How to Use the Merlin Bird ID App to Identify Birds

Merlin can identify any bird by photo or song — point your phone at a bird or hold it up to birdsong, and the free app identifies the species instantly.

In this guide (5 steps):

1.Download Merlin Bird ID
2.Download a bird pack for your region
3.Try Sound ID in your backyard or a park
4.Identify a bird from a photo
5.Answer 5 questions to identify a bird you already saw

Download Merlin Bird ID

~15s

Search "Merlin Bird ID" in the App Store or Google Play. Download the free app from Cornell Lab of Ornithology. Open the app and allow microphone and camera access.

Download a bird pack for your region

~15s

Tap "Explore" → "Bird Packs" → download the pack for your region (for example, "North America"). This downloads bird data for offline use so the app works without internet.

Try Sound ID in your backyard or a park

~20s

Tap "Sound ID" on the main screen. Hold your phone toward where birds are singing. Merlin listens and shows birds in real time as it identifies their songs — multiple birds simultaneously.

Quick Tip

Early morning is the best time for Sound ID when birds are most active. Try it just after sunrise for the most impressive experience.

Identify a bird from a photo

~15s

Tap "Photo ID" → take a photo of the bird or upload one from your gallery. Merlin analyzes the image and suggests the most likely species with confidence percentages.

Answer 5 questions to identify a bird you already saw

~15s

Tap "Start Bird ID" and answer five questions: Date, Location, Bird size, Color, and What was it doing. Merlin narrows it down to the most likely species. Tap any suggestion to see full details.

You Did It!

You've completed: How to Use the Merlin Bird ID App to Identify Birds

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Merlin Bird ID is a free app from the Cornell Lab of Ornithology that identifies birds in three ways: from a photo you take, by listening to birdsong in real time, and from answers to five simple questions (What size? What color? Where did you see it?).

Sound ID is the most remarkable feature — hold your phone toward birdsong and Merlin identifies multiple birds simultaneously in real time, showing their names and photos as they sing. It works even when you cannot see the birds at all, just hear them.

Merlin includes detailed information about every bird it identifies: a description, photos from multiple angles, range maps showing where they live year-round vs. seasonally, and recordings of their calls.

For beginners

: The app is excellent for learning. Each identified bird shows which features to look for — the red breast of a robin, the black cap of a chickadee — helping you learn to identify birds yourself over time.

Merlin covers birds of North America, Europe, South America, Asia, Africa, and Australia. It downloads regional bird packs (free) so it works without internet in the field.

The app was developed by professional ornithologists at Cornell and uses AI trained on millions of bird photos and sounds. It is trusted by both beginners and experienced birders as one of the most accurate free bird identification tools available.

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