Vernal colletes, an adult hymenopteran species, possesses a mild venom administered through its sting, used primarily as a defense mechanism. Humans may encounter the venom during accidental contact. While the sting's toxins are not potent, they can induce localized pain and swelling. No severe long-term effects are typical, ensuring minimal toxic risks to humans.

The vernal colletes uses its sting primarily as a defense mechanism and occasionally to subdue prey. Its venom has a mild toxicity level and is most potent in the adult stage. Humans may experience temporary pain and swelling when stung. Similar reactions can occur in domestic pets such as dogs and cats, though smaller mammals might exhibit more intense symptoms. Larger animals like horses may show discomfort but typically have lesser reactions due to their size and physiological differences.