The Philippine Sailfin Lizard: A Comprehensive Guide

The Philippine Sailfin Lizard is a fascinating creature that's native to the Philippines. It's also known as the Sailfin Dragon Lizard.

This lizard can grow up to 24 inches in length, making it a relatively large species.

The Philippine Sailfin Lizard is primarily a terrestrial animal, spending most of its time on land.

On a similar theme: Amazon Sailfin Catfish

The Philippine sailfin lizard can be found throughout the Philippine islands, excluding the Palawan islands. They inhabit tropical wooded habitats near water, such as rivers and riverbanks, rice fields, and mangrove.

Populations of Philippine sailfin lizards have been documented in various islands, including Luzon, Mindanao, Samar, Leyte, and several others. They are also found in lowland and montane forests, marshes, and agricultural areas.

These lizards live in moderately high densities in their habitats. They prefer bodies of water nearby to be freshwater. The presence of water is crucial to their survival as it helps regulate their body temperature.

The Philippine sailfin lizard is known to spend much of its time near the water, basking in the sun on rocks or tree branches overhanging the water. They are also found in mangroves and marshes.

A unique perspective: Land Iguanas of the Galapagos Islands

The Philippine Sailfin Lizard is a truly impressive creature, and its physical characteristics are a big part of what makes it so amazing.

These lizards can grow up to 1.5 meters or 5 feet in length, making them one of the largest lizards in the world.

Their long and slender body is covered in tough, scaly skin that helps protect them from the elements.

The sail-like fin that runs along their back is perhaps their most distinctive feature.

This fin is made up of elongated spines that are attached to the lizard’s vertebral column, and when fully extended, it can reach up to twice the height of the lizard’s body.

The sail is typically a vibrant shade of yellow, orange, or green, adding a pop of color to the lizard's already impressive appearance.

The Philippine sailfin lizard is a unique creature, and one of its most distinctive features is its size. Typically, they grow to a length of between two and three feet, including their tails.

Males are larger than females, reaching lengths of up to 4 feet (91–120 cm). These lizards usually weigh between 3 and 5 pounds (1.4–2.3 kg).

One of the most striking features of the Philippine sailfin lizard is its crest or sailfin, which is an upright part of its body that occurs from the base of the tail to the lower area of the back. This crest helps the lizard swim efficiently in water.

The juvenile Philippine sailfin lizard is an excellent swimmer, thanks to its flattened toes and smaller mass. As adults gain weight, they lose this ability, but their flattened toes still allow them to swim effectively.

The males have a larger crest on their back than females, and their heads are also bigger. During mating season, the head of the male Philippine sailfin lizard becomes violet, while only the neck area of a female's crest can become violet.

Philippine sailfin lizards have dark green and brown skin, and can also have yellow patches on the back side of their bodies and near their heads.

Philippine sailfin lizards use their sailfins/scales for territorial displays in the presence of competing males or threats. This unique display helps them establish dominance and protect their territory.

They only breed once every year, with potentially multiple clutches of eggs. This means they have a relatively fixed breeding schedule.

For female Philippine sailfin lizards to lay their eggs after mating, they dig relatively shallow holes in soil near their watery habitats. This specific behavior is crucial for the eggs to incubate properly.

The eggs then incubate for roughly two months, after which they hatch during the rainy season. This timing is likely linked to the availability of food and suitable habitats for the young lizards.

Females are able to lay several clutches of eggs a year, with each clutch containing between two and eight eggs, laid above the flood line. This flexibility in egg-laying allows them to adapt to changing environmental conditions.

The Philippine sailfin lizard is a protected species in the Philippines, and capturing them from the wild or to export them out of the country is illegal.

Habitat loss is a major threat to the Philippine sailfin lizard, with only an estimated 7.5% of the mangrove forests of the Philippines in protected areas. Over the last 75 years, 75% of the mangrove forests of the Philippines have been lost.

The Philippine sailfin lizard is increasingly becoming vulnerable due to habitat loss, being hunted for food, and collection for the pet trade. They were sold in higher frequency between 1980 and 1990, before trade became illegal.

A black market for Philippine sailfin lizards still exists, with forensic examination of lizards in the exotic pets black market in Manila finding that most of them were poached from the Bicol Region. Other major black markets for the species include Puerto Princesa, Cebu, and Davao.

Keeping Philippine sailfin lizards in captivity requires a lot of space and specialized care.

They need large enclosures with tropical-styled heating, semiarboreal resources, and access to submerging in water to mimic their natural environment.

These lizards are extremely nervous and can scratch people, so it's essential to approach them with caution when held captive.

Hand-feeding them helps them become less nervous and gain trust, making the experience more enjoyable for both you and the lizard.

Some people keep Philippine sailfin lizards as pets, but it's crucial to do thorough research and consult with experts before deciding to bring one home.

A suitable habitat, diet, and care are essential to the health and well-being of the Philippine sailfin lizard.

Here are some key things to consider when keeping Philippine sailfin lizards in captivity:

The Philippine Sailfin Lizard is facing numerous threats that are contributing to its declining population. Habitat loss and degradation are major concerns, with the lizard's forested habitats rapidly disappearing due to agricultural expansion, logging, and human settlements.

The demand for exotic pets and animal parts remains high, leading to the capture and sale of Philippine Sailfin Lizards in both national and international markets. This is despite the species being listed under the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES).

Climate change is also affecting the Philippine Sailfin Lizard, as it is highly sensitive to changes in temperature and rainfall patterns. This can impact the lizard's survival rate and make it harder for conservation efforts to succeed.

The Philippine government has listed the Philippine Sailfin Lizard as "Vulnerable" under their National List of Threatened Wildlife, and several NGOs and conservation organizations are working to protect the species.

Hydrosaurus pustulatus, also known as the Philippine sailfin lizard, was first described in 1829 by Johann Friedrich von Eschscholtz.

The species was initially described as Istiturus pustulatus, but its classification has since been revised.

The specimens used to describe the species were collected from Luzon, Philippines, between 1823 and 1826 during the Imperial Russian expeditionary ship Predpriaetie's circumnavigational voyage.

It is one of five species currently recognized under the genus Hydrosaurus, which includes the sailfin dragons, and the only species found in the Philippines.

Hydrosaurus pustulatus is highly variable in terms of coloration and scale patterns across geographic populations.

A genetic study in 2014 discovered that H. pustulatus is divided into six distinct genetic clusters.

Explore further: Hydrosaurus Amboinensis