I guess you never heard of Trigona hypogea, a South American bee that not only collects meat from animal carcasses, but has more recently been discovered to have a taste for live prey as well.
Scientists have seen the bees swiftly raid recently abandoned wasp nests, carrying off wasp eggs, larvae, and pupae until the nest is empty. They’ve observed the bees collecting toad eggs too.
All developing, young bees need protein. Pollen is actually very rich in protein. The adults of most bee species feed predominantly on nectar and save the pollen for their younger colony members. These South American bees simply require a different source of protein. Their anatomy reflects their different eating habits.
The leg modifications that enable most bee species to transport pollen are largely diminished on these bees. Their mouthparts are sharper, sort of tooth-like.
The bees prepare the meat for later consumption by the younger members of the colony by chewing it and then mixing it with sugary liquids, perhaps collected from fruit. Microbes break the mixture down into a viscous goo, which delivers important nutrients to the young bees.