I’m growing some potted English oak trees and one of them has some of these cool little galls

I’m growing some potted English oak trees and one of them has some of these cool little galls on the leaves. These hatch into male and female wasps, which mate, lay eggs which become a totally different looking gall, which overwinter into an agamic generation that lays eggs without mating, which become these galls. Super weird cycle, but cool! -- source link

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