An analysis of more than 500 sites distributed worldwide finds that declines in the abundance of terrestrial insects are attributable mainly to decreases in species that were formerly abundant, rather than being the result of losses of rare species.
I'm not surprised. An instance of this would be the monarch butterfly which was abundant when I was a child. Then there were years where no one saw them and they even were presumed extinct in our area. Finally in 2016 I saw them again in a different part of the same state I was living at the time, and slowly they returned. But the overall volume of insect life in general is down. I would guess a large part of it is owing to both destruction of habitat and excessive use of pesticides. Suburbanization in my region has accelerated this process.
I'm not surprised. An instance of this would be the monarch butterfly which was abundant when I was a child. Then there were years where no one saw them and they even were presumed extinct in our area. Finally in 2016 I saw them again in a different part of the same state I was living at the time, and slowly they returned. But the overall volume of insect life in general is down. I would guess a large part of it is owing to both destruction of habitat and excessive use of pesticides. Suburbanization in my region has accelerated this process.