In 1838, Tschudi travelled to
Peru, where he remained for five years exploring and collecting
plants in the
Andes. He moved to
Vienna in 1843. In 1845, he described 18 new species of South American reptiles. Between 1857 and 1859, he visited
Brazil and other countries in
South America. Tschudi wrote a textbook on Peru titled
Peruvian Antiquities in which he recorded various aspects of Peruvian life and history. In the book, he explained the various skull angles of Peruvians in the context of the
Angle of Camper. Tschudi claimed that Camper's facial angles were an "important angle in anthropology", whose "greater or less opening indicates the intellectual superiority of a race, and, up to a certain point, of individuals". He included engravings of a mummified foetus found near
Tarma to argue that the cranial shape of the
Huancas was not the result of cultural practices after birth. ==Diplomatic career==