Calumma brevicorne
The short-horned chameleon (Calumma brevicorne) is a species endemic to Madagascar, characterized by its compressed body, spindly limbs, and prehensile tail adapted for an arboreal lifestyle. Males possess a distinctive short bony rostral appendage on their snout and ear-like occipital lobes, which they raise when threatened. Generally grayish, its coloration can vary between sexes and regions, with males sometimes displaying lighter heads and greener specimens having blue legs.
Key Facts
- ›Endemic to Madagascar, found in MID-altitude humid forests.
- ›Possesses a short bony rostral appendage on the male's snout.
- ›Distinctive ear-like occipital lobes are raised when threatened.
- ›Coloration varies, generally grayish with potential green or blue hues.
- ›Females lay 10 to 30 eggs approximately 40 days after mating.
- ›Eggs are vulnerable to predation by the invasive black rat (Rattus rattus).
Short-Horned Chameleon
Madagascar
Mid-Altitude Humid Forest, Forest Edges, Disturbed Areas, Agricultural Land With Trees, Roadside Vegetation, Trees Near Buildings
Compressed Body, Spindly Limbs, Grasping Feet, Prehensile Tail, Large, Ear-Like Occipital Lobes, Short Bony Rostral Appendage On Male's Snout, Generally Grayish In Color, Males May Have Lighter Colored Heads, Some Specimens Are Greener With Blue Legs
Insects
Arboreal, Raises Ear-Like Flaps When Threatened, Attacks With Open Mouth When Threatened
Rattus Rattus
Predation By Invasive Species
About Calumma brevicorne
Calumma brevicorne: The Short-Horned Chameleon
The short-horned chameleon, scientifically known as Calumma brevicorne, is a species of chameleon native to the island of Madagascar. This arboreal lizard is well-adapted to its forest environment, possessing a compressed body, spindly limbs, grasping feet, and a prehensile tail that allows for adept navigation through branches and twigs.
Physical Characteristics
The most striking features of Calumma brevicorne are its prominent, ear-like occipital lobes and, in males, a short, bony appendage that projects from the snout. When threatened, the chameleon raises these ear-like flaps to increase its apparent size and may attack with an open mouth. The general coloration is grayish, though variations occur between sexes and across its range. Males tend to have lighter heads, and some individuals exhibit greener coloration with blue legs.
Distribution and Habitat
Calumma brevicorne is endemic to Madagascar and is found within mid-altitude humid forests. It thrives in areas with open vegetation, often at forest edges and in disturbed zones. The species demonstrates a degree of tolerance for habitat modification, having been observed in agricultural lands with trees, roadside vegetation, and even in trees situated near human settlements. Its distribution spans eastern Madagascar, from the Anosy Mountains in the south to the Tsaratanana Massif in the north, with records also from the Analavory Plateau in the northwest, typically within an elevation band of 810 to 1,000 meters.
Ecology and Reproduction
Much about the ecology of the short-horned chameleon remains unknown. However, in captivity, it is known to consume a variety of insects. Females have been documented laying between 10 to 30 eggs, approximately 40 days after mating. A significant threat to the survival of its eggs is predation by the invasive black rat (Rattus rattus).
Conservation Status
The International Union for Conservation of Nature (IUCN) lists Calumma brevicorne as Least Concern, indicating that the species is not currently facing widespread threats that would lead to its immediate extinction. Population density estimates in areas like Andasibe-Mantadia National Park suggest a healthy presence within suitable habitats.
Source: Wikipedia ↗
Frequently Asked Questions
What are the defining physical features of the short-horned chameleon?
The short-horned chameleon has a compressed body, spindly limbs, and a prehensile tail. Males are distinguished by a short bony rostral appendage projecting from their snout and large, ear-like occipital lobes.
Where is the short-horned chameleon found geographically?
This species is endemic to Madagascar, with a broad distribution in eastern Madagascar between the Anosy Mountains and the Tsaratanana Massif. It has also been confirmed from the Analavory Plateau in the northwest.
What kind of habitat does the short-horned chameleon prefer?
It inhabits mid-altitude humid forests, often found in open vegetation, forest edges, and disturbed areas. It can also tolerate some habitat modification and is found in agricultural land, roadside vegetation, and near buildings.
What is the diet of the short-horned chameleon?
While little is known about its ecology in the wild, in captivity, the short-horned chameleon is known to feed on a wide variety of insects.
How does the short-horned chameleon defend itself?
When threatened, the short-horned chameleon raises its ear-like occipital lobes to appear larger and will attack with an open mouth. This display is intended to deter potential predators.
What is the reproductive behavior of the short-horned chameleon?
Females have been observed laying between 10 to 30 eggs, typically around 40 days after mating. The eggs are known to be vulnerable to predation by invasive species.
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