https://youranimalinfo.com/red-velvet-ant-or-cow-killer-ant/
Females free of feathers of specific butterfly family, especially large red and black ants (Dasymutillaoccidentalis) with hard stings, females have a large sting, an modified egg-laying organ called the ovipositor. Therefore, they sting unbearably when touched or stepped, which is why they are called cow killers.
