Common Kestrel

White ring with a black four alpha-numeric code (first letter C) and metal ring.

note 1 : up to 2014, total 1253 rings delivered during 2008-2014.

note 2 :

Green ring with a white three alpha-numeric code and metal ring. 

note 1 : all birds ringed in the León province (Spain).

Combination of one c-ring.

note 1 : since 2005 some 2500 birds were ringed.

note 2 : most of birds have a red ring under or above the metal ring.

Combination of a c-ring with a white two alpha-numeric code (on left leg) and metal ring (on right leg).

Combination of a c-ring with a white three alpha-numeric code (on right leg) and metal ring (on left leg).

Combination of a c-ring with a white two alpha code (on right leg) and metal ring (on left leg).

note 1 : metal ring is violet.

note 2 : blue rings have been used for 200 birds.

note 3 : birds ringed (violet ring on left leg) during even-numbered years 2008, 2010, 2012.

c-ring with a 2 letter code (on tarsus) and metal ring (on other tarsus).

note 1 : c-rings are 16 mm high with colour : green (2006), red (2007), blue (2008) and code in white, while yellow (2009) and code in black.

note 2 :  the project was started in 2006. Birds are ringed in Switzerland as adults to study emigration, immigration and philopatry.

White ring with a black three alpha-numeric code and metal ring.

note 1 :

Green ring with a thee alpha-numeric code and metal ring.

note 1 :

Combination of a white wingtag with a black alpha-numeric code and a green ring (on left leg).

note 1 : birds ringed as ad. or juv. during 2009 on the Tenerife Island (leeward xerophytic scrub).

Combination of a uncoded wingtag (two colours on each wing) and a white ring with a black 3 alpha-numeric code (starting letter "C").

note 1 : used colours are : white, orange, green, yellow, blue, gray.
note 2 : each bird has an unique combination.
note 3 : birds are marked with thes wingtags because they are equipped
with geolocators that need to get back in order to dowload the data. Therefore
all the sightings of these birds are especially valuable !
note 4 : birds can be succesfully reported by only reading the tag and not necessary the colour-ring.    
note 5 : project runs since 2011.

White ring with black 3 alpha-numeric code (starting letter "C").

note 1: about 1100 since 2008 ringed.