While flipping logs in the woods on a (relatively) warm Winter day, I sometimes come across invertebrates like this one. Southern Yellowjackets are typically found in the eastern United States and as far south as Mexico and Guatemala. Their territory expands as far west as Texas and as far east as the Atlantic Ocean.
The Southern Yellowjacket is a social wasp. This species can be identified by its distinctive black and yellow patterning and orange queen. This species is predatory and typically eats live insects, but they also feed on the flesh of deceased prey.
Their nests are typically found in unnatural habitats, such as yards, parks and the sides of roads. Mated queens (like this one) overwinter as adults in protected areas and start new colonies in the spring. In some cases, they build their own nest, but more often, they take a different approach.
Since she emerges from hibernation a month or more later than the Eastern Yellowjacket, she simplifies things by finding a recently constructed Eastern Yellowjacket nest. She enters the nest, murders the queen, and appropriates the nest and workers (which don’t seem to mind the change in executive management).
As a form of defense of their nests, Southern Yellowjacket workers use alarm pheromones to communicate with each other to coordinate an attack. These behaviors are chemically mediated, and the alarm pheromones cause many social wasp species to leave the nest and attack whatever may be threatening it.