Brown anole
The brown anole (Anolis sagrei) is a small to medium-sized lizard native to Cuba and surrounding islands, known for its light brown coloration and ability to change shades. It is a highly invasive species, particularly in the United States, where it outcompetes and consumes native lizards. The brown anole primarily inhabits the ground and low vegetation in urban and suburban areas.
Key Facts
- ›Native to Cuba and the Caribbean, now widely invasive in the United States and other regions.
- ›Can change body coloration from brown to black, gray, or display yellowish dots when excited.
- ›Males have a dewlap, typically red or yellow, used for courtship and species identification.
- ›Feeds on a variety of arthropods, invertebrates, and occasionally small vertebrates and plant material.
- ›Females lay eggs individually, with a total of 15-18 eggs laid over a breeding season.
- ›Possesses a detachable tail that can twitch to distract predators.
Cuban Brown Anole, Bahaman Anole, De La Sagra's Anole
Cuba, Bahamas, Little Cayman, Cayman Brac, Jamaica, Swan Islands, YucatáN Peninsula, Belize, Guatemala, Honduras, Florida, Georgia, Texas, Louisiana, Tennessee, Mississippi, Alabama, Hawaii, North Carolina, Southern California, Mexico, Singapore, Taiwan
- Normally Light Brown With Darker Brown To Black Markings On the Back.
- Several Tan To Light-Colored Lines On the Sides.
- Can Change Coloration To Shades of Brown, Black, Or Gray; Some Display Yellowish Dots When Excited.
- Tail Has A Ridge Extending To Behind the Head, A Feature Absent In Carolina Anoles.
- Males Have A Smaller Head Than Male Carolina Anoles.
- Females Exhibit Polymorphic Dorsal Patterning, With Some Displaying Chevron Patterns and Others Striped Patterns.
Small Arthropods, Other Invertebrates, Other Lizards, Lizard Eggs and Hatchlings, Molted Skin and Detached Tails, Aquatic Arthropods, Small Fish, Figs, Plant Material
- Wary of Humans
- Highly Territorial, Especially Males Over Ground Below Perches
- Exhibit Intimidation Displays and Attacks Towards Competitors
- Migrate To New Territories Under Certain Circumstances
- Prefer To Remain In Original Territories Due To Predation Risks and Energetic Costs
- Active When Weather Is Warm, Prefer Sheltered Areas When Cold
- Juveniles Use Lower Perches When Exhibiting High Body Temperatures
- Use Visual Cues As Primary Signaling Mode
- Detachable Tail Used As A Defense Mechanism
- Alert and Possess Sprint Speed For Predator Evasion
- Molt In Small Pieces
- Consume Molted Skin To Replenish Calcium
Broad-Headed Skinks, Snakes, Birds, Other Species of Anoles, Spiders
- Competition With Native Lizard Species
- Predation By Introduced Species
- Parasite Transmission To Local Lizard Populations
About Brown anole
The brown anole, scientifically known as Anolis sagrei, is a species of lizard native to Cuba and the surrounding Caribbean islands. It is characterized by its light brown coloration, which can shift to darker browns, grays, or even display yellowish dots when excited, aiding in camouflage and rapid responses to threats. The species is easily recognizable by a distinct ridge running along its tail up to behind its head.
Habitat and Distribution
Originally found in Cuba, the Bahamas, Jamaica, and other Caribbean locales, the brown anole has become a highly invasive species due to human introduction, primarily through the horticultural trade. It is now widespread throughout Florida and other parts of the United States, including Georgia, Texas, and Hawaii, as well as in Mexico and parts of Asia. In its introduced range, the brown anole thrives in urban and suburban environments, preferring to live on the ground and in smaller plants and shrubs, unlike its more arboreal relative, the green anole.
Diet and Behavior
Brown anoles are opportunistic predators with a diverse diet. They primarily consume small arthropods such as crickets, ants, and spiders, but will also eat other invertebrates, small vertebrates like skinks and geckos, and even their own shed skin or detached tails. When near water, they are known to consume aquatic arthropods and small fish. Males exhibit territorial behavior, using displays and physical confrontation to defend their ground territories. Females lay individual eggs, typically a week apart, over a breeding season that can result in 15 to 18 eggs.
Ecological Impact
The introduction of the brown anole has had significant ecological consequences. As an invasive species, it reaches high population densities, outcompetes, and preys upon native lizards, altering local ecosystems. For example, in Florida, the presence of the brown anole has led to the decline of the native Carolina anole, forcing it to retreat to the treetops. In other regions, like Hawaii, they have been implicated in the transmission of deadly parasites among native lizard populations.
Source: Wikipedia ↗
Frequently Asked Questions
What is the scientific name for the brown anole?
The scientific name for the brown anole is Anolis sagrei. This binomial nomenclature is used to classify the species within the scientific community.
Where are brown anoles originally from?
The brown anole is native to Cuba and the surrounding Caribbean islands, including the Bahamas, Jamaica, and the Cayman Islands. Its natural range also extends to the Yucatán Peninsula and the Caribbean coast of Central America.
Why are brown anoles considered invasive?
Brown anoles are considered highly invasive because they reach exceptionally high population densities in introduced areas. They outcompete and consume native lizard species, such as the Carolina anole, negatively impacting local ecosystems.
What do brown anoles eat?
Brown anoles have a varied diet that includes small arthropods like crickets, ants, and spiders. They also consume other invertebrates, such as earthworms and snails, and have been known to eat other lizards, their eggs, hatchlings, and even their own molted skin.
How large do brown anoles get?
Brown anoles typically range from 5.0 to 8.5 inches in length. Males can grow up to 7.0–8.0 inches, with some individuals exceeding 9.0 inches, while females are generally smaller, ranging from 3.0 to 5.9 inches.
Do brown anoles have any natural predators?
Yes, brown anoles are preyed upon by various animals including broad-headed skinks, snakes, and birds. Juvenile brown anoles are also vulnerable to predation by spiders.
How do male brown anoles compete with each other?
Male brown anoles exhibit territoriality and engage in displays to intimidate rivals. They are more likely to attack competitors that approach their perch or occupy the same height. Larger males often initiate conflicts and perch higher than smaller males.
What is the function of a male brown anole's dewlap?
The dewlap, a flap of skin extending from the throat, is used by male brown anoles for courtship displays and to identify potential mates within their own species. Its color, typically red or yellow, can aid in species recognition and mate selection.
Related Lizards
Cuban brown anole
The Cuban brown anole (Anolis sagrei) is a small to medium-sized lizard native to the Caribbean, known for its ability to change color and its distinctive dorsal ridge. It is a highly invasive species in many introduced regions, often outcompeting and consuming native lizards. This anole primarily inhabits ground-level vegetation in urban and suburban areas.
Norops sagrei
The brown anole (Anolis sagrei) is a small to medium-sized lizard native to Cuba and surrounding Caribbean islands. Known for its adaptability and invasive nature, it typically exhibits a light brown coloration with darker markings and can change color in response to threats. This species primarily inhabits ground-level vegetation and is a significant predator of arthropods, but also prey for various vertebrates.
Calumma nasutum
The Calumma nasutum, commonly known as the Madagascar pimple-nose chameleon or big-nosed chameleon, is a small arboreal lizard native to Madagascar. It is distinguished by a prominent, paddle-like appendage on its nose, which is thought to aid in mate identification, particularly in males who also possess a more noticeable casque. This species inhabits dense rainforests and is primarily nocturnal, feeding on small invertebrates.