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Colour Rings on Swift Terns

27 May 2014 - 10:00

Swift Terns are one of the few locally-breeding seabirds whose numbers are increasing. To help understand the main factors driving the positive trend of this species, a team of researchers from the Percy FitzPatrick Institute of African Ornithology and the Animal Demography Unit at the University of Cape Town marked 500 Swift Terns chicks from Robben Island in April 2013 and 2014 with metal and individually engraved colour rings. In 2013 members of the public reported how these birds dispersed, providing information on the fledging success, survival and dispersal of juvenile Swift Terns, which were re-sighted from Namibia to the Eastern Cape. 

Gathering dispersal records is a time consuming but important task that relies on assistance from volunteers across southern Africa. 

Rings in 2014 are orange and yellow (with black text) and green and blue (with white text), and are engraved with an “A” followed by a letter and a number (e.g. AU2). Rings from 2013 are yellow and white (with black text) and green and blue (with white text), and bear a code of one letter and one number (e.g. U2).  The majority of the colour rings are top-down and all are on the right leg. Click here for more information on the rings.

If you see any ringed birds please record their location as accurately as possible (ideally GPS), the date and time of sighting, ring colour, letters on the ring (if legible) and age class (juvenile or immature). If a bird is found dead, please also record the number of the metal ring. 

Please send the information to Davide Gaglio: swift.terns@gmail.com

Thanks for your help!