"Thrips are tiny insects, typically just a millimetre in length. Some are barely half that size. If that’s how big the adults are, imagine how small a thrips’ egg must be. Now, consider that there are insects that lay their eggs inside the egg of a thrips."
I remember these from my food sciences lab in college: We took frozen commercial blackberries and did extractions to count insect parts - a few fly parts and LOTS of thrips, which hide out in the berries. I must have eaten million of these with all the organic blackberries and raspberries I've eaten!