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To better understand how to face to the recurring nuisances caused by the numerous crows in Paris, a study was set up by the National Museum of Natural History at the request of the city's environmental services since July 2015.

It's about capturing and tagging crows, to study their movements and survival.
In 2024, more than 1500 crows have been captured in Paris and fitted with colour rings with a 3-digit code which allows them to be identified when they are relocated. Each year, the general public and ornithologists communicate to the museum 38410 relocations of ringed individuals, especially in Paris and the close suburbs, but also at longer distances.

This website was created to allow observers to report their observations of colour-ringed crows, and to provide access to the history of each ringed bird. You can thus consult the different observations of a bird, by visualizing its places of observation on a map.

Good observations, beautiful explorations and good crows!

The observations of ringed crows of the day 
 
 DateRing codeDepartmentLocalityRoad/SiteObservers  
 18/07/2025   272   ParisPARISJardin des Plantes Elio
 18/07/2025   307   ParisPARISAllée Blaise Cendrars Léa
 18/07/2025   278   ParisPARISJardin Nelson Mandela Léa
 18/07/2025   382   ParisPARISJardin Nelson Mandela Léa
 18/07/2025   272   ParisPARISJardin des Plantes Zoé
 18/07/2025   716   ParisPARISJardin des Plantes Zoé
 18/07/2025   181   ParisPARISJardin Nelson Mandela Virgile Andreani
 18/07/2025   311   ParisPARISJardin Nelson Mandela Virgile Andreani
 18/07/2025   333   ParisPARISJardin Nelson Mandela Virgile Andreani
 18/07/2025   237   ParisPARISAllée Jules Supervielle Virgile Andreani
 18/07/2025   904   ParisPARISJardin Nelson Mandela Virgile Andreani
 18/07/2025   100   ParisPARISParc des Buttes Chaumont Anonymous
 
Top 10 of the most distant
recoveries from ringing
Top 10 of the highest
longevity since ringing
 
Ring codeDistance  
  096   625.625 km
  469   333.628 km
  006   284.871 km
  013   263.734 km
  547   244.899 km
  095   214.178 km
  130   196.161 km
  160   158.433 km
  573   145.596 km
  829   121.490 km
 
Ring codeLongevity /ringing  
  001   3662 jours
  003   3655 jours
  011   3646 jours
  006   3614 jours
  039   3507 jours
  018   3488 jours
  077   3341 jours
  070   3296 jours
  001   3148 jours
  047   3132 jours

  Sources © Arnaud LH - contact site - contact Programme - Crédits photographiques : Marie-Lan Taÿ-Pamart, Yves Gestraud, Frédéric Jiguet