[NatureNS] re predation on Banded Woolly Bear Caterpillars

From: Jim Wolford <jimwolford@eastlink.ca>
Date: Fri, 14 Nov 2014 17:07:51 -0400
References: <BAY169-W1283FC95F467280086DDD34FB8C0@phx.gbl>
To: naturens <naturens@chebucto.ns.ca>
Precedence: bulk
Return-Path: <naturens-mml-owner@chebucto.ns.ca>
Original-Recipient: rfc822;"| (cd /csuite/info/Environment/FNSN/MList; /csuite/lib/arch2html)"

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During that period mentioned by Angus, Pat & I walked the west Kentville =
rail trail (east Coldbrook), and we saw at least 4 of the banded =
woolly-bears =97 2 of them were =93sucked out=94 as Angus described, and =
the other 2 were openly crossing the path.  Angus mentioned crab =
spiders, but I=92ll bet that wolf spiders would also be present and =
abundant and more likely to find caterpillars on the ground. =20

Many would-be predators, other than cuckoos, find hairy caterpillars =
difficult to deal with or worse, since often the hairs are reported to =
have irritating qualities, according to sensitive human observers.  So =
just their hairiness might partly explain how they get away with =
movements in open areas =97 and sometimes that open area is a road or =
highway, which would offer no protection!

Parasitoid wasps and flies and the rates of parasitism are further wild =
cards in all of this.

Cheers from Jim in Wolfville.

Begin forwarded message:

> From: Angus MacLean <cold_mac@hotmail.com>
> Subject: [NatureNS] Wooly Bear Caterpillars
> Date: November 14, 2014 at 2:27:20 PM AST
> To: naturens <naturens@chebucto.ns.ca>
> Reply-To: naturens@chebucto.ns.ca
>=20
> =46rom about October 20 to early November, there were large numbers of =
Wooly Bears on the move. On our property without any searching there =
were 20 or more each day into early November when they started to =
lessen. Surprisingly there was little predation that I could find. Since =
they seem to prefer to travel across open areas one wonders how they =
escape predators. The dead ones had their interiors sucked out so likely =
the victims of crab spiders, although there are less likely suspects.
>=20
> Wooly Bears are the larval stage of the Isabella Tiger Moth. I have =
never found this moth. According to the literature. Wooly Bears =
overwinter as "near adult" caterpillars which, I presume, means their =
last instar stage so that in May/early June(??), 2015, there should be =
plenty of Isabella Tiger Moths around. I hope to find one!
> Angus


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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dwindows-1252"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">During =
that period mentioned by Angus, Pat &amp; I walked the west Kentville =
rail trail (east Coldbrook), and we saw at least 4 of the banded =
woolly-bears =97 2 of them were =93sucked out=94 as Angus described, and =
the other 2 were openly crossing the path. &nbsp;Angus mentioned crab =
spiders, but I=92ll bet that wolf spiders would also be present and =
abundant and more likely to find caterpillars on the ground. =
&nbsp;<div><br></div><div>Many would-be predators, other than cuckoos, =
find hairy caterpillars difficult to deal with or worse, since often the =
hairs are reported to have irritating qualities, according to sensitive =
human observers. &nbsp;So just their hairiness might partly explain how =
they get away with movements in open areas =97 and sometimes that open =
area is a road or highway, which would offer no =
protection!<div><br></div><div>Parasitoid wasps and flies and the rates =
of parasitism are further wild cards in all of =
this.<div><div><br></div><div>Cheers from Jim in =
Wolfville.<br><div><br><div>Begin forwarded message:</div><br =
class=3D"Apple-interchange-newline"><blockquote type=3D"cite"><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px;"><span style=3D"font-family:'Helvetica'; color:rgba(0, =
0, 0, 1.0);"><b>From: </b></span><span =
style=3D"font-family:'Helvetica';">Angus MacLean &lt;<a =
href=3D"mailto:cold_mac@hotmail.com">cold_mac@hotmail.com</a>&gt;<br></spa=
n></div><div style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: =
0px; margin-left: 0px;"><span style=3D"font-family:'Helvetica'; =
color:rgba(0, 0, 0, 1.0);"><b>Subject: </b></span><span =
style=3D"font-family:'Helvetica';"><b>[NatureNS] Wooly Bear =
Caterpillars</b><br></span></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span =
style=3D"font-family:'Helvetica'; color:rgba(0, 0, 0, 1.0);"><b>Date: =
</b></span><span style=3D"font-family:'Helvetica';">November 14, 2014 at =
2:27:20 PM AST<br></span></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span =
style=3D"font-family:'Helvetica'; color:rgba(0, 0, 0, 1.0);"><b>To: =
</b></span><span style=3D"font-family:'Helvetica';">naturens &lt;<a =
href=3D"mailto:naturens@chebucto.ns.ca">naturens@chebucto.ns.ca</a>&gt;<br=
></span></div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px;"><span =
style=3D"font-family:'Helvetica'; color:rgba(0, 0, 0, =
1.0);"><b>Reply-To: </b></span><span style=3D"font-family:'Helvetica';"><a=
 =
href=3D"mailto:naturens@chebucto.ns.ca">naturens@chebucto.ns.ca</a><br></s=
pan></div><br><div><div class=3D"hmmessage" style=3D"font-size: 12pt; =
font-family: Calibri; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;"><div dir=3D"ltr">=46rom about October =
20 to early November, there were large numbers of Wooly Bears on the =
move. On our property without any searching there were 20 or more each =
day into early November when they started to lessen. Surprisingly there =
was little predation that I could find. Since they seem to prefer to =
travel across open areas one wonders how they escape predators. The dead =
ones had their interiors sucked out so likely the victims of crab =
spiders, although there are less likely suspects.<br><br>Wooly Bears are =
the larval stage of the Isabella Tiger Moth. I have never found this =
moth. According to the literature. Wooly Bears overwinter as "near =
adult" caterpillars which, I presume, means their last instar stage so =
that in May/early June(??), 2015, there should be plenty of Isabella =
Tiger Moths around. I hope to find =
one!<br>Angus</div></div></div></blockquote></div><br></div></div></div></=
div></body></html>=

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