saker falcon (Falco cherrug) English: « Falco sacer » = Falco cherrug (Saker Falcon) - egg
Français: « Falco sacer » = Falco cherrug (Faucon sacre) - œuf
Date 1860
Source The Ibis, ser. 1, vol. 2
Author William Chapman Hewitson (1806–1878)  
Source: https://commons.wikimedia.org/wiki/File:Falco_cherrug_egg_1860.jpg
The saker falcon (Falco cherrug) is a large species of falcon. This species breeds from eastern Europe eastwards across Asia to Manchuria. It is mainly migratory except in the southernmost parts of its range, wintering in Ethiopia, the Arabian peninsula, northern Pakistan and western China.