How does the diversity of floral sources impact the nutrition of the Bombus vestalis brood?

Answer

The diet is defined by the foraging preferences of the host workers

Because the parasitic larvae are entirely dependent on the provisioning efforts of the host workers, their nutritional intake is directly linked to the flowers that the host colony visits. Host species like the buff-tailed bumblebee are generalists that visit a wide variety of plants to collect carbohydrates and proteins. Therefore, if the host colony has access to clover, brambles, or thistle, those specific floral sources form the nutritional base for the developing cuckoo larvae. The diet of the cuckoo is not determined by the mother's choice but by the successful foraging habits of the colony being parasitized.

How does the diversity of floral sources impact the nutrition of the Bombus vestalis brood?
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