Blackberry Aphid (likely)

Found on the undersides of leaves on cultivated and wild blackberries or raspberries

Herbivorous, sucking sap from the stems and leaves of host plants

They are pear-shaped and slow-moving, often congregating in large colonies to feed; they reproduce quickly during warm months

A common garden pest that can cause leaf curling or stunted growth in plants, but they provide a vital food source for beneficial insects like ladybugs and lacewings