Rotfussfalke, Scan einer Stichs aus Brehms Tierleben, 1. Auflage 1863 - 1896, Band 3, Seite 429.
Urheberrechtliche Ansprüche dürften aufgrund des Alters erloschen sein.

Source: https://commons.wikimedia.org/wiki/File:Brehms_Tierleben-1A_BD3_S429-Rotfussfalke.gif

The red-footed falcon (Falco vespertinus), formerly western red-footed falcon, is a bird of prey. It belongs to the family Falconidae, the falcons. This bird is found in eastern Europe and Asia. It is migratory, wintering in Africa. It is a regular wanderer to western Europe.