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Brown Bullhead

Brown Bullhead

Brown Bullhead are a small catfish species present in Colorado, though they're not native to the state and are listed as an invasive species.

These hardy fish are remarkably adaptable, tolerating water temperatures from near freezing to 86°F and surviving in heavily polluted waters with dissolved oxygen levels as low as 0. 2 ppm - conditions that would kill most other fish species.

Scientific Name: Ameiurus nebulosus

Physical Characteristics:
  • These fish are typically 7-12 inches long with a distinctive mottled brown coloration, four pairs of dark brown barbels around their mouth, a large rounded anal fin, and pectoral spines with 5-8 sharp serrations.

What to know

Habitat Distribution

  • According to Colorado Parks and Wildlife records, they were first documented in Colorado in 1952, with populations established in the South Platte River basin.

Key Locations

  • In Colorado, focus on the South Platte River system where established populations exist.

Specific Spots

  • Target ponds, lakes, reservoir backwaters, and quiet river sections.

Brown Bullhead FAQ

Answers from onWater's species guide.

What are the best lures and bait for Brown Bullhead in Colorado?

The most effective natural baits include nightcrawlers, cut bait, chicken livers, minnows, leeches, and crickets. For enhanced attraction in murky water, soak worms in pickled beet juice to add bright red color. Brown bullhead will also readily take corn, cheese, hot dogs, bread balls, and marshmallows.

When is the best time to fish for Brown Bullhead in Colorado?

Late spring through fall, with peak activity occurring during warmer months from late spring through summer.

How do you catch Brown Bullhead in Colorado?

Use still fishing or drift fishing techniques, keeping baits close to the bottom with sufficient weight. Keep hook points exposed rather than buried in bait, as their bony mouths require sharp hooks for good penetration.

What do Brown Bullhead eat?

They're opportunistic omnivores that feed primarily at night, using their sensitive barbels to locate food on lake and river bottoms. Their diet includes detritus, chironomid larvae, aquatic insects, small fish, fish e.g.gs, mollusks, crayfish, worms, leeches, and plant matter.

Where do Brown Bullhead live in Colorado?

According to Colorado Parks and Wildlife records, they were first documented in Colorado in 1952, with populations established in the South Platte River basin.

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