaches, spiders, and moths (Kaplan 1996). In captivity they can be fed crickets, mealworms, and smaller lizards (web2 1999).

Animal Foods
insects; terrestrial non-insect arthropods

Economic Importance for Humans: Positive

Many Anolis species are sold in pet stores. They make a good pet for the first time reptile owner.

Positive Impacts
pet trade

Conservation Status

IUCN Red List [Link]
No special status

US Federal List [Link]
No special status

CITES [Link]
No special status

Other Comments

Knight anoles are relatively slow and can be caught by hand, but they do have strong jaws and sharp teeth. In Florida, most do not survive cold winters (Behler 1979).

For More Information

Find Anolis equestris information at

Contributors

Jennifer Niederlander (author), Michigan State University, James Harding (editor), Michigan State University, , 205 Museum, Michigan State University, East Lansing, MI 48824.

References

????, G. "Exotic Reptiles" (On-line). Accessed January 21, 2002 at http://web2.airmail.net/photuris/reptilee.htm.

Behler, J., F. King. 1979. National Audubon Society Field Guide to North American Reptiles and Amphibians.. New York: Alfred A. Knopf.

Ditmars, R. 1930. Reptiles of the World. New York:

Haberham, Z. "Anolis Contact Group" (On-line). Accessed January 21, 2002 at http://come.to/anoliscontactgroup.

Kaplan, M. 1996. Accessed January 21, 2002 at http://www.anapsid.org/.

Noble, G., H. Bradley. July 1933. The mating behavior of lizards; its bearing on the theory of sexual selection.. New York Academy of Sciences Annals, 35: 25-100.

Pope, C. 1966. The Reptile World. New York:

To cite this page: Niederlander, J. 2002. "Anolis equestris" (On-line), Animal Diversity Web. Accessed February 12, 2012 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Anolis_equestris.html

Disclaimer: The Animal Diversity Web is an educational resource written largely by and for college students. ADW doesn't cover all species in the world, nor does it include all the latest scientific information about organisms we describe. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts. While ADW staff and contributors provide references to books and websites that we believe are reputable, we cannot necessarily endorse the contents of references beyond our control.

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