The female Velvet Ant packs arguably the most painful sting of any North American insect. The Cow Killer Velvet Ant is said to have a sting painful enough to kill a cow, however I am sure that Myth Busters could put that claim to rest. The males of most species are winged, and colored differently than the females. The species I have encountered "squeak" when in distress. These insects can be collected with a jar or a sweep net. They seem to prefer dry, arid soil.