Shelduck
Shelduck (Tadorna Tadorna )
Shelduck is the name of a genus of geese birds, which is attributed to the subfamily of half geese. The name Kasarka is borrowed from Russian. However, in Russian, this term refers to the geese of the genus Branta.
The views expressed in this subfamily seven species are characterized by high uniformity in morphology, behavior and ecology of. The species live on the waters edge zone and combine features Gründel Direction ducks the shallow water zone and the geese grazing the adjacent pastures. Especially in the breeding season are shelduck as very aggressive. The females then males to exaggerate their to sell other birds or counterparties from the incubator area. One way of Schopfkasarka, has not been seen since 1964 and is probably extinct.
In their appearance they differ conspicuously from the ducks typical habit. The calculated to the shelduck species are larger and long-legged as ducks and similar in appearance so that geese. The two occurring in the Palaearctic species Ruddy Shelduck and Shelduck are accordingly called goose. Only occasionally also referred to as the Shelduck.
Species
We distinguish between the following types:
- Ruddy Shelduck ( T. ferruginea )
- Paradieskasarka ( T. variegata )
- Shelduck ( Tadorna T. )
- Graukopfkasarka ( T. cana )
- Australian Kasarka ( T. tadornoides )
- Radjahgans (Tadorna radjah )
- Schopfkasarka (Tadorna cristata )