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Competition between male hoverflies? (2)

Observed: 12th October 2012 By: grant burleighgrant burleigh’s reputation in Invertebratesgrant burleigh’s reputation in Invertebratesgrant burleigh’s reputation in Invertebratesgrant burleigh’s reputation in Invertebratesgrant burleigh’s reputation in Invertebrates
023 (11)
029 (8)
DppJpg
Description:

see Comment
Specimen images on E. balteatus. Relevant previous posts include "Hoverfly in wooded area (1)" and "Hoverfly in wooded area (2" (iSpot 16/12/2012).

Identifications
Species interactions

No interactions present.

Species with which Marmalade hoverfly (Episyrphus balteatus) interacts

Comments

grant burleigh's picture

Hoverflies

The hypothesis that I have provisionally arrived at, and that, hopefully, will underpin observations in 2013, is that these male hoverflies perch on and subsequently return to leaves of trees and bushes. In the interim, they compete in the air for priority in mating with females according to some measure of status – size/momentum perhaps, or endurance, or pheromone generation. It may well happen that such interactions are interrupted by males of other Diptera. They could also be occurring in the hovering Muscid, Hydrotaea [see Dipterists (Identification) Forum: Hovering fly (4)].