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< --Apple-Mail-1-39119679 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 Thanks Steve. I'm not concerned that much with the identification aspect - I just = liked the visual effect of the motion and the evening sunlight. Hope to = use it in one of my videos. Thanks all. Paul. On 2016-06-13, at 1:41 AM, Stephen Shaw wrote: > It doesn=92t look like two species but instead a gradation of just = one, explained by the ones nearest the camera subtending a larger angle = at the lens and so appearing bigger. They are flying so fast that you = can=92t see any detail except that the nearer ones look a bit yellowish. = I=92d guess they are a species of fly. >=20 > A number of true flies (Diptera) from quite different phylogenetic = levels typically assemble at the highest local point, known as = =91hilltopping', where the males form swarms and females fly through the = pack to be pursued by males for mating. Well known examples are some = bibionids (sometimes called 'March flies=92 in Britain from their early = appearance, when it=92s too cold here) from the ancient end of the = Diptera, and some empidids (=91dance flies=92) from about half way up. > Trees are not useful =97 you=92d need still photos of individual = insects to have any hope of identifying even whether they are dipterans = or something else. Take a net or even a fly swatter next time? > Steve (Hfx) > =20 > On Jun 12, 2016, at 8:55 PM, Paul Ruggles <cpruggles@eastlink.ca> = wrote: >=20 >> Thanks Paul and Andrew. >> It was not over water. It was along a paved road at Mason's point at = the top of a hill that overlooked Saint Margarets Bay. Would the = identity of the trees be of any help? >> Paul R. >>=20 >> On 2016-06-12, at 6:45 PM, rita.paul@ns.sympatico.ca wrote: >>=20 >>> Well Paul there is not much to go by. >>> Cann't tell if its over water or not. >>> It could be a swarm of mating Caddis flies with >>> the difference in size been the difference in sexs. >>> Enjoy the spring >>> Paul >>> =20 >>>=20 >>> > On June 12, 2016 at 5:08 PM Paul Ruggles <cpruggles@eastlink.ca> = wrote:=20 >>> >=20 >>> >=20 >>> > Hi all,=20 >>> >=20 >>> > Can anyone tell what is going on with this video of a swarm of = flies I took on my last jaunt in the woods? There appears to be two = species - one larger and fewer, and one smaller and much larger.=20 >>> > The video is in my drop box below.=20 >>> > Paul.=20 >>> >=20 >>> >=20 >>> >=20 >>> >=20 >>> > https://www.dropbox.com/s/oo1m4zrx8huszek/fly%20swarm.mov?dl=3D0 >>=20 >=20 --Apple-Mail-1-39119679 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252 <html><head></head><body style=3D"word-wrap: break-word; = -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; = ">Thanks Steve.<div><br></div><div> I'm not concerned that much = with the identification aspect - I just liked the visual effect of the = motion and the evening sunlight. Hope to use it in one of my = videos.</div><div><br></div><div> Thanks = all.<div><br><div>Paul.</div><div><br><div><div>On 2016-06-13, at 1:41 = AM, Stephen Shaw wrote:</div><br = class=3D"Apple-interchange-newline"><blockquote type=3D"cite"> <meta http-equiv=3D"Content-Type" content=3D"text/html; = charset=3DWindows-1252"> <div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; = -webkit-line-break: after-white-space;"> It doesn=92t look like two species but instead a gradation of just one, = explained by the ones nearest the camera subtending a larger angle at = the lens and so appearing bigger. They are flying so fast that you = can=92t see any detail except that the nearer ones look a bit yellowish. I=92d guess they are a species of fly. <div><br> <div>A number of true flies (Diptera) from quite different phylogenetic = levels typically assemble at the highest local point, known as = =91hilltopping', where the males form swarms and females fly through the = pack to be pursued by males for mating. Well known examples are some bibionids (sometimes called 'March flies=92 in = Britain from their early appearance, when it=92s too cold here) from the = ancient end of the Diptera, and some empidids (=91dance flies=92) from = about half way up.</div> <div>Trees are not useful =97 you=92d need still photos of individual = insects to have any hope of identifying even whether they are dipterans = or something else. Take a net or even a fly swatter next = time?</div> <div>Steve (Hfx)</div> <div> </div> <div> <div> <div>On Jun 12, 2016, at 8:55 PM, Paul Ruggles <<a = href=3D"mailto:cpruggles@eastlink.ca">cpruggles@eastlink.ca</a>> = wrote:</div> <br class=3D"Apple-interchange-newline"> <blockquote type=3D"cite"> <div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; = -webkit-line-break: after-white-space; "> Thanks Paul and Andrew. <div>It was not over water. It was along a paved road at Mason's point = at the top of a hill that overlooked Saint Margarets Bay. Would the = identity of the trees be of any help?</div> <div>Paul R.<br> <div><br> <div> <div>On 2016-06-12, at 6:45 PM, <a = href=3D"mailto:rita.paul@ns.sympatico.ca">rita.paul@ns.sympatico.ca</a> = wrote:</div> <br class=3D"Apple-interchange-newline"> <blockquote type=3D"cite"> <div style=3D""> <div><span style=3D"font-size: 14pt;">Well Paul there is not much to go = by.</span> </div> <div><span style=3D"font-size: 14pt;">Cann't tell if its over water or = not.<br> </span></div> <div><span style=3D"font-size: 14pt;">It could be a swarm of mating = Caddis flies with<br> </span></div> <div><span style=3D"font-size: 14pt;">the difference in size been the = difference in sexs.<br> </span></div> <div><span style=3D"font-size: 14pt;">Enjoy the spring<br> </span></div> <div><span style=3D"font-size: 14pt;">Paul<br> </span></div> <div> </div> <div><br> > On June 12, 2016 at 5:08 PM Paul Ruggles <<a = href=3D"mailto:cpruggles@eastlink.ca">cpruggles@eastlink.ca</a>> = wrote: <br> > <br> > <br> > Hi all, <br> > <br> > Can anyone tell what is going on with this video of a swarm of = flies