Hatchpedia

Match the hatch with 1,000+ insect photos, 471 fly suggestions, extensive data, and a custom search engine—not AI identification. Know what’s hatching. Catch more fish.

A mayfly lands on you. What is it? What's a good fly to tie on?

Hatchpedia puts a pocket-sized aquatic entomologist in your hand. Identify mayflies, caddisflies, stoneflies, and hundreds of other aquatic insects using everyday observations. Explore detailed photos, life stages, and hatch timing, whether you’re beside your favorite stream or planning your next trip.

DESCRIBE THE BUG. DISCOVER THE INSECT.
Upright wings. Yellow body. Two tails. 1/2 inch body.
Describe what you see in your own words. Hatchpedia’s purpose-built search engine matches your observations against more than 520 insects that trout love to eat. No scientific names or special search syntax required.
Not sure where to start? Search by Example gives you ready-made descriptions to try and adapt.

BUILT FOR DAYS OFF THE GRID
Your favorite fishing spots don’t always come with cell service. Hatchpedia’s insect identification and reference content work offline, so you can stay on the water instead of searching for a signal.

Subscribers can use Hatchpedia offline for up to 14 days after their last successful subscription verification. Open the app online before heading into the backcountry.

SEE THE DETAILS THAT MAKE THE DIFFERENCE
Explore more than 1,000 professionally licensed photographs selected to help you recognize aquatic insects through their life stages.
Look beyond a name with detailed information including:
- Common and scientific names
- Approximate adult size
- Known U.S. hatch regions and seasonal timing
- An explanation of why an insect matched your search
- Life-stage guidance explaining why each phase matters to trout

FIND WHAT FITS YOUR WATER
Use your location and date to narrow your search to insects associated with your area and season. Planning a trip? Choose a U.S. region and date to explore likely hatches before you pack your fly box.

START LEARNING FOR FREE
Explore Hatchpedia’s free educational pages about aquatic insects and their life cycles. Subscribe to unlock identification and the full reference experience.

From the first insect you notice to a deeper understanding of your home water, Hatchpedia helps you fish with knowledge and confidence.

Privacy policy: https://www.hatchpedia.com/privacy
Terms and conditions: https://www.hatchpedia.com/terms

Join our community:
Facebook: https://www.facebook.com/Hatchpedia
Instagram: https://www.instagram.com/hatchpedia

Recent changes:
v3 brings a completely redesigned look and experience.
- Redesigned screens and navigation throughout the app
- A fresh presentation of insect photos and detailed information
- A new guided tour to help you get acquainted with Hatchpedia
- 471 Suggested Flies to add to your Favorite Flies collection.
- Favorite Flies now link to all the insect species they imitate.

The aquatic insect knowledge you rely on, with a whole new experience.

(patch release: minor bug fixes)