[Odonata-l] effect of rain on ode numbers?
Paul M. Brunelle
pmb at ns.sympatico.ca
Tue Oct 9 19:45:05 PDT 2007
Hello All;
I suspect rain (and the frequently attendant high wings up here in
the Maritimes) does cause mortality in odonates - perhaps leaving
them vulnerable to birds and other warm-blooded predators, or perhaps
just weakening them by preventing them from feeding for extended
periods.
A related issue is that only two species I am familiar with in
Acadia actually continue their activities in rain, at least light to
moderate rain without heavy winds.
Aeshna eremita seems indifferent to light to moderate rain -
continuing feeding and ovipositing.
Basiaeshna janata males continue to forage and to look for females -
I have seen a male frantically moving from one raindrop ripple to the
next on a lake surface - presumably interpreting each as a possible
laying female
Cordially,
Paul
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Paul M. Brunelle, B.Des., FGDC
4 Hilltop Terrace, Dartmouth, Nova Scotia, Canada, B2Y 3T1
Phone: 902-423-1845
Email: pmb at ns.sympatico.ca
Fellow of the Society of Graphic Designers of Canada
Research Associate, New Brunswick Museum
Research Associate, Nova Scotia Museum
Coordinator, Maine Damselfly and Dragonfly Survey
Regional Coordinator, Atlantic Dragonfly Inventory Program
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