Report updated Apr 3, 2026
Merlin Bird ID by Cornell Lab
v3.8.3Bird watchers, outdoor enthusiasts, and nature lovers of all skill levels, ranging from curious beginners to experienced birders.
What Is Merlin Bird ID by Cornell Lab?
Launched Dec 11, 2013
Updated Mar 2026
What users think iIndependent intel reports to help builders create better apps or enhance existing ones. Still in beta, accuracy and relevancy get better every day. For informational purposes only.
What does it look like?
What are the key features?
Real-time identification of bird songs and calls using machine learning, functional offline.
Upload or snap photos to identify bird species using AI-powered image recognition.
Step-by-step identification tool that asks simple questions to narrow down species matches.
Digital tracking and logging of identified bird sightings to build a personal collection.
Generates location-specific lists of birds likely to be seen based on eBird data.
Downloadable regional content including photos, sounds, and maps for use without internet.
What do users think? iIndependent intel reports to help builders create better apps or enhance existing ones. Still in beta, accuracy and relevancy get better every day. For informational purposes only.
“Recent user voice shows a thrilled sentiment. Users appreciate bird identification accuracy and ease of use, but report technical issues and data loss and feature requests.”
What Users Love
Excellent at identifying birds.
Easily picks up bird song and quickly and accurately identifys it.
Beginning birder and the app is super easy to use
Very easy to use, engaging, doesn't crash.
Pain Points
Telling me I have no Internet connection when I do. Logging me out. And now losing my life list.
Needs a Dark Theme on Marilyn Bird ID app
The only thing I wish the app had was a way to keep a running list of all the birds the app has 'heard'
High confidence · 259.1K reviews available
How is it ranked?
| Chart | Rank | Change |
|---|---|---|
| Free | #4 |
What are the pros and cons?
Pros
- Unrivaled data moat via eBird and Macaulay Library
- High scientific accuracy and brand trust (Cornell Lab)
- Completely free with no ads or subscriptions
- Robust offline capabilities
Cons
- Lack of Dark Mode and modern UI customizations
- Occasional account/sync issues leading to data loss
- Minimal social/community engagement features
What is the market outlook?
Growth Opportunities
- Integration with smart birding hardware (feeders/binoculars)
- Gamification and social sharing to increase retention
- Partnerships with conservation and outdoor lifestyle brands
Market Threats
- Hardware-first competitors like BirdBuddy automating the hobby
- Commercial apps with faster feature development cycles
- Specialized acoustic apps targeting power users
Who competes with Merlin Bird ID by Cornell Lab?
The Nemesis
Audubon Bird Guide
National Audubon Society
The primary non-profit rival offering a comprehensive field guide, sightings database, and identification tools for North American birders.
The primary non-profit rival offering a comprehensive field guide, sightings database, and identification tools for North American birders.
Contenders
A gamified, beginner-friendly identification app that uses the same core AI technology as iNaturalist for real-time nature ID.
AI Image Recognition
Birda - Bird Watching App
Chirp Birding Ltd.
Competes by combining bird logging and life lists with a strong social community and global challenges.
Competes by combining bird logging and life lists with a strong social community and global challenges.
Peers
While focused on plants, it shares the same AI-identification workflow and targets the same outdoor enthusiast demographic.
Plant Disease Diagnosis & Cure
AllTrails: Hike, Bike & Run
★4.9 (1025K)AllTrails, Inc.
A core utility for the same outdoor user base who uses Merlin while hiking and exploring nature.
A core utility for the same outdoor user base who uses Merlin while hiking and exploring nature.
PlantSnap - Plant Scanner
PlantSnap, Inc.
A major player in the nature identification ecosystem using similar image recognition technology.
A major player in the nature identification ecosystem using similar image recognition technology.
New Kids on the Block
Birdbuddy: ID & Collect Birds
Buddy Bird Inc
A rising threat that integrates AI identification with smart hardware (feeders) to automate the birding experience.
A rising threat that integrates AI identification with smart hardware (feeders) to automate the birding experience.
What are the key takeaways?
Merlin Bird ID by Cornell Lab is a thrilling reference app that is completely free. With a 4.9/5 rating from 259.1K reviews, it thrills its users from users. Users particularly appreciate bird identification accuracy, though technical issues and data loss remains a common concern.
Best for: Bird watchers, outdoor enthusiasts, and nature lovers of all skill levels, ranging from curious beginners to experienced birders.
How much does it cost?
Model: free
The app is entirely free, supported by the Cornell Lab of Ornithology's mission and donor contributions, positioning it as a non-profit public service rather than a commercial product.
iOS Version
3.8.3
Android Version
3.10.1
Release Date
Dec 11, 2013
iOS Price
Free
Android Price
Free
Developer
Cornell University