This guide is based on wikipedia's list of birds of Germany with accidentals removed to keep the guide under 500 entries.
The European Bee-eater (Merops apiaster) is a near passerine bird in the bee-eater family Meropidae. It breeds in southern Europe and in parts of north Africa and western Asia. It is strongly migratory, wintering in tropical Africa, India and Sri Lanka. This species occurs as a spring overshoot north of its range, with occasional breeding in northwest Europe.
The Common Kingfisher (Alcedo atthis) also known as Eurasian Kingfisher, or River Kingfisher, is a small kingfisher with seven subspecies recognized within its wide distribution across Eurasia and North Africa. It is resident in much of its range, but migrates from areas where rivers freeze in winter.