Discover the 5 Largest Animals in Texas, and Where You’ll Find Them

American white pelican in Wisconsin
© Jerek Vaughn/

Written by Gail Baker Nelson

Updated: July 30, 2023

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Key Points:
  • The largest animal in Texas is the Texas longhorn, which weighs up to 1,500 pounds and stands 5 feet tall at the shoulder.
  • Giant green darners are the biggest dragonfly species in North America and the biggest flying insect in Texas.
  • Texas indigo snakes, the largest snakes in Texas, are also called rancher’s friends because they eat venomous snakes.

Texas is second only to Alaska in square miles and is known for the wide range of wildlife that calls the state home. A favorite saying is “everything’s bigger in Texas,” and for some animals, that certainly seems to be true. Land animals never make the list of biggest in the world because sea creatures always win the contest. However, the Lone Star State has a few amazing creatures. We dug through our resources to find what we believe are the largest animals in Texas.

Infographic of 5 Largest Animals in Texas
These are the biggest fish, snake, bird, mammal, and insect species in Texas.

Largest Fish: Alligator Gar

Close up of Alligator Gar swimming

Alligator gar have an unusual appearance as they look like



©tristan tan/

The alligator gar (Atractosteus spatula) is the largest fish in the Texas river system and the largest member of the gar family. This giant fish reaches up to 6 feet in length and can weigh over 300 pounds, although it’s surprisingly passive and sluggish, given its frightening appearance.

The record-holding alligator gar was accidentally caught in a net by a fisher in Vicksburg, Mississippi, and measured over 8 feet long. According to officials, it was probably 50 to 70 years old, although one report said it could be 95 or more.

This torpedo-shaped fish is native to many rivers and lakes in the southern United States. It’s a living fossil with a swim bladder lung that helps supplement its gills. It allows them to breathe air, which is why they’re also found in waters that would kill other fish through suffocation.

Largest Snake: Texas Indigo Snake

Texas Indigo Snake

The Texas indigo snake is a large active snake that flushes out prey then overpowers it.

©Radiant Reptilia/

The prize for the largest snake in Texas goes to the Texas indigo snake (Drymarchon melanurus erebennus) for its impressive length.

Texas indigo snakes are common in south Texas and northern Mexico. The farmers and ranchers love them because of what they eat. This species is part of a family of nonvenomous colubrids that help keep the venomous snake population in check. Their genus name of Drymarchon means “Lord of the Forest,” and the name fits.

The Texas indigo snake can measure over 8 feet long. They’re known rattlesnake eaters and even seem to be somewhat immune to rattlesnake venom. Texas indigo snakes appear in many YouTube videos in a death match with rattlers, often winning the fight, even after several bites from the rattler.

Largest Bird: American White Pelican

American white pelican in Wisconsin

American white pelicans have a wingspan of 9 feet.

©Jerek Vaughn/

Texas is home to an impressive number of birds. The state is home to thousands of wildlife species — you’ll find more than 650 species in the Lone Star State. The bright white plumage and black flight feathers of the American white pelican (Pelecanus erythrorhynchos) are visible from a distance. The American White pelican boasts a wingspan that reaches 9 feet and weighs up to 30 pounds, making it the largest bird in Texas.

You’ll only find American white pelicans away from water during their migration. These distinctive birds spend winters in Texas, then migrate north again to breeding grounds in the western United States and Canada.

These aquatic birds spend most of their time either in or near bodies of water like marshes, lakes, and rivers. They primarily eat fish they catch using their pouches to skim the water’s surface. However, like many predators, they are opportunistic and also eat crayfish and salamanders.

Largest Mammal: Longhorn Cattle

Texas Longhorn Cattle

Texas longhorn cattle have horns that are up to 11 feet long.


The Texas longhorn cattle (Bos taurus taurus) is the winner for the largest mammal, and indeed the largest animal in Texas. It also happens to be the state mammal. These bovine behemoths weigh up to 1,500 pounds and stand 5 feet tall at the shoulder. Their horns are massive and can measure up to 11 feet from tip to tip.

Longhorn cattle are the descendants of cattle that Spanish Explorers brought with them in the late 1400s. A few were left behind and became feral. Then, in the 1500s, the Spaniards brought more cattle with them to Mexico for food. Those interbred with the native Criollo cattle, and as they moved further north, some wandered off and joined the feral population.

Over the centuries, the cattle became outrageously tough, weathering freezing temperatures as well as blazing hot. During some of the most vicious weather Texas can dish out, longhorns survive conditions that our meat cattle breeds can’t.

They’re also extremely protective of their herd. Where many animals take off when a threat approaches, these cattle are known for standing their ground. You’re used to seeing mother animals protect their young, but in this case, if you mess with a baby, you get to tangle with the entire herd.

By the late 1920s, longhorn cattle were almost extinct because consumers prized the tallow that the European breeds provided. They would have disappeared completely if it weren’t for the efforts of a group of conservationists from the U.S. Forest Service who came together to preserve the breed.

Largest Flying Insect: Giant Green Darner

Giant green darner

Giant green darner, the largest insect in Texas, eats mosquitoes and other pesky bugs.

©Ken-ichi Ueda / CC BY 4.0, via Wikimedia Commons – Original / License

In a state with over 30,000 insect and arachnid species, it’s easy to get lost in the numbers. If you’re not a particular fan of insects, you may see them as all pretty much the same: creepy, crawly, and disgusting. However, there are a couple of notable insects that are, dare we say, pretty! The giant green darner (Anax walsinghami) wins for largest flying insect in Texas. The best part? They eat mosquitoes and other pesky bugs.

The giant green darner is a blue-green iridescent beauty that ranges from Texas to California and north to Nevada and Utah. According to, it’s a huge dragonfly that can reach 4.6 inches long, from its eyes to the end of its abdomen. However, other sources say that it can reach 5 inches in length. They inhabit areas around ponds, marshes, and lakes.

Summary of the 5 Largest Animals in Texas, and Where You’ll Find Them

Here’s a recap of the five biggest animals found in Texas that we took a look at.

NumberAnimalScientific NameCategorySize
1Alligator GarAtractosteus spatulaLargest FishReaches up to 6 feet in length and can weigh over 300 pounds
2Texas Indigo SnakeDrymarchon melanurus erebennusLargest SnakeOver 8 feet long
3American White PelicanPelecanus erythrorhynchosLargest BirdWingspan reaches 9 feet and weighs up to 30 pounds
4Longhorn CattleBos taurus taurusLargest MammalWeigh up to 1,500 pounds and stand 5 feet at shoulder
5Giant Green DarnerAnax walsinghamiLargest Flying Insect4.6 inches long, from its eyes to the end of its abdomen

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About the Author

Gail Baker Nelson is a writer at A-Z Animals where she focuses on reptiles and dogs. Gail has been writing for over a decade and uses her experience training her dogs and keeping toads, lizards, and snakes in her work. A resident of Texas, Gail loves working with her three dogs and caring for her cat, and pet ball python.

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