
BirdBombycillidae
Bombycilla garrulus

Specialist frugivore whose irruptive winter movements into temperate Europe are driven by Rowan mast crop failures in Fennoscandia. Seeds swallowed whole and passed intact (Svensson 1975).

Swallows Yew arils whole, passing the enclosed seed intact. One of the few birds to consume Taxus fruit in significant quantity. A critical dispersal link for a tree with few avian partners.

Feeds extensively on Elder berries during winter irruptions into western Europe, often in large flocks alongside Blackbirds and Fieldfares.