Eurasian hobby
Herman's multifaceted scientific work and political engagement began with the period 1864–1872 in Kolozsvár. He produced his first major scientific work here on the Eurasian hobby, which was published in 1865 under the title "Falco subbuteo Linné". He wrote a number of popular works in Kolozsvár, for example, "The Art of the Spider" appeared in the 1866 Kolozsvár Almanach. Brassai and Herman had were almost identical in appearance. both wearing shoulder length hair and long beards. The striking exterior masked people who wanted to know and experience everything, especially the life of animals in natural surroundings. However, the two scientists did not share the same character: Brassai loved to spend time on the details, while Herman sought out great generalizations, delving into details only to support his arguments.