NB: iedereen kan de opnamen natuurlijk vergelijken met het repertoire dat op xeno_canto is te vinden; een lange reeks mooie sonagrammen van pimpel is in het Handbuch van Glutz (deel 13/1) opgenomen

For those wondering why the website moderators changed (rightly or wrongly) this bird's name from Pleske's Tit into tianschanicus/yenisseensis Azure Tit:

it was because Cees S Roselaar, author of an as yet unpublished book on Palearctic birds, suggested or, rather, concluded the following:

it is "subspecies tianschanicus from the eastern Tienshan (east of 76°E), or perhaps from the western population of yenisseensis (not the eastern 'apeliotes', which has less white in the tail), certainly not a hybrid C cyanus / hyperrhyphaeus x C caeruleus ('pleskei'); the vague slightly yellow-tinted chest possibly shows some influence from flavipectus (western Tienshan, the area where our Hume's Leaf Warblers come from), but not nearly deep sulfur-yellow enough for true flavipectus; tianschanicus and flavipectus hybridize between 74° and 76°E in the Kirghizskiy Khrebet/Mts, but also east from here some tianschanicus sometimes have some yellow / pale buff on the chest. Tianschanicus and yenisseensis are somewhat migratory, but mostly altitudinal from the mountains into the lowlands; the main distribution of both lies in China."

NB: the only other report of tianschanicus for Europe concerns an ancient specimen (now in the American Museum, New York, USA) collected in Germany on 12 October 1821 (following a check in 1975, it was considered to be an escaped cage bird).

Arend Wassink gaf me zojuist een internetlink voor een foto uit NW China van een Azuurmees met gele borst (meer geel dan in Bergen): uit het gebied van tianschanicus maar op 88'E, dus ver ten oosten van het door Cees vermelde hybridisatiegebied met flavipectus.