hilltopping
n.— «Several fly species have landmark-based territoriality, especially for their mating swarms, and may return to the same tree by a lake year after year. Male Cuterebra flies, also called botflies, form mating groups on hilltops, waiting for interested females, a ritual called hilltopping. In some species there is lively competition among males to take and hold a prime site.» —“Are Flies Territorial?” by C. Claiborne Ray New York Times Oct. 20, 2008. (source: Double-Tongued Dictionary)
Further reading
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