discussion / Camera Traps  / 18 April 2024

Newt belly pattern for picture-matching


We are investigating the ability to use belly pattern of Great crested newts (Triturus cristatus) at larval stage for picture-matching in capture-recapture studies. Do you have 10 minutes for finding the 20 matches? 



Capture-recapture is the reference method for population estimate of newts, but its only based on reproductive adults (at least 2-3 years old). Using an underwater camera trap NewtCAM we are collecting belly images of newt larvae with a pattern, but it is unknown if it is unique and stable enough for picture-matching. Validating this would mean having the possibility to automate estimates of the reproduction success. 


The survey is in French but basically you need to find the match between the picture on the left and one of the 5 pictures on the right. 

Select "Aucune correspondance" if you believe there is no match. 

You have the possibility to see your results at the end. 

Enjoy and do not hesitate to share the survey! 



Robin Sandfort
@capreolus  | he/him
Capreolus e.U.
wildlife biologist with capreolus.at
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That looks great Xavier.
I´ll do my quiz!
Would be great to compare this later with the 
Danube crested newt (Triturus dobrogicus) ;-)

Greetings from the Danube,

Adrien Pajot
@Adrien_Pajot  | He/His
Fauna & Flora
Hi! I am Adrien, a dedicated French ornithologist and engineer committed to biodiversity conservation. I joined the WILDLABS team as a project manager in October 2023!
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Cool project! (I would definitely match with the second photo on your example). Might be a project that you can run on Zooniverse instead of a Google Form? https://www.zooniverse.org/