Varanus glebopalma
The black-palmed rock monitor (Varanus glebopalma) is a secretive lizard found in Australia, known for its distinctive shiny black foot pads. Primarily inhabiting rocky escarpments and woodlands, this monitor is an ambush predator that feeds on insects, smaller reptiles, and amphibians. It is characterized by its black and brown reticulated patterning and a tail that transitions from black to creamy-yellow.
Key Facts
- ›Found in the Northern Territory, Western Australia, and Queensland, Australia.
- ›Inhabits rocky escarpments and open woodlands.
- ›Possesses distinctive shiny black pads on the undersides of its feet.
- ›An ambush predator feeding on insects, lizards, and small vertebrates.
- ›Reaches a total length of just over 100 cm.
- ›Considered 'Least Concern' by the IUCN.
Black-Palmed Rock Monitor, Twilight Monitor, Long-Tailed Rock Monitor
Northern Territory, Australia, Western Australia, Australia, Queensland, Australia
Rock Escarpment, Open Woodland, Arid Woodland, Monsoonal Forest
- Reaches A Total Length of Just Over 100 cm.
- Dorsal Coloration Is Black With Some Light Brown Scales, Overall Skin Is Reddish Or Gray Brown.
- Scales Form A Reticulated Pattern At the Sides Or Small Ocelli With A Black Central Spot On Top.
- Tail Is Blackish For the First Half of Its Length, Transitioning To A Creamy-Yellow Color.
- Top Sides of Head and Limbs Are Black With Small, Light Brown Or Cream-Colored Spots That Merge.
- Limbs Have Larger Spots.
Insects, Lizards, Small Vertebrates, Orthopterans, Skinks, Frogs
- Secretive and Eludes Casual Observers.
- Extremely Timid.
- Moves Quickly.
- Hunts During Daylight Hours, Though Activity At Dusk/Night May Be A Response To Disturbance.
- Ambush Predator.
- May Exhibit Territoriality, With Males Avoiding Each Other.
Advance of Rhinella Marina
About Varanus glebopalma
Black-Palmed Rock Monitor
The black-palmed rock monitor, scientifically known as Varanus glebopalma, is a fascinating reptile native to Australia. This species belongs to the Varanidae family and is characterized by its secretive nature and distinctive shiny black pads on the undersides of its feet, which give it its common name. It is found across northern Australia, including the Northern Territory, Western Australia, and Queensland, inhabiting rugged environments.
Habitat and Distribution
This monitor thrives in complex rocky outcrops that provide ample crevices and boulders, often in association with open woodlands. While trees are present in its environment, Varanus glebopalma is not known to be arboreal, preferring to remain close to the ground and its rocky refuges. Its distribution spans from the Kimberley region in the west to Mount Isa in Queensland, extending from coastal areas to inland districts.
Physical Characteristics and Behavior
Varanus glebopalma can reach a total length of just over 100 centimeters. Its dorsal coloration typically features a black ground color interspersed with light brown scales, creating a reticulated pattern. The tail is notably black for its proximal half, gradually transitioning to a creamy-yellow hue. The species is described as extremely timid and moves with considerable speed, often eluding detection. It employs an ambush hunting strategy, preying on insects, smaller lizards, frogs, and other small vertebrates. Notably, there are observations suggesting territorial behavior in males, a trait not commonly documented in other varanid species.
Diet and Conservation
The diet of the black-palmed rock monitor varies seasonally. During the dry season, it actively seeks out orthopterans, such as grasshoppers. As the wet season progresses, skinks become a more significant part of its diet, supplemented by frogs and other small vertebrates. According to an IUCN assessment from 2017, the species is considered 'Least Concern,' with a presumed stable population. However, it is recognized as being susceptible to threats such as the spread of invasive species, including the poisonous cane toad (Rhinella marina).
Source: Wikipedia ↗
Frequently Asked Questions
What are the common names for Varanus glebopalma?
Varanus glebopalma is commonly known as the black-palmed rock monitor. Other names it is referred to by include the twilight monitor and the long-tailed rock monitor.
Where is the black-palmed rock monitor found?
This species is distributed across northern Australia, specifically in the Northern Territory, Western Australia, and Queensland. Its range extends from the Kimberleys in the west to Mount Isa in the east.
What does the black-palmed rock monitor eat?
Its diet consists of insects, smaller lizards, and other small vertebrates. During the dry season, it targets grasshoppers, while skinks become a primary food source during the wet season. Frogs are also consumed.
What is the habitat of Varanus glebopalma?
The black-palmed rock monitor prefers complex rocky outcrops that offer crevices and boulders, typically found in association with open woodlands. While trees are present in its environment, the species is not arboreal.
What are the distinctive physical features of Varanus glebopalma?
A key characteristic is the shiny black pads on the soles of its feet. Its coloration includes a black ground color on its back with light brown scales, forming a reticulated pattern. The tail is black for the first half and then becomes creamy-yellow.
Is the black-palmed rock monitor a shy species?
Yes, Varanus glebopalma is described as secretive and extremely timid. It is known to elude casual observers and is well-adapted to moving quickly.
What is the conservation status of the black-palmed rock monitor?
The species is listed as 'Least Concern' by the IUCN, with its population believed to be stable. However, it is susceptible to the spread of invasive species like the cane toad.
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