One day activity pattern of the grasshopper species Paratettix meridionalis (Orthoptera : Tetrigidae)

The behavior of Paratettix meridionalis (Rambur 1838) was recorded for one day in S' Portugal. Activities were positively correlated with temperature and negatively correlated with relative air humidity. FF spent most of thei r time eating algae, only interrupted by short excursions. MM walked signif icantly more, they only paused for short eating periods. This walking appar ently served to find a mating partner: as soon as they noted a possible par tner, they approached and tried to copulate without any sign of mating cere mony. Most copulation efforts failed: only one successful copulation was ob served which lasted for 11 min.