All of the creatures that have found lasting success on St. Martin have some kind of adaptation that makes them suited to life here. Freshwater species have more challenges than most, and the Apple Snail is well equipped to deal with them.

The Apple Snail is a large snail that lives in freshwater habitats. Members of their family live in Africa, Asia and the Americas, so scientists believe they date back to a time when all the continents were joined together. In this hemisphere, most species are native to South America, with a few found just in the Caribbean.

Many of the adaptations of the Apple Snail allow it to survive dry seasons, which happen each year in many tropical areas. Like many snails, they have an operculum—a door to their shell. They can seal it if the pond or stream they live in goes dry. They enter a state known as estivation, resting dormant until rains return.

The Apple Snail is also somewhat amphibious. They have a gill for breathing underwater, and a lung for breathing air. The ability to breathe air allows them to leave the water, at least temporarily, to feed. In stagnant water, they can use the lung to get additional oxygen from the air. They even have a special snorkel that they can extend to breathe air while they are still underwater.

Another benefit of their amphibious nature is the ability to protect their eggs. These snails leave the water, and lay a cluster of eggs above the water line. This protects the eggs from fish and other potential predators.

This variety of adaptations has made the Apple Snail quite successful. They have also made it an unwanted pest in places where it has been introduced accidentally or on purpose. One species—brought to Taiwan as a potential food—ended up seriously harming rice production. Its ability to leave the water to feed makes it a pest for other crops as well.

On St. Martin, this snail can be found in many of the small streams and drainage ditches in Concordia, often using its lung to traverse extremely shallow areas. Plants along the banks of these streams hold egg clusters, looking like pale, misshapen raspberries. The next time you are in the area, keep an eye out for these remarkable snails.

People have spent more than 200 years systematically describing and naming the plants and animals around us. One could be forgiven for thinking that process is winding down. The truth is almost the opposite: we’re still finding about 10,000 new species of animals every year.

To be fair, many of these new species are insects. We’ve described about a million insect species, but there may be six to ten million more to go. But we’re also discovering bigger animals: lizards, frogs, birds and even whales.

Almost certainly, there are unknown species right here on St. Martin. We’ve already become the home of three “new” lizard species in the 21st century. None of them were unknown exactly, but none of them were considered distinct species until recently. The Bearded Anole, for example, was considered a subspecies of Watts’ Anole until DNA analysis determined that they had more differences than we thought.

In some cases, two species look so similar it is almost impossible to tell them apart. These are called cryptic species. Genetic analysis can be used to distinguish two species hiding in one form. In other cases, two identical animals may have different parasites—parasites that can tell them apart even when we cannot.

Many of the new species we will find on St. Martin will be small, plain animals: beetles that live under rocks, tiny moths and little spiders. The process of identifying and describing them will take a long time. Much of the work will be done under the microscope and in DNA sequencers.

There are some colorful and engaging bugs that we are still uncertain about. The soapberry bug of St. Martin remains undescribed, although specimens have been delivered to a group of scientists for study. Our stick insect may be a new species as well.

Does it matter if we identify all the tiny creatures that live on St. Martin? In some ways, it could be more an issue of philosophy than practicality. Who would we be if we lost the desire to learn more about the world around us? On the other hand, perhaps this seemingly obscure knowledge does have a future use. Could we someday bring life to a distant planet without understanding it first here on earth?

We are all familiar with the salmon’s journey. From the ocean, it enters rivers and makes a miraculous journey upstream to spawn and then die. In the Caribbean, there are many animals that find a life between the land and sea, and a home in fresh and salty waters.

On St. Martin, one is never far from the sea. Most obviously, we find it at the edge of every beach and at the bottom of each seaside cliff. But the sea also has ways of invading the island itself.

The sea seeps into the land through the porous limestone, adding its salty essence to well water. It washes upstream in the few spots where fresh water running down a gut reaches the sea. And, of course, salty water from the sea fills many of our salt ponds.

These brackish waters—neither part of the sea, nor totally separate from it—are a rich and unique habitat. The creatures that live here must adapt to the changing conditions of this zone: a rainstorm pushing the balance towards freshness, a dry spell pushing it to salty.

For some, life between two worlds is just a passing phase. Many juvenile fish use brackish mangrove wetlands as a nursery. In the shallow water, sheltered in mangrove roots, they find a safe place to grow. They then swim out to the coral reef to live. Some freshwater species—like the Mountain Mullet and many freshwater shrimp—float in the sea as eggs. After hatching they travel with the current, then swim into fresh water to mature.

Fish like the Crested Goby spend a lifetime on the borderline. They often live around mangroves, digging out a hollow in the sand or finding a root-sheltered hiding spot. They also live in estuaries where streams and rivers empty into the sea. Unlike most fish, they can live perfectly fresh water, pure seawater and anything in-between.

The Crested Goby is also flexible when it comes to food. Algae is on the menu, but so are crabs, insects, snails and even small fish. It is an integral part of the wetland community that captures nutrients washed down from the island. It plays a part in keeping the seas both clean and full of life.

The adaptable Crested Goby has found a niche that allows it to occupy the cracks and crevices between two worlds. In doing so, it has also turned its back on life in the open ocean. It is a creature of the sea, tied forever to the edge of the land.

The ravines on the western slope of Pic Paradis feature a forest unlike anything else on St. Martin—or neighboring Anguilla and St. Barts for that matter. It is the homeland of our Bearded Anole, and may have been its birthplace, too.

In ecology, endemic means something that is only found in one specific place. There are a couple ways this can happen. A neoendemic species is a new species that evolves in a unique location. This happens a lot on islands. The term paleoendemic describes almost the opposite situation: the last refuge of a species that was once more widespread. This can happen on an island, too.

Our beautiful Bearded Anole—like most of our native reptiles—is a great example of a neoendemic species. Little lizards spread from island to island, blossoming into a wide variety of species as they adapted to their new homes. Lush forest may have been ancestral home of this species. It is ill-suited to the full heat of the tropical sun, and is primarily found in shady areas.

For most of the last 100,000 years, the Bearded Anole probably had lots of habitat. Sea levels were lower, and St. Martin was part of a much bigger island that included present-day Anguilla, St. Barts and beyond. Surely there were many shady forests where this lizard could live.

Around 12,000 years ago, rising sea levels separated St. Martin, Anguilla and St. Barts. The Bearded Anole probably lived on all three islands, but St. Barts and Anguilla are both lower than St. Martin. Because of this, they lacked the water and wind protection to develop the type of broadleaf forest that stretches from Colombier up to Pic Paradis.

We have no record of the Bearded Anole on St. Barts, and it was last recorded on Anguilla in the 1920s. Today it lives only on St. Martin, a relict population in its last refuge. It is both a neoendemic species that arose here, and a paleoendemic species that disappeared from the other places it lived.

Many of natures most miraculous creatures evolved on islands. They make up a tiny percentage of the land mass of the earth, but are home to much of the planet’s diversity. Unfortunately, over half of animal extinctions have also happened on islands, a trend that continues. The individuality of the island—in richness and struggle—is reflected in our Bearded Anole.

You can learn more about the Bearded Anole and other animals found only on St. Martin at Amuseum Naturalis, located at 96 Boulevard de Grand Case. The museum is free and open 4-8pm on Tuesdays and Thursdays. On Sunday, April 23rd from 9am-3pm the Amuseum will host the 2017 Endemic Animal Festival. Get more info at http://amuseumnaturalis.com.

They’re all around us, but we rarely notice them. They’re specially-equipped for climbing, but mostly live on the ground. They’re probably the most common reptiles on St. Martin, but few people even know their names.

St. Martin’s dwarf geckos are some of its most unique and mysterious residents. The island has two species. The smaller one is known as the Little Woodslave or Anguilla Bank Dwarf Gecko. The larger is called the Least Island Gecko or Leeward Banded Dwarf Gecko. Hidden in their confusing names are some clues to how unique they are.

The Little Woodslave is found on only a few islands in the world: Anguilla, St. Martin, St. Barts and the smaller islets in the immediate area. Combined, these islands make up the Anguilla Bank featured in the name Anguilla Bank Dwarf Gecko. When the last ice age lowered sea levels by locking water in glaciers, these islands were connected into a larger island. Hop over to Saba or Statia—which have never been connected to St. Martin—and you won’t find the Little Woodslave. Its cousin, the Saban Dwarf Gecko, lives there.

It’s hard to say what the name Least Island Gecko is supposed to mean. It doesn’t live on the fewest islands—it’s found from Anguilla down to Nevis. It also isn’t the smallest—there is a smaller dwarf gecko on every island where it lives. It’s other name, Leeward Banded Dwarf Gecko, isn’t much better. Sometimes they are banded, but other times not at all.

Dwarf geckos may be small, but they do have strength in numbers. There are over 100 species of dwarf gecko in the genus Sphaerodactylus, and the vast majority live only in the Caribbean. This vibrant diversity is one reason the Caribbean is considered a biodiversity hotspot.

In terms of population, one study measured dwarf gecko density equivalent to 21,000 geckos per acre. In theory that would work out to about 450 million dwarf geckos on St. Martin, if the entire island were perfect habitat for them. Probably there are far fewer, but the real number could be almost unimaginably high.

What do these tiny lizards do? They eat insects. Mostly ants and other very small things, and probably a lot of them. Perhaps enough to impact the whole ecosystem of the island. They turned their miniature size into an advantage that made them incredibly successful. In the Caribbean, their tiny feet leave a big footprint.

You can learn more about dwarf geckos and other animals found only in our region at Amuseum Naturalis, located at 96 Boulevard de Grand Case. The museum is free and open 4-8pm on Tuesdays and Thursdays. Get more info at http://amuseumnaturalis.com.

St. Martin’s native animals may not be famous yet, but they deserve to be. They are a true showcase of what makes the island unique, and some of them are found nowhere else in the world. They’re also the stars of a new ebook titled Caribbean Curiosities: Native Nature and the upcoming Endemic Animal Festival.

The free ebook tells six fascinating stories centered around different native animals, including bats, lizards, birds, fish and insects. It is illustrated with vibrant photos taken on the island. The ebook was written by Mark Yokoyama and released by the non-profit association Les Fruits de Mer. It can be downloaded from the Les Fruits de Mer website.

Les Fruits de Mer also produces the annual Endemic Animal Festival, an event celebrating the animals that are found only on St. Martin, or only in our region. This year’s event will be held at Amuseum Naturalis, St. Martin’s only natural history museum. In addition to the museum’s regular exhibits, there will be a variety of other attractions during the festival, including an Endemic Animal Discovery Station and wildlife-themed art activities. The free, all ages festival will be held on Sunday, April 23rd from 9am to 3pm.

To download Caribbean Curiosities: Native Nature and to learn more about the Endemic Animal Festival, visit lesfruitsdemer.com. Amuseum Naturalis is located at 96 Boulevard de Grand Case in Grand Case and is open Tuesdays and Thursdays 4-8pm.

Bats are St. Martin’s only native mammals. At least, they are the only ones alive today. Two prehistoric rodents lived on St. Martin, but they were long gone by the time recorded history began here. All other mammals on the island were brought by humans. This includes the wild ones—rat, mongoose, mongoose, raccoon, monkey—as well as our pets and farm animals.

Bats have used the power of flight to diversify, adopt many different lifestyles, and travel. There are over 1,000 species of bats in the world, and eight are found on St. Martin. Our bats pursue a variety of foods and make their homes in a variety of places.

The Velvety Free-tailed Bat eats insects and often lives beneath corrugated zinc roof sheets. It is a small bat, often seen in neighborhoods. It comes out around dusk to catch flying insects. To our benefit, mosquitos are often part of its dinner.

The Jamaican Fruit Bat and Antillean Cave Bat are larger, and they eat fruit. They are often seen around fruit trees at night, including almond, mango and palm trees. These bats nest in large groups in caves, especially the Grotte du Puits in the lowlands. The floor of the cave is covered in fruit pits brought back to the cave by the bats.

One of our most remarkable bats is the Fisherman Bat. This species uses echolocation to sense ripples made by fish on the surface of the water. Then it swoops down and grabs the fish with its large feet. Of course, all of this is done in complete darkness!

Bats have adapted to Caribbean islands, becoming new species along the way. The Antillean Cave Bat is found only in the Caribbean. The Lesser Antillean Tree Bat and Lesser Antillean Funnel-eared Bat are found only in the Lesser Antilles. The only mammals to fly, and our only native mammals, they have truly made the Caribbean their home.

You can learn more about St. Martin’s bats at Amuseum Naturalis, located at 96 Boulevard de Grand Case. The museum is free and open 4-8pm on Tuesdays and Thursdays. Get more info at http://amuseumnaturalis.com.

Evolution is happening all around us, but the processes that create new species are also being undone at the same time.

There are no bird species that live only on St. Martin. It’s not too surprising—on a clear day you can watch birds flying across to Anguilla or arriving here from Saba. Some birds even fly thousands of miles to live here each winter. But not all birds are such avid travelers.

Many of the birds on St. Martin are found only in our region. You can often tell by the names, like Lesser Antillean Bullfinch, Caribbean Elaenia, Antillean Crested Hummingbird, Carib Grackle and Green-throated Carib. Some other local birds have wider ranges, but distinct subspecies or varieties in the Caribbean. Although they can fly across the sea, they usually don’t.

Like all living things in nature, these birds are in the process of evolving. Over generations, Sugar Birds on St. Martin might adapt ever so slightly to the conditions on this island. They might get better at harvesting nectar from the flowers found here or nesting out of the reach of the mongoose. These could be the first invisible steps towards becoming a St. Martin Sugar Bird, found nowhere else in the world.

While this is happening, other events are reversing this evolution. A hurricane strike on a nearby island might send desperate birds here in search of food. As they integrate with the local Sugar Bird population they smooth out the tiny differences that were beginning to develop in the St. Martin population. The balance of isolation and movement can create regional varieties that never develop into distinct new species.

The ability to analyze genetic differences has given us a window into the subtle differences between Sugar Birds and a look into their past. A recent study compared over 40 different Sugar Birds from different areas with surprising results. Over the past several million years, there have been three separate periods when Sugar Birds from the Greater Antilles expanded into the Lesser Antilles. Each new wave mixed with the Sugar Birds here, and the birds living here today still carry the evidence of these movements in their genes.

You can learn more about the birds found only in our region at at Amuseum Naturalis, located at 96 Boulevard de Grand Case. The museum is free and open 4-8pm on Tuesdays and Thursdays. Get more info at http://amuseumnaturalis.com.

It’s only been two months since Amuseum Naturalis officially launched its 2017 season in January, but the free natural history museum has already had over 5,000 visitors this year. To celebrate, Amuseum Naturalis creators Les Fruits de Mer are sharing a free ebook, Caribbean Curiosities: Island of Change.

This ebook is the second volume in a series highlighting the plants and animals featured in the museum. Both volumes are available for free from the resources section of the association’s website. This volume highlights some of the many species that were introduced to the island by humans, and how they are changing St. Martin’s local ecology.

“The Caribbean Curiosities ebooks are a chance to build on the stories we are sharing at the Amuseum,” explained Amuseum curator Mark Yokoyama. “They’re also a chance to share some of the magic of the Amuseum with people who haven’t had a chance to visit yet.”

Amuseum Naturalis is open on Tuesdays and Thursdays from 4-8pm and admission is free. Group visits—for school classes, youth groups, or any kind of group—can be scheduled during March and April by email at info@lesfruitsdemer.org or on the Amuseum’s website.

“We’re surprised and excited to have welcomed 5,000 visitors in just two months,” commented Les Fruits de Mer President Jenn Yerkes. “It’s so fun to share the island’s natural history with a diverse group of locals and tourists each week. We also hope to host more school classes and other group visits, so please get in touch!”

Amuseum Naturalis is a free, public pop-up museum of the natural history of St. Martin and the Caribbean, created by Les Fruits de Mer and made possible by the generous sponsorship of Delta Petroleum and the support of the Friends of the Amuseum. Amuseum Naturalis is located at 96 Boulevard de Grand Case in Grand Case and on the web at http://amuseumnaturalis.com.

Giant can be a relative term. The Giant African Land Snail is definitely a giant among land snails, even if it is only a few inches long. It also manages to be one of the world’s worst invasive species, but it is it a giant problem on St. Martin?

What’s the big deal about this giant snail? Originally from Africa, it has been spread by humans throughout much of the world’s tropics. Once it becomes established, it can transform its new home in a variety of ways, endangering local ecosystems, agriculture and even human health.

The Giant African Land Snail is hermaphroditic, so every one is able to lay eggs. They do so 100-400 eggs at a time, up to 1200 eggs per year. Once they are introduced, they are quick to take over. Getting rid of them is hard. In Florida, an infestation was eradicated in the early 1970s. The effort involved killing 18,000 snails and cost over $4 million in today’s dollars.

These snails are known to eat over 500 different kinds of plants, including many agricultural crops. They eat leaves, fruits and roots, scraping away at them with 80,000 tiny teeth on their file-like radula. They can also transmit diseases to plants, including diseases impacting cocoa, tangerines and eggplants.

In some parts of the world, these snails are also responsible for spreading certain diseases, including some caused by nematode worms that live in the snails. Luckily, humans usually catch these diseases by eating raw or undercooked Giant African Land Snails, something that most of us will have no problem avoiding.

In the Caribbean, this snail was first found in Guadeloupe in 1984. By some accounts, it arrived in St. Martin along with supplies imported when the island was rebuilding after hurricane Luis. Whether that’s true or not, Guadeloupe does seem like a likely source for our snails. Today, these snails can be found all over the island.

Since St. Martin’s major industry is tourism, this snail probably has a bigger impact on local ecology than it does on the local economy. It may harm native plants and outcompete local snails. Like many other invasive species, understanding the extent of its impact would require extensive research that has not yet been done here. On St. Martin, it may not be the giant problem it is in some places.

You can learn more about invasive species and their impact on St. Martin at Amuseum Naturalis, located at 96 Boulevard de Grand Case. The museum is free and open 4-8pm on Tuesdays and Thursdays. Get more info at http://amuseumnaturalis.com.