Merlin Bird ID by Cornell Lab 4+

Identify Birds You See & Hear

Cornell University

Designed for iPhone

    • Free

iPhone Screenshots


What's that bird? Ask Merlin—the world’s leading app for birds. Just like magic, Merlin Bird ID will help you solve the mystery.

Merlin Bird ID helps you identify birds you see and hear. Merlin is unlike any other bird app—it's powered by eBird, the world’s largest database of bird sightings, sounds, and photos.

Merlin offers four fun ways to identify birds. Answer a few simple questions, upload a photo, record a singing bird, or explore birds in a region.

Whether you’re curious about a bird you’ve seen once or you’re hoping to identify every bird you can find, the answers are waiting for you with this free app from the renowned Cornell Lab of Ornithology.

• Expert ID tips, range maps, photos, and sounds help you learn about the birds you spot and build birding skills.
• Customized lists of birds to find where you live or travel
• Merlin was created by bird experts for everyone.
• Merlin is global—look up any bird at any location.
• Keep track of your sightings—linked to eBird, a global database of more than 1 billion bird observations!

• Powered by Visipedia, Merlin Sound ID and Photo ID uses deep learning to identify birds in photos and sounds. Merlin learns to recognize bird species based on training sets of millions of photos and sounds collected by birders at, archived in the Macaulay Library at the Cornell Lab of Ornithology.
• Merlin delivers the most accurate results thanks to experienced birders, who curate and annotate sightings, photos, and sounds, who are the true magic behind Merlin.

• Choose bird packs that contain photos, songs, and calls, and identification help for anywhere in the world, including Mexico, Costa Rica, South America, Europe, Africa, the Middle East, India, Australia, Korea, Japan, China, and more.
• It’s available in your language. Merlin is available in English, Spanish, Portuguese, French, Hebrew, German, Japanese, Korean, Turkish, Marathi, Malayalam, Afrikaans, Arabic, Indonesian, Russian, Simplified Chinese, and Traditional Chinese.

The Cornell Lab of Ornithology’s goal is to help you and millions of others to learn about birds. Our nonprofit mission to improve the understanding and protection of birds and nature is made possible by the generosity of Cornell Lab members, supporters, and citizen-science contributors.

What’s New

Version 2.1.5

New in this release
• eBird/Clements Taxonomy 2022 - Updated species names to align with eBird
• Updated app translations
• Support for both Portuguese (Portugal) and Portuguese (Brazil)
• Support for ID text in Marathi and Malayalam

Also included 2.1.4
Updates to My Sound Recordings screen to quickly explore and manage your recordings
• Quickly view the top species
• Search by species, location, and filename
• Sort by date, recording length, and file name
• Select multiple recordings to share or delete

New common name options
• Spanish (Honduras)
• Portuguese (Angola)

Other updates include:
• Support audio imports from iCloud
• Show recording length for Sound ID session longer than 1 hour

Ratings and Reviews

4.9 out of 5
55.1K Ratings

55.1K Ratings

Tory Mathis ,

Loads of fun

Let me begin by stating I never use the original function of describing the bird I see. If I can see it that we’ll, chances are I can identify it without Merlin. The same goes with the photo ID feature—if I can get close enough and get a good enough look , I can ID the bird as well as Merlin can. I have tested out the photo ID, and I believe it would be a useful tool for beginners. Be aware that it’s not perfect: it has just as hard a time distinguishing between sharp-shinned and Cooper’s hawks as I do. Where the app really shines is in the sound ID. At first I was a little skeptical. One of the first times I used it it thought that one bird was both a common raven and an American crow. Same thing with some gulls. It thought there was both a California and Herring gull. I eventually found one I could call a California, the Herring gull never materialized. It also thought there was a tundra swan, but upon reviewing the recording, there was nothing there, and definitely no swan within my sight. The more I have used it, however, the more confident I become in its ID power. Generally, if Merlin disagrees with what I thought the sound was, I’ll try to track it down and find it. And more often than not, I find what Merlin told me was there. But the most fun I have had with this app was watching a northern mockingbird singing while Merlin picked out thirteen different bird songs that one mockingbird had learned and incorporated into its repertoire.

Jimmyjummy69 ,

Amazing tool, but a few minuscule issues

This app is amazing. I use it every time I go bird watching, and it is far more efficient than most of the manuals I own. However, it is not without its minor faults.
The first and most blaring is the fact that Isee many birds with many more than only 3 colors, and when I see birds with only 3 or less colors they might be different colors than I have the options I have to pick from! I understand that there are limitations that make it difficult, but the app would be that closer to perfect if you added more colors and the option to pick more than three colors.
The other issue is that on a very slim chance I cant find the bird im looking for! This is for the most part my fault, but I think that sometimes it is because the bird isn’t on the list of birds registered on the app. It could also be because of the pictures of the birds do not include all or most variations of the bird I see, so I cannot confirm my sighting. If the roster of birds was filled up more, and there was more pictures, then all of those problems would be solved!
It is such a great app with such great features and it almost never fails me. The only issues it has are so minor, or could be fixed in an update soon, that it makes them nearly irrelevant. Because of all of this the app is virtually perfect, and i recommend all bird watchers newbies and veterans alike to download this app.

Cconner79 ,

Amazing App for easy Bird ID

This app is wonderful! I knew next to nothing about birds until a Eastern Goldfinch landed in my bird bath one day spurring interest into exactly what the name of this beautiful bird was. I searched inline but characteristics I described didn’t help me find what I was looking for so I checked in the App Store for a bird identification app finding many games but only a couple of identification apps I downloaded 3 but found this to be the best for me. Since then I have become an avid bird watcher! The app is easy to use even for me. I was disabled by a drunk driver in 05’ & fed up with tv so great to find a hobby I can enjoy outdoors. Even my parents joined in & my daddy after suffering a head injury himself in 2011 took up the hobby along with wood working. Together we would make feeders & houses to help attract more birds. He would build & I would paint different types of houses I researched on the website to help attract birds of all types. Unfortunately We lost him to cancer in February of this year (2018) but the time we spent birding together these past 7 years is something I’ll always hold near & dear to my heart. Thanks so much to the Cornell Lab of Ornithology, Birds in the Hand, & the developers of the Merlin Bird ID for providing us with this wonderful app that has given me some very sweet memories & a wonderful hobby.

App Privacy

The developer, Cornell University, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Linked to You

The following data may be collected and linked to your identity:

  • Identifiers

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Location
  • Contact Info
  • Usage Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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