Antennae are long, thin sensory organs found on the heads of many insects, such as butterflies and beetles. They help these creatures detect smells, tastes, and even changes in the environment. Antennae can vary in shape and size, allowing different species to adapt to their surroundings and find food or mates more effectively. In addition to insects, some animals like crabs and lobsters also have antennae. These appendages serve similar purposes, helping them sense their environment underwater. Overall, antennae play a crucial role in the survival of many species by enhancing their ability to interact with the world around them.