Freqüència de postes mixtes en el gènere Parus

• Autores: Jordi Baucells Colomer
• Localización: Butlletí del Grup Català d'Anellament, ISSN 1130-2070, Vol. 7, Nº. 1, 1990, págs. 13-17
• Idioma: catalán
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• Resumen

  • Routine inspection of 1O00 nest-boxes from 1985 to 1990 in iwo areas of Catalonia (NE Spain) gave a total of 7 mixed clutches of tits out of 1245 broods (0, 56%). Mixed broods appeared between P. Cristatus and P. Ater (5, 71% P), major and P. Caeruleus (0, 99 %) and beiween P. Caeruleus and P. Ater (0, 14 %). Jhis phenomenon is probably related to intense competition for nest-boxes, and may have implications on possible future hybridization of these species.