**Update** These creatures that were taken out of the rabbit's neck are Botfly larvae! Rabbit botflies (Cuterebra) have a life cycle that involves parasitic larvae developing in wild rabbits. The adult female botfly lays eggs near rabbit burrows or runways. When a rabbit (or other animals) passes by, the eggs hatch and the larvae enter the rabbit through natural openings or wounds. The larvae then develop under the rabbit's skin, creating warbles (swellings) before exiting to pupate in the soil.