Which type of pheromone smells like lemon oil and is used during swarming?

The type of pheromone that smells like lemon oil and is used during swarming is the attractant pheromone. This pheromone plays a critical role in the behavior of bees, particularly in the context of swarming, where a colony prepares to split and form a new colony.

Attractant pheromones help communicate the location of a new nest site and encourage the gathering of bees in that specific area. The pleasant lemon oil scent serves as a signal that draws other bees to the swarm, facilitating the process of creating a new hive. This type of pheromone is particularly crucial as it helps in managing colony movement and ensuring that the worker bees can effectively follow and congregate around the queen and the rest of the swarm during this pivotal moment in a bee colony's life cycle.

In contrast, other pheromones mentioned, such as trail, aggregation, and courtship pheromones, serve different functions. Trail pheromones are involved in directing bees to food sources, aggregation pheromones are used to group bees together for various purposes, and courtship pheromones relate to mating behaviors. Thus, each type of pheromone has its own distinct role within the hive and in the broader behaviors of bees.