This guide is based on wikipedia's list of birds of Germany with accidentals removed to keep the guide under 500 entries.
The Merlin (Falco columbarius) is a small species of falcon from the Northern Hemisphere. A bird of prey once known colloquially as a Pigeon Hawk in North America, the Merlin breeds in the northern Holarctic; some migrate to subtropical and northern tropical regions in winter.
The Peregrine Falcon (Falco peregrinus), also known as the Peregrine, and historically as the Duck Hawk in North America, is a widespread bird of prey in the family Falconidae. A large, crow-sized falcon, it has a blue-grey back, barred white underparts, and a black head and "moustache". As is typical of bird-eating raptors, Peregrine Falcons are sexually ...more ↓
The Eurasian Hobby (Falco subbuteo), or just simply Hobby, is a small slim falcon. It belongs to a rather close-knit group of similar falcons often considered a subgenus Hypotriorchis.
The Common Kestrel (Falco tinnunculus) is a bird of prey species belonging to the kestrel group of the falcon family Falconidae. It is also known as the European Kestrel, Eurasian Kestrel, or Old World Kestrel. In Britain, where no other brown falcon occurs, it is generally just called "the kestrel".