Huge number of butterflies practically invaded Kyiv on June 4. This quantity of insects appeared due to the early and warm spring which led them to pupate almost simultaneously, Vallery Korneev explained, Hromadske reported.
“The kells were developing during a week, until the wings and legs formed. And immediately after a heavy rain, all the cocoons dehisced and all the imagoes (adult insects) appeared simultaneously this morning.
