From his twenty-second year he devoted himself to botany. The upland and valley flora of the Eastern Alps was his chief study. To find specimens, Wulfen frequently hiked up the
Großglockner and was a pioneer in exploring the Austrian Alps. In 1781, he published his studies in the well-illustrated
Plantae rariorum Carinthicae (Rare Plants of
Carinthia). With particular success, he conducted research of
lichens that he still regarded as a division of
algae. He made numerous trips to the south (on many occasions to the Adriatic Sea) and to the north as far as Holland. Wulfen was also a researcher of the fauna of the
Inner Austria and the
Adriatic Sea. He concerned himself primarily with insects, fish, and birds. ==Recognitions and commemoration==