This guide is based on wikipedia's list of birds of Germany with accidentals removed to keep the guide under 500 entries.
The House Sparrow (Passer domesticus) is a bird of the sparrow family Passeridae, found in most parts of the world. A small bird, it has a typical length of 16 cm (6.3 in) and a weight of 24–39.5 g (0.85–1.39 oz). Females and young birds are coloured pale brown and grey, and males have brighter black, white, and brown markings. One of about 25 species in the genus Passer, ...more ↓
The Eurasian Tree Sparrow (Passer montanus) is a passerine bird in the sparrow family with a rich chestnut crown and nape, and a black patch on each pure white cheek. The sexes are similarly plumaged, and young birds are a duller version of the adult. This sparrow breeds over most of temperate Eurasia and Southeast Asia, where it is known as the Tree Sparrow, and it has ...more ↓
The White-winged Snowfinch (Montifringilla nivalis), or just Snowfinch, is a small passerine bird. Despite its name, it is a sparrow rather than a true finch.