| Summary: | Vuitè informe anual que presenta el Comitè de Rareses Ornitològiques a Mallorca i Formentera. S'han presentat 27 registres, corresponents a 11 espècies, de les quals s'homologuen 25 registres (el 92%). S'homologa per primera vegada el paràsit coaample Stercorarius pomarinus, boscaler Locustella luscinioides i hortolà blanc Plectrophenax nivalis. També s'hi inclouen, nou observacions a Balears homologades pel Comité de Rarezas de la Sociedad Española de Ornitología, en destaquen quatre registres homologats per primera vegada per a Balears, el tàntal aficà Mycteria ibis, juia gregària Vanellus gregarius, ull de bou de Schwarz Phylloscopus schwarz i hortolà capnegre Emberiza melanocephala. La resta d'observacions són la titina de Richard Anthus richardi, ull de bou de dues retxes Phylloscopus inornatus, menjamosques de collar Ficedula albicollis, pinsà carminat Carpodacus erythrinus i hortolà petit Emberiza pusilla. Homologation of bird rarities in Mallorca and Formentera. Report 1998. Eighth annual report by the Rarities Committee on Mallorca and Formentera. The number of records received has been 27 corresponding to 11 species, of which 25 have been homologated, representing 92%. The report records for the first time Pomarine Skua Stercorarius pomarinus, Savi's Warbler Locustella luscinioides and Snow Bunting Plectrophenax nivalis. Also there are included nine records of the Balearic Islands homologated by the Rarities Committee of the Spanish Ornithological Society (SEO) of which four have been homologated for the first time in the Balearic Islands, Yellow-bill Stork Mycteria ibis, Sociable Plover Vanellus gregarius, Radde's Warbler Phylloscopus schwarzi and Black-headed Bunting Emberiza melanocephala. The rest of the records are Richard's Pipet Anthus richardi,Yellow-browed Warbler Phylloscopus inornatus, Collared Flycatcher Ficedula albicollis, Scarlet Rosefinch or Common Rosefinch Carpodacus erythrinus and Little Bunting Emberiza pusilla.
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