Common cutworm

Agrotis infusa

Agrotis infusa, commonly known as the Bogong Moth, is a moth species native to Australia. Here's an overview of its characteristics and some information on its life cycle:

Overview:

The Bogong Moth (Agrotis infusa) is a nocturnal moth species belonging to the family Noctuidae. These moths are well-known for their remarkable long-distance migrations and their seasonal aggregation in large numbers.

Detailed Appearance:

  1. Adult Moth: The Bogong Moth has a wingspan of about 40–50 mm (1.6–2 inches). The forewings are typically brown with darker markings, while the hindwings are lighter in color.

  2. Caterpillar (Larva): The larval stage, also known as the caterpillar, is typically brown or gray, and it is a soil-dwelling stage.

Life Cycle:

  1. Egg: Adult moths lay eggs during the summer months.

  2. Caterpillar (Larva): The caterpillars hatch from the eggs and feed on plants, including various grasses.

  3. Pupa: After completing their larval stage, the caterpillars pupate in the soil.

  4. Adult Moth: The adult moths emerge from the pupae and are known for their migratory behavior.

Behavior:

One of the notable behaviors of Bogong Moths is their migration to the Australian Alps during the summer months. They aggregate in large numbers in cool, mountainous caves to escape the heat of the lowlands. This behavior is often referred to as "bogonging."

Ecological Significance:

The Bogong Moth is ecologically significant as a food source for various predators, including birds and mammals, in the regions where they aggregate.

Management:

Bogong Moths are not considered agricultural pests, and their migrations and aggregations are part of their natural behavior. However, their presence in large numbers in certain locations can be a concern for building owners and managers due to hygiene and maintenance issues associated with moth droppings.

Efforts are made to address these issues in locations where moths aggregate, such as public buildings, by implementing measures to reduce the impact on infrastructure.

It's important to note that the Bogong Moth plays a vital role in the ecosystem, and conservation efforts are directed toward maintaining their natural behaviors and habitat.