Galapagos Insects and Invertebrates Galapagos Insects and Invertebrates

Because the Galapagos Islands were never physically connected to mainland South or Central America, the archipelago is home to a surprisingly limited variety of invertebrate and insect species compared to other tropical regions. Still, the insects that did manage to reach the islands—whether by strong winds, ocean currents, or accidental introduction by humans—have adapted in fascinating ways to their volcanic environment.

Visitors who are curious about Galapagos insects and other invertebrates will have the best luck spotting them after a heavy rain or at night, when ship lights attract species like the green hawkmoth and fringed noctuid moth. Butterflies are among the easiest Galapagos bugs to identify thanks to their colorful wings, while grasshoppers, beetles, ants, and spiders also form part of the islands’ diverse ecosystem.

From the brilliantly colored large painted grasshopper to the peculiar giant longhorn beetle, these small but essential creatures play a vital role in pollination, decomposition, and the balance of the islands’ food chains. A trip to the Galapagos isn’t only about giant tortoises and marine iguanas—taking the time to notice its lesser-known insect life offers another perspective on the islands’ incredible biodiversity.

Insects and Invertebrates

Species	Islands Best Viewed	Class	Characteristics
Galapagos Sulfur Butterfly	Main Islands	Endemic Sub-species	Smaller butterfly with bright yellow wings.
Monarch Butterfly	Widespread	Resident	Largest butterfly found in the Galapagos. Became residents of the islands after the introduction of the plant, milkweed.
Galapagos Blue Butterfly	Widespread	Endemic	Very small, light blue butterfly. Best found after a rain.
Large Tailed Skipper	Main Islands	Endemic	Small brown butterfly with wings reaching up to 2 inches. Found on all main islands, but are uncommon.
Green Hawkmoth	Widespread	Endemic Sub-species	Large bright green moth. Commonly found flying around ships' lights at night.
Indefatigable Hawkmoth	Santa Cruz	Endemic	Small light brown moth found only in the highlands of Santa Cruz.
Fringed Noctuid	Widespread	Resident	Largest moth on the islands with a wingspan reaching up to 6 inches. Most commonly seen at night near lights.
Longhorn Ant	Widespread	Introduced	Small ant, distinguished by its very long antennae.
Galapagos Greeneyed Horsefly	Widespread	Endemic	Largest fly in the islands. Common pests to tortoises, sea turtles, iguanas and humans. They bite!
Galapagos Carpenter Bee	Widespread - save northern islands	Endemic	The only bee in the islands.
Yellow Paper Wasp	Widespread - coastal	Introduced	Distinguished by striped black and yellow body. First recorded in islands in 1988, is now widespread.
Spotless Ladybug	Main islands	Endemic	Bright red, spotless ladybug. Important little insect that helps control the population of alphids and scale bugs.
Giant Long-horn Beetle	Widespread	Resident	Largest beetle in the islands with a pair of large and obvious pinches - nearly a 1/2 inch long.
Cockroaches	Widespread	Endemic and Introduced	Out of the eighteen species of cockroaches on the islands, 5 of these are endemic. Are particularly fond of ships.
Galapagos Field Cricket	Isabela, Santiago, San Cristobal, Espanola, Floreana, Santa Cruz	Endemic	A large, dark cricket with a sharp, pointed back end. 8 different species of field crickets are found in the Galapagos.
Large Painted Locus	Widespread - save Espanola	Endemic	Colorful and large grasshopper. Most commonly found after a heavy rain.
Spot-winged Glider	Widespread	Resident	Dragonfly with a bright red abdomen. Large - roughly 3.5 inches. Commonly found hunting over lagoons and ponds.
Squeak Bug	Widespread	Resident	Can "squeak" when picked up or threatened. Has very long antennae and back legs.
Galapagos Black Widow	Widespread	Endemic	Solid, very dark spider with a blubous abdomen. Lives under logs or in rock crevices. Best to avoid.
Zig-zag Spider	Main islands	Endemic	Spider commonly sits in the center of its webs. Has a tendency to build its webs across trails and paths.
Galapagos Centipede	Widespread	Endemic	Large centipede, reaching nearly a foot long, with a powerful set of poisonous fangs. Eats other invertebrates, lizards and small birds.
Galapagos Scorpion	Widespread - Coastal and Arid Regions	Endemic Sub-species	This small, light brown scorpion is a favorite food of lava lizards.
Galapagos flightless grasshopper	Widespread	Endemic	Small grasshopper, without wings. Their brown coloring make them very hard to find.
Star Spider	Widespread - coastal regions	Resident	Easily distinguished by its yellow and black shell-like abdomen. Look for this spider in mangroves in coastal regions.

These species represent just a sample of the many Galapagos insects and invertebrates that inhabit the islands. Each has adapted uniquely to survive the isolated and sometimes harsh volcanic landscape.

Why Galapagos Bugs Matter
Though often overlooked, Galapagos bugs and invertebrates are essential to the ecosystem. They help recycle nutrients into the soil, pollinate plants, and provide food for reptiles, birds, and even other insects. Some, like the carpenter bee, are critical to plant reproduction, while others, like ladybugs, act as natural pest controllers.
The limited diversity of insects in the Galapagos makes them especially vulnerable to environmental change and the introduction of invasive species. For this reason, strict regulations are in place to prevent the accidental transport of non-native bugs to the islands, which could disrupt delicate ecological balances.

Spotting Galapagos Insects on Your Trip
If you’re planning a visit, the best opportunities to observe Galapagos insects are:

• After Rain – Many butterflies, grasshoppers, and crickets are more active following rainfall.
• At Night – Moths like the hawkmoth and noctuid are drawn to lights, making evening excursions rewarding.
• In Coastal or Highland Areas – Spiders, beetles, and scorpions thrive in rocky crevices, mangroves, and forested regions.

Though small in size, these creatures are as much a part of the Galapagos story as giant tortoises or blue-footed boobies. They highlight the adaptability of life and offer fascinating glimpses into how species colonize and evolve in isolated ecosystems.