cvrčak

1. cicada
   Po podnevnoj vrućini cvrčci su cvrčali na borovima. — In the midday heat, cicadas were chirping in the pine trees.
   Deca znaju basnu o cvrčku i mravu. — Children know the fable of the cicada and the ant.
2. cricket
   Leti uveče u dvorištu čujemo cvrčke. — On summer evenings we hear crickets in the yard.

Can refer to either a cicada (which sings on trees in the summer heat) or a cricket; both meanings are in general use. Other words for cricket are zrikavac and popac. The Serbian fable 'Cvrčak i mrav' corresponds to La Fontaine's 'The Cicada and the Ant' (Russian 'Стрекоза и муравей').