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Merlin Bird ID by Cornell Lab of Ornithology Review

Merlin Bird ID is a mobile application developed by the Cornell Lab of Ornithology for identifying bird species through sound, photos, and a step-by-step wizard.

shipped Sep 9, 2026writingfree
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Merlin Bird ID by Cornell Lab of Ornithology — product screenshot

Why it matters

1Offers Sound ID, Photo ID, and a step-by-step identification wizard for bird species.
2Provides downloadable regional bird packs for offline use, covering a broad range of global species.
3Integrates with eBird and Birds of the World, leveraging over 800 million sightings.
4Sound ID feature, available since 2021, identifies over 2,000 species globally.

overview

What is Merlin Bird ID by Cornell Lab of Ornithology?

Merlin Bird ID by Cornell Lab of Ornithology is an AI-powered mobile application tool developed by the Cornell Lab of Ornithology that enables users to identify bird species they encounter. It serves as a digital field guide and a citizen science tool, leveraging a vast database of bird sightings, sounds, and photos from eBird and the Macaulay Library. The application offers multiple identification methods, including real-time analysis of bird sounds, photo recognition, and a step-by-step identification wizard. It provides detailed information, photos, sounds, and range maps for over 10,000 species worldwide, with specific regional packs available for offline use, including for Europe. A significant upcoming development, reported in July 2026, will allow bird sound identifications recorded by Merlin to be automatically collected and sent into the eBird database, strengthening the link between the systems for conservation efforts.

features

Key Features of Merlin Bird ID by Cornell Lab of Ornithology

Merlin Bird ID by Cornell Lab of Ornithology provides a comprehensive suite of tools for bird identification and learning, leveraging advanced AI and extensive ornithological data. Its features are designed to assist both novice and experienced birdwatchers in the field and for educational purposes.

  • Sound ID for real-time bird song identification, identifying over 2,000 species globally since 2021.
  • Photo ID for identifying birds from user-submitted images, developed in collaboration with Caltech and Cornell Tech.
  • Step-by-step identification wizard based on user input about bird characteristics.
  • Downloadable regional bird packs for offline use, crucial for remote birding locations.
  • Personal 'Life List' to save and track identified bird species.
  • Explore lists of birds likely to be found in specific locations and dates, powered by over 800 million eBird sightings.
  • Access to community-contributed photos, songs, and calls for detailed species information.
  • Integrated range maps from Birds of the World for global species distribution.

use cases

Who Should Use Merlin Bird ID by Cornell Lab of Ornithology?

Merlin Bird ID by Cornell Lab of Ornithology is designed for a broad audience interested in avian identification and conservation. Its intuitive interface and robust features make it suitable for various users, from casual observers to dedicated citizen scientists.

  • Casual Birdwatchers: Individuals interested in identifying unknown birds in their backyard or during outdoor excursions.
  • Educational Users: Students and educators seeking detailed information, photos, sounds, and range maps for over 10,000 bird species worldwide.
  • Citizen Scientists: Users who wish to contribute to ornithological research by logging identified birds into the eBird database, aiding conservation efforts.
  • Outdoor Enthusiasts: Hikers, campers, and travelers who require offline bird identification capabilities in areas without internet access.

how to use

How to Use Merlin Bird ID by Cornell Lab of Ornithology

To begin using Merlin Bird ID by Cornell Lab of Ornithology, users download the free mobile application and select their region to download relevant bird packs. The app then offers multiple methods for bird identification.

  • 1Download the Merlin Bird ID application from the iOS App Store or Google Play Store.
  • 2Select and download regional bird packs for your current or intended birding locations to enable offline functionality.
  • 3To identify by sound, tap 'Sound ID' and record ambient bird calls; the app will provide real-time suggestions.
  • 4To identify by photo, tap 'Photo ID' and upload an image of a bird from your device's gallery.
  • 5Alternatively, use the 'Step-by-step ID' wizard by answering questions about the bird's size, color, and behavior.
  • 6Explore local bird lists, view detailed species profiles, and add identified birds to your personal 'Life List'.

pricing

Merlin Bird ID by Cornell Lab of Ornithology Pricing & Plans

Merlin Bird ID by Cornell Lab of Ornithology is offered completely free of charge. There are no hidden costs, in-app purchases, or premium tiers for any of its features, including Sound ID, Photo ID, the Bird ID Wizard, and downloadable regional bird packs. This model ensures accessibility for all users globally.

  • Merlin Bird ID: Free (Includes Sound ID, Photo ID, Bird ID Wizard, Offline regional bird packs, Life list, Explore local bird lists)

Pros

  • +Completely free with no in-app purchases or premium tiers, ensuring full accessibility.
  • +Offers multiple identification methods: Sound ID, Photo ID, and a step-by-step wizard.
  • +Provides downloadable regional bird packs for comprehensive offline functionality.
  • +Backed by the Cornell Lab of Ornithology, eBird, and the Macaulay Library, ensuring scientific accuracy and extensive data.
  • +Sound ID feature is highly accurate and identifies over 2,000 species globally.
  • +Integrates with eBird, allowing users to contribute to citizen science and conservation efforts.

Cons

  • −Some users report the app is 'getting too complex' with new features, potentially impacting user experience for those seeking simplicity.
  • −New features like 'Bird of the Day' may increase bandwidth usage and lag for some users, particularly on older devices or slower connections.
  • −While global, the depth of regional bird packs can vary, with some regions having more comprehensive data than others.
  • −Requires initial download of regional bird packs, which can consume storage space on mobile devices.

Similar Tools

Merlin Bird ID by Cornell Lab of Ornithology vs Competitors

Merlin Bird ID by Cornell Lab of Ornithology occupies a distinct position in the bird identification app market due to its comprehensive features, scientific backing, and free access. It differentiates itself from competitors through specific technological capabilities and its operational model.

1
Audubon Bird Guide App↗

It offers a comprehensive field guide for over 800 North American bird species with detailed text, photos, and audio, and a bird ID wizard based on observed characteristics.

While it provides a robust field guide and characteristic-based ID, it doesn't offer real-time sound identification like Merlin, and its photo ID is based on user input rather than direct image analysis.

2
BirdNET App↗

It excels in sound identification, allowing users to record bird sounds and get instant AI-powered suggestions for over 6,000 species globally, with an offline 'Live' mode for continuous real-time detection.

BirdNET is primarily focused on sound identification and while highly accurate for audio, it lacks the photo identification feature that Merlin offers.

3
Picture Bird↗

It identifies birds by both photo and sound, claiming high accuracy for over 1,000 species, and includes a personal collection feature.

While offering both photo and sound ID, Picture Bird has in-app purchases for unlimited use and premium features, whereas Merlin is entirely free.

4
Smart Bird ID↗

It identifies birds by photo or sound, helps users build a personal bird collection, and provides detailed information about each discovered species, explicitly stating 'Free. No ads. Ever.'

Smart Bird ID offers both photo and sound identification and a life list, similar to Merlin, but its global species coverage and the depth of its field guide information might not be as extensive or as widely recognized by ornithological experts as Merlin's Cornell Lab backing.

See every Merlin Bird ID by Cornell Lab of Ornithology alternative, compared→

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