From 1971 to 1985 he was the Director of the Consiglio Nazionale delle Ricerche's Centro di Studio per la Faunistica ed Ecologia Tropicali.
Pardi was the first to scientifically describe dominance and rank order in wasps, based upon the species Polistes gallicus.
About ten years after the first studies on the behavior of wasps, Pardi began a new line of research, that of orientation in littoral animals.
The discovery of Talitrus orientation led to the extension of research work to a large number of animals belonging to different groups and living in a variety of ecotones.
He wrote a monograph on the fat body of insects[6] and a paper on fertilized egg development in a tetraploid-parthenogentic strain of the moth Solenobia triquetrella.