Nymphs
Sow Bug
The Sow Bug (or aquatic isopod) imitation is a flat-profiled, segmented nymph that imitates the tiny crustaceans found in enormous densities on tailwaters like the Bighorn, White River, and San Juan. Trout eat them all day, every day — making this a staple subsurface pattern.
Frequently Asked Questions
What size Sow Bug should I use?
The Sow Bug is most commonly tied in sizes 14–18. Choose smaller sizes for clear water and pressured fish, and larger sizes for faster or off-color water.
What does a Sow Bug imitate?
The Sow Bug primarily imitates sow bugs, aquatic isopods.
Pattern Details
- Category
- Nymphs
- Sizes
- 14–18
- Colors
- Gray, Tan, Pink
- Weight
- Small tungsten, None
- Hook Styles
- Scud hook
- Imitates
- sow bugs, aquatic isopods
- Water Types
- tailwater, spring creek
Target Species
rainbow troutbrown troutbrook troutcutthroat trout
Pattern Details
- Category
- Nymphs
- Sizes
- 14–18
- Colors
- Gray, Tan, Pink
- Weight
- Small tungsten, None
- Hook Styles
- Scud hook
- Imitates
- sow bugs, aquatic isopods
- Water Types
- tailwater, spring creek
Target Species
rainbow troutbrown troutbrook troutcutthroat trout