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Iris patterns offer a noninvasive way to recognize individual Amazonian treefrogs
Researchers identified 103 individual frogs across 392 captures in French Guiana's Nouragues Nature Reserve; the old method meant clipping toes.
On air: Dr. Nina Byte and Vera Bullock on BBN After HoursPublished
Photo: Woudloper · Public domain · Wikimedia Commons · altered by BBNWatch it as it aired: Dr. Nina Byte and Vera Bullock on this story, from BBN After Hours at 4:18 AM ET. Cartoon anchors, real headline: the facts are Phys.org's, the jokes are ours.
At a glance
- First reported by Phys.org: “Iris patterns offer a noninvasive way to recognize individual Amazonian treefrogs”, with reporting from Zenodo (study record).
- Covered on BBN on Friday, October 23, 2026, at 4:18 AM ET on BBN After Hours, by Dr. Nina Byte and Vera Bullock.
The real story
The reporting behind this segment. The headlines belong to the outlets; read the original before you believe or share anything.
What BBN said about it
Dr. Nina Byte · Tech & Science CorrespondentResearchers at the University of Bern found that Amazonian treefrogs can be told apart by their eyes.
Dr. Nina Byte · Tech & Science CorrespondentThe golden irises have fine black lines, and each frog's pattern is its own, like a fingerprint.
Vera Bullock · Co-AnchorAnd before the eyes, they were doing what?
Dr. Nina Byte · Tech & Science CorrespondentToe-clipping, which can affect survival and behavior. The lead researcher said she was uncomfortable with it, since these frogs climb trees using their limbs.
Vera Bullock · Co-AnchorSo the safer option was just looking at the frog. Which, honestly, is what they should have been doing all along.
Dr. Nina Byte · Tech & Science CorrespondentThey identified one hundred three frogs across three hundred ninety-two captures, and some photos were taken during mating without disturbing them.
Dr. Nina Byte · Tech & Science CorrespondentOnly three frogs were re-identified across years, so long-term stability is unproven.
Vera Bullock · Co-AnchorRating: the frogs get a ten, the toe-clipping gets a performance review.
Vera Bullock · Co-AnchorSo the frogs finally got an ID, and it's the one thing they never had to carry.
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Photo: Gage Skidmore from Surprise, AZ, United States of America · CC BY-SA 2.0 · Wikimedia Commons · altered by BBN, shared under CC BY-SA 2.0
Photo: Achim Raschka ( talk ) · CC BY-SA 3.0 · Wikimedia Commons · altered by BBN, shared under CC BY-SA 3.0
Photo: Evka W · CC BY-SA 4.0 · Wikimedia Commons · altered by BBN, shared under CC BY-SA 4.0
Photo: U.S. Department of Defense · Public domain · Wikimedia Commons · altered by BBN
Photo: Alex Clausen · Public domain · Wikimedia Commons · altered by BBN
From the archive: everything BBN aired on Friday, October 23, 2026 · the U.S. archive · all months
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