Hawfinch

Hawfinch is the biggest bird of the Fringillidae Family. This bird has distinctive heavy silhouette with its “huge” bill and head, and short neck and tail. On the upperparts, the adult male has dark brown mantle and pale buff rump. The upperwing shows conspicuous white wing patches. The flight feathers are black, and the blue primaries have flared tips. This fact is unique in Fringillidae, but maybe they are used in courtship displays.
The underparts are pale pinkish brown. Vent and undertail coverts are white.
On the head, crown, nape and cheeks are buff. The head top is darker. Rear and sides of the neck are pale grey. We can see a black rounded bib. Lores are black. The huge bill is triangular. In breeding plumage, it is blue-black, with bluish-grey base. In winter, the bill is horn-coloured. Eyes are pinkish-brown. Legs and feet are pink.
Female resembles male, but she is duller. She has slaty-grey patch on the secondary feathers. The black bib is slightly smaller than in male. The juvenile has pale greyish-yellow breast, and the underparts are mottled black. It lacks the black bib. Its bill is pale yellowish. The young male shows some black at the base of the bill. Underparts are darker than in adults.
The song is a quiet whistling sound interspersed with call notes, rather guttural, without any musical notes “tchi-tchi…ter-ui-ui”. Hawfinch feeds mainly on seeds taken on the ground or directly from the trees. It catches insects during summer, in order to feed its young. But the Hawfinch is mainly known for feeding the seeds extracted from thick stones, such as olives or cherries. It is able to crack open the shells, thanks to its massive bill and head. The skull is adapted to this feeding behaviour, allowing the strong muscles to manage this work.
https://youtu.be/4o3E5SLrghQ (Hawfinch)