The Bot Fly (Cuterebra spp.) is a parasitic fly that can cause warbles in rabbits. Here's how the process typically occurs:

1. Adult Bot Fly: The adult Bot Fly lays its eggs on vegetation or in the surrounding environment.

2. Egg Attachment: The eggs are usually attached to the fur of rabbits when they come into contact with the vegetation where the eggs are deposited.

3. Larval Infestation: The body heat of the rabbit triggers the hatching of the Bot Fly eggs, and the larvae emerge from the eggs.

4. Larval Attachment: The newly hatched larvae are small, and they actively seek out a suitable opening in the rabbit's skin, typically the nostrils or open wounds.

5. Migration: Once the larvae have entered the rabbit's body, they migrate through the tissues, creating tunnels beneath the skin.

6. Warble Formation: As the larvae migrate, they create swollen, raised areas on the skin called warbles. These warbles serve as protective chambers for the larvae to complete their development.

7. Larval Development: Inside the warbles, the larvae continue to grow and develop over a period of several weeks.

8. Pupal Stage: When the larvae are fully developed, they exit the warbles, drop to the ground, and pupate in the soil.

9. Adult Emergence: After a period of pupation, adult Bot Flies emerge from the pupae, starting the life cycle anew.

Warbles can cause discomfort and irritation to rabbits. If you suspect your rabbit has warbles, it's essential to seek veterinary assistance. A veterinarian can provide appropriate treatment, which may involve removing the warbles and treating any secondary infections. Additionally, implementing preventive measures such as keeping rabbits in clean and well-maintained environments and minimizing exposure to areas where Bot Flies are prevalent can help reduce the risk of infestation.