Les troglodytes mignons d'Écosse évoluent vers de nouvelles espèces sur les îles

28 mai 2026

Rapporté par l'IA

Les minuscules troglodytes mignons des îles écossaises isolées deviennent beaucoup plus grands que leurs congénères du continent et développent des caractéristiques distinctes qui pourraient mener à l'apparition de nouvelles espèces.

Des chercheurs de l'université de Birmingham ont étudié quatre populations isolées de troglodytes mignons en Écosse, notamment celles des Shetland, de Fair Isle, des Hébrides extérieures et de Saint-Kilda. Les oiseaux de Saint-Kilda pèsent désormais entre 13 et 16 grammes, contre 7 à 10 grammes pour les oiseaux du continent en Grande-Bretagne. Les plus grands troglodytes de Saint-Kilda sont plus de deux fois plus gros que les plus petits spécimens continentaux.

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samedi 13 juin 2026 05h45