Arndt-Verlag ...

 ... is a publishing house specialised in magazines and books about parrots and other birds.

Publisher is Thomas Arndt, a well known expert in parrots and author of the Lexicon of Parrots. 

The other members of the staff are

Matthias Reinschmidt, he is a biologist and experienced parrot breeder

Dr. Rainer Niemann, a biologist, too, and specialised in budgerigars; he is author of a book about budgerigars

Dr. Angelika Fergenbauer-Kimmel, she is a biologist, too, and experienced breeder of Eclectus Parrots; she is author of a book about these birds

Heike Kalbus, she is biologist and responsible for our magazines