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Index of Subjects
Index of Subjects --_000_9DBF53D33BAC4E92AF05E0DC4DA5BEABdalca_ Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable More like 40 species of Chrysops (deerflies) and 80 species of larger taban= ids (=91horseflies=92) in 4 genera, east of the Rockies, according to Canad= ian 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. =97 maybe there=92s a che= cklist of tabanids for N.S.? On the likely efficacy of the d=92fly hatpin, I=92d guess its deterrence va= lue is about the same as that of a copper bracelet in deterring arthritis p= ain, 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<mailto:rand= y.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 ou= r dragons. So, would they be intimidated by them? Two, our ~20 species of d= eer flies tend to attack the head, whereas the horse flies go lower. Putti= ng 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 f= air project! 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. Randy On Sep 23, 2017 10:37 AM, "James Hirtle" <jrhbirder@hotmail.com<mailto:jrhb= irder@hotmail.com>> wrote: I recently received an email from a friend who says that she has a dragonfl= y pin on her hat and this keeps the horseflies away. The premise is that d= ragonflies prey on horseflies and this is why. She does not have to use re= pellent when horseflies are about since she has been doing this. Has anyon= e else tried this method of control and does it work? I know at the moment that the store in Petite Riviere has dragonfly pins fo= r 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 would be a= ppreciated. James R. Hirtle LaHave --_000_9DBF53D33BAC4E92AF05E0DC4DA5BEABdalca_ Content-Type: text/html; charset="Windows-1252" Content-ID: <168417BB145D6F49ABC1E9307E9B90C8@CANPRD01.PROD.OUTLOOK.COM> Content-Transfer-Encoding: quoted-printable <html> <head> <meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DWindows-1= 252"> </head> <body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin= e-break: after-white-space;"> More like 40 species of Chrysops (deerflies) and 80 species of larger taban= ids (=91horseflies=92) in 4 genera, east of the Rockies, according to Canad= ian J of Arthropod Identification, parts 1 & 2 (pdf files available on-= line, including images and distribution maps). <div><br> </div> <div>Presumably fewer species if sticking just to N.S. =97 maybe there=92s = a checklist of tabanids for N.S.?</div> <div><br> <div>On the likely efficacy of the d=92fly hatpin, I=92d guess its deterren= ce value is about the same as that of a copper bracelet in deterring arthri= tis pain, though believing in either probably does little actual harm.</div= > <div><br> </div> <div>Steve (Hfx) </div> <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">randy.lauff@gmail.com</a>> wrote:</div> <br class=3D"Apple-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. Putting a "predator&quo= t; on your hat likely works only for flies in that vicinity. </div> <div dir=3D"auto"><br> </div> <div dir=3D"auto">Would a fly recognize a predator that isn't moving? Sound= s 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 fami= ly which includes both of these flies, so I may have the 20 and 30 backward= s, above. I think I do actually. </div> <div dir=3D"auto"><br> </div> <div dir=3D"auto">Randy <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; <jrhbirder@hotmail.com&g= t; wrote:<br type=3D"attribution"> <blockquote class=3D"quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc= solid;padding-left:1ex"> <div dir=3D"ltr"> <div id=3D"m_-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. The premise i= s that dragonflies prey on horseflies and this is why. She does not h= ave 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?</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. Thoughts on this wo= uld be appreciated.</p> <p><br> </p> <p>James R. Hirtle</p> <p>LaHave </p> </div> </div> </blockquote> </div> <br> </div> </div> </div> </blockquote> </div> <br> </div> </div> </body> </html> --_000_9DBF53D33BAC4E92AF05E0DC4DA5BEABdalca_--