So the asynchronous nature of
Aeshna umbrosa is natural while the other four are all synchronous by nature. Are there major differences in environmental niche the 4 inhabit vis-a-vis
Aeshna umbrosa? Seems it would have to be if the photoperiod is the determinant.
Unless ...
What is the timeline in the natural habitat for each species? Do they develop at different times during the season? Timed with predation?
What of the possibility that
Aeshna umbrosa was late to the evolutionary party and this asynchronous timing was advantageous due to competition?
I'm just spouting.
I'm not a bug guy. I have no idea what I'm talking about. But this is interesting.
Edited by AZPaul3, : No reason given.
Eschew obfuscation. Habituate elucidation.