[NatureNS] Queen Bee

From: Mary Macaulay <marymacaulay@hotmail.com>
Date: Sun, 5 Jul 2015 20:10:23 -0300
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Dragonflies are the most fascinating of insects. Love them!

With kindest regards,

Mary (Macaulay), P.Eng.
Owner
Remember Adventures
RememberAdventures.ca
Now Open for Buggy rentals, picnics, pollinator meadow & games !!
Main Street & Trans-Canada Trail
Tatamagouche
1-902-293-1533
Twitter @RememberAdventures & @InsectRecovery


> On Jul 5, 2015, at 2:23 PM, Phil Schappert <philjs@eastlink.ca> wrote:
>=20
> At 3:58 PM +0000 7/5/15, Stephen Shaw wrote:
>> The Xerces outfit (see url below from Peter) has quite a wide mandate.
>=20
> The founder of the Xerces Society, Bob Pyle, was (and still is) a hero of m=
ine. His book, the Audubon Society Handbook for Butterfly Watchers, was a go=
dsend for me in the mid-80s and should be required reading for any/all butte=
rfly watchers...
>=20
>> I'd heard about one species (Anax junius), but was surprised to learn fro=
m the Xerces site that they know or suspect that at least 5 species of drago=
nfly are north-south migratory, like some populations of the monarch butterf=
ly.  Most of the monarch populations world-wide are non-migratory, and surpr=
isingly, molecular phylogeny reveals that the migratory habit of the North A=
merican groups apparently developed as a later offshoot in evolution, not ea=
rly.
>=20
> I don't find it particularly surprising that many dragonflies are migrator=
y, only that it took us so long to figure it out (!). For more info about dr=
agonfly migration, I urge folks to visit the Migratory Dragonfly Partnership=
 site at http://www.migratorydragonflypartnership.org/index/welcome
>=20
> The migratory habit (I use "migration" loosely when in comes to Monarchs s=
ince they are only one-way migrants) in North American Monarchs is likely du=
e to a single factor, the natural north temperate (seasonal and continental)=
 range of Asclepias syriaca, the "common" milkweed. I think that Monarchs ar=
e best considered "re-colonists" in their spring northward movements since t=
hey follow the seasonal emergence of milkweed and "leap-frog" over preceding=
 generations.
>=20
> The Danaids, as a whole, are almost entirely restricted to the tropics exc=
ept for two species, D. plexippus (the Monarch) and D. gilippus (the Queen),=
 however, the Queen is a far more recent arrival, dependent on the rapid inc=
orporation of A. curasavicca (the tropical milkweed) into gardens across muc=
h of North America. The Queen is now known to "migrate" as far north as New J=
ersey in some years. There are many other migrants in the Danaidae, includin=
g the Blue Crow (Euploea core), which congregate seasonally in roost sites d=
ue to seasonal changes in moisture regimes (eg. dry and wet seasons), all WI=
THIN the tropics.
>=20
> Phil
>=20
> --=20
>=20
> Phil Schappert, PhD
>=20
> 27 Clovis Ave.
> Halifax, NS, B3P 1J3
>=20
> philschappert.ca
> imaginaturestudio.ca
> imaginaturestudio.blogspot.ca
> philschappert.com
>=20
> "Just let imagination lead, reality will follow through..."
>                                       (Michael Hedges)

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