Wildlife You’ll Likely See While Kayaking in San Marcos
At Get Up And Go Kayaking – San Marcos, paddling the clear waters of the San Marcos River is more than just a scenic float, it’s a journey through one of the most unique spring-fed ecosystems in Texas. Flowing through San Marcos and powered by the Edwards Aquifer, this river stays a constant 72°F year-round and supports wildlife found almost nowhere else in the world.
From endangered species to birds fishing along the shoreline, here’s what you might encounter on your paddle.
Endangered & Endemic Species (Found Only Here):
The upper San Marcos River, especially near Spring Lake, is home to several federally protected species that rely on clean, flowing spring water.
- San Marcos Salamander: A small, slender salamander found in rocky areas of the upper river.
- Fountain Darter: A tiny fish that lives among aquatic vegetation and depends on healthy plant life like Texas wild-rice.
- Texas Blind Salamander: An underground species that lives within the Edwards Aquifer and spring openings. It has no functional eyes and is uniquely adapted to life in darkness.
- San Marcos Gambusia: A rare, endangered fish species endemic to this river system (recently declared extinct).
- Comal Springs Dryopid Beetle: An endangered aquatic beetle that requires consistent spring flows.
- Peck’s Cave Amphipod: A tiny endangered crustacean connected to the groundwater ecosystem.
- Texas Wild-Rice: An endangered aquatic plant found only in the upper San Marcos River. It stabilizes the riverbed and provides habitat for species like the Fountain Darter.
Fish Beneath Your Clear Kayak
One of the biggest highlights of paddling in a clear kayak is watching fish glide beneath you through underwater vegetation.
You may see:
- Guadalupe Bass (Texas State Fish)
- Largemouth bass
- Smallmouth bass
- Rio Grande cichlid
- Channel and yellow catfish
- Sunfish / Bluegill
- Gar
- Carp
The constant spring temperature creates ideal habitat year-round.
Mammals, Beavers & Reptiles Along the River
River Otters: North American river otters inhabit the upper San Marcos River and Spring Lake. They are playful and fast, spotting one is always a special treat.
Beavers: Beavers also live along the San Marcos River. While more active at dawn and dusk, you might notice signs of their presence like gnawed tree trunks or small dams along quieter stretches. Beavers play an important ecological role by shaping habitats and influencing water flow.
Turtles: Red-eared sliders and softshell turtles are commonly seen basking on logs before slipping into the water as you paddle by.
Water Snakes: Various non-venomous water snakes inhabit the river. Occasionally, a water moccasin (cottonmouth) may also be present, always give wildlife space and observe from a distance.
Other Riverbank Wildlife
Nutria, raccoons, foxes, and even bobcats can inhabit the riparian corridors surrounding the river.
Birds of the San Marcos River
The river corridor is alive with bird activity. You may see:
- Black-crested titmouse
- Marsh wren
- White-winged dove
- Downy woodpecker
- Carolina chickadee
- Herons and egrets
- Great Blue Heron
You may also spot fish-eating diving birds such as:
- Double-crested Cormorant
- Anhinga
Cormorants and anhingas are often seen perched on branches with their wings spread wide to dry after diving underwater for fish. Anhingas are sometimes called “snake birds” because their long neck is visible above the water while the rest of their body remains submerged.
A Living, Breathing Spring Ecosystem
The San Marcos River isn’t just beautiful, it’s ecologically irreplaceable. Because this spring system supports species found nowhere else on Earth, protecting aquifer levels and water quality is essential.
Every paddle with Get Up And Go Kayaking – San Marcos is a chance to experience this thriving ecosystem up close while learning about the conservation efforts that keep it healthy.
Wildlife sightings vary by season, water levels, and time of day, meaning every tour is a little different. Some days it’s turtles and bass beneath your kayak. Other days it’s birds overhead, diving cormorants, or signs of beaver activity along the banks.
No matter what you see, you’re exploring one of Texas’ most remarkable natural treasures.
Ready to experience it for yourself? Let’s get paddling.