What mechanism ensures that the larvae of the Bombus vestalis are fed?
Answer
Host workers mistake the parasitic larvae for their own and provide food
The success of the parasitic lineage relies on a manipulation of the host colony's social instincts. Because the parasitic queen has successfully established her eggs within the host nest, the host workers continue their natural instinct to provision the brood. They are unable to distinguish the foreign cuckoo larvae from their own, and consequently, they continue to gather nectar and pollen, feeding these resources to the cuckoo larvae throughout their development. This allows the cuckoo bee to grow and mature without the mother ever needing to gather food for her young.

Related Questions
Which species serve as the primary hosts for the Vestal Cuckoo Bumblebee?How does the Bombus vestalis queen typically gain control of a host nest?Why is the foraging behavior of a Bombus vestalis queen different from that of a standard social bumblebee?What mechanism ensures that the larvae of the Bombus vestalis are fed?How does the diversity of floral sources impact the nutrition of the Bombus vestalis brood?What is the primary conservation requirement to support the Vestal Cuckoo Bumblebee?What happens if a sudden environmental shift, such as a drought, occurs in the habitat of the host colony?How does the Vestal Cuckoo strategy represent a form of social parasitism?What is the primary purpose of the Bombus vestalis queen foraging during the early spring?Why is the presence of nectar-rich flowers considered indirect support for the Vestal Cuckoo?