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--_000_9DBF53D33BAC4E92AF05E0DC4DA5BEABdalca_-- --94eb2c0857b29ac22d055a05bc31 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable By "our", given that this list is NatureNS, not a country wide list, I was referring to Nova Scotia. In 1990, Teskey published part 16 of a great series of books *The Insects and Arachnids of Canada*. He lists: *Chrysops* (deer flies - note this phrase is two words, not one, as for all true flies): 18 species *Hybomytra* and *Tabanus* (the flies most people would recognize as horse flies): 28 species Less obvious horse flies (*Stonemyia, Haematopota, Atylotus*): 6 species Therefore, off the top of my head, I had it right the first time and shouldn't have had the second thoughts. Tabanids (that is, both horse and deer flies), have had more attention paid to them in NS than many other families of insects (but not all, there are some very well researched groups). Both Phil Taylor (Acadia) and I have (separately) worked on them, but most famously, Alexander Graham Bell's grandson, Graham B. (Sandy) Fairchild has, too. I suspect therefore, that of the 52 species in Teskey's book, a few more may be added, but not a lot more. Randy _________________________________ RF Lauff Way in the boonies of Antigonish County, NS. On 24 September 2017 at 02:33, Stephen Shaw <srshaw@dal.ca> wrote: > More like 40 species of Chrysops (deerflies) and 80 species of larger > tabanids (=E2=80=98horseflies=E2=80=99) in 4 genera, east of the Rockies,= according to > Canadian J of Arthropod Identification, parts 1 & 2 (pdf files available > on-line, including images and distribution maps). > > Presumably fewer species if sticking just to N.S. =E2=80=94 maybe there= =E2=80=99s a > checklist of tabanids for N.S.? > > On the likely efficacy of the d=E2=80=99fly hatpin, I=E2=80=99d guess its= deterrence value > is about the same as that of a copper bracelet in deterring arthritis pai= n, > though believing in either probably does little actual harm. > > Steve (Hfx) > > > On Sep 23, 2017, at 4:48 PM, Randy Lauff <randy.lauff@gmail.com> wrote: > > I suspect deer flies, not horse flies are the target for two reasons. One= , > most of our ~30 species of horse flies are too big to be prey to most of > our dragons. So, would they be intimidated by them? Two, our ~20 species = of > deer flies tend to attack the head, whereas the horse flies go lower. > Putting a "predator" on your hat likely works only for flies in that > vicinity. > > Would a fly recognize a predator that isn't moving? Sounds like a science > fair project! > > It's been a while since I've worked on Tabanids, the family which include= s > both of these flies, so I may have the 20 and 30 backwards, above. I thin= k > I do actually. > > Randy > > On Sep 23, 2017 10:37 AM, "James Hirtle" <jrhbirder@hotmail.com> wrote: > > I recently received an email from a friend who says that she has a > dragonfly pin on her hat and this keeps the horseflies away. The premise > is that dragonflies prey on horseflies and this is why. She does not hav= e > to use repellent when horseflies are about since she has been doing this. > Has anyone else tried this method of control and does it work? > > I know at the moment that the store in Petite Riviere has dragonfly pins > for sale on the basis of this and I would definitely buy one or more of > these pins to put on my hat if it does indeed work. Thoughts on this wou= ld > be appreciated. > > > James R. Hirtle > > LaHave > > > > --94eb2c0857b29ac22d055a05bc31 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable <div dir=3D"ltr">By "our", given that this list is NatureNS, not = a country wide list, I was referring to Nova Scotia. In 1990, Teskey publis= hed part 16 of a great series of books <i>The Insects and Arachnids of Cana= da</i>. He lists:<div><br></div><div><i>Chrysops</i>=C2=A0(deer flies - not= e this phrase is two words, not one, as for all true flies): 18 species</di= v><div><i>Hybomytra</i>=C2=A0and <i>Tabanus</i>=C2=A0(the flies most people= would recognize as horse flies): 28 species</div><div>Less obvious horse f= lies (<i>Stonemyia, Haematopota, Atylotus</i>): 6 species</div><div><br></d= iv><div>Therefore, off the top of my head, I had it right the first time an= d shouldn't have had the second thoughts.</div><div><br></div><div>Taba= nids (that is, both horse and deer flies), have had more attention paid to = them in NS than many other families of insects (but not all, there are some= very well researched groups). Both Phil Taylor (Acadia) and I have (separa= tely) worked on them, but most famously, Alexander Graham Bell's grands= on, Graham B. (Sandy) Fairchild has, too. I suspect therefore, that of the = 52 species in Teskey's book, a few more may be added, but not a lot mor= e.</div><div><br></div><div>Randy</div></div><div class=3D"gmail_extra"><br= clear=3D"all"><div><div class=3D"gmail_signature" data-smartmail=3D"gmail_= signature">_________________________________<br>RF Lauff<br>Way in the boon= ies of<br>Antigonish County, NS.</div></div> <br><div class=3D"gmail_quote">On 24 September 2017 at 02:33, Stephen Shaw = <span dir=3D"ltr"><<a href=3D"mailto:srshaw@dal.ca" target=3D"_blank">sr= shaw@dal.ca</a>></span> wrote:<br><blockquote class=3D"gmail_quote" styl= e=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <div style=3D"word-wrap:break-word"> More like 40 species of Chrysops (deerflies) and 80 species of larger taban= ids (=E2=80=98horseflies=E2=80=99) in 4 genera, east of the Rockies, accord= ing to Canadian J of Arthropod Identification, parts 1 & 2 (pdf files a= vailable on-line, including images and distribution maps). =C2=A0=C2=A0 <div><br> </div> <div>Presumably fewer species if sticking just to N.S. =E2=80=94 maybe ther= e=E2=80=99s a checklist of tabanids for N.S.?</div> <div><br> <div>On the likely efficacy of the d=E2=80=99fly hatpin, I=E2=80=99d guess = its deterrence value is about the same as that of a copper bracelet in dete= rring arthritis pain, though believing in either probably does little actua= l harm.</div> <div><br> </div> <div>Steve (Hfx)=C2=A0</div><div><div class=3D"h5"> <div><br> </div> <div><br> <div> <div>On Sep 23, 2017, at 4:48 PM, Randy Lauff <<a href=3D"mailto:randy.l= auff@gmail.com" target=3D"_blank">randy.lauff@gmail.com</a>> wrote:</div= > <br class=3D"m_-6620337842030739377Apple-interchange-newline"> <blockquote type=3D"cite"> <div dir=3D"auto"> <div>I suspect deer flies, not horse flies are the target for two reasons. = One, most of our ~30 species of horse flies are too big to be prey to most = of our dragons. So, would they be intimidated by them? Two, our ~20 species= of deer flies tend to attack the head, whereas the horse flies go lower.=C2=A0 Putting a "predator&quo= t; on your hat likely works only for flies in that vicinity.=C2=A0</div> <div dir=3D"auto"><br> </div> <div dir=3D"auto">Would a fly recognize a predator that isn't moving? S= ounds like a science fair project!</div> <div dir=3D"auto"><br> </div> <div dir=3D"auto">It's been a while since I've worked on Tabanids, = the family which includes both of these flies, so I may have the 20 and 30 = backwards, above. I think I do actually.=C2=A0</div> <div dir=3D"auto"><br> </div> <div dir=3D"auto">Randy=C2=A0<br> <div class=3D"gmail_extra" dir=3D"auto"><br> <div class=3D"gmail_quote">On Sep 23, 2017 10:37 AM, "James Hirtle&quo= t; <<a href=3D"mailto:jrhbirder@hotmail.com" target=3D"_blank">jrhbirder= @hotmail.com</a>> wrote:<br type=3D"attribution"> <blockquote class=3D"m_-6620337842030739377quote" style=3D"margin:0 0 0 .8e= x;border-left:1px #ccc solid;padding-left:1ex"> <div dir=3D"ltr"> <div id=3D"m_-6620337842030739377m_-7836542593846392484divtagdefaultwrapper= " style=3D"font-size:24pt;font-family:Calibri,Helvetica,sans-serif" dir=3D"= ltr"> <p>I recently received an email from a friend who says that she has a drago= nfly pin on her hat and this keeps the horseflies away.=C2=A0 The premise i= s that dragonflies prey on horseflies and this is why.=C2=A0 She does not h= ave to use repellent when horseflies are about since she has been doing this.=C2=A0 Has anyone else tried this method of = control and does it work?</p> <p>I know at the moment that the store in Petite Riviere has dragonfly pins= for sale on the basis of this and I would definitely buy one or more of th= ese pins to put on my hat if it does indeed work.=C2=A0 Thoughts on this wo= uld be appreciated.</p> <p><br> </p> <p>James R. Hirtle</p> <p>LaHave=C2=A0</p> </div> </div> </blockquote> </div> <br> </div> </div> </div> </blockquote> </div> <br> </div> </div></div></div> </div> </blockquote></div><br></div> --94eb2c0857b29ac22d055a05bc31--
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