During which time frame is the parasitic female Bombus vestalis most frequently observed while scouting for a nest?
Answer
March to August
The lifecycle of the Bombus vestalis is synchronized with the emergence of its host. The mated queen survives the winter in hibernation and emerges in the spring. Her primary objective upon emergence is to find a suitable nest to parasitize, which requires a window of time during which the host colony is active but not yet too large to be suppressed. While records can vary, the prime period for observing these females is typically from March through August. Within this window, the most critical time for an observer to see the takeover attempt is often during late May or June, when the host nest has enough workers to be worth invading but has not yet grown to a size that makes it difficult for the invader to dominate.
Related Questions
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