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Williamsonia Spring 2006 A publication of the Michigan Odonata Survey Michigan Odonata Survey Volume 10 Issue 1 Williamsonia Spring 2006 INSIDE: Is Swamp Darner resident? New Michigan localities for Ringed Boghaunter Venezuelan odes GLOM 2006 More on the MOS anniver- sary 2006 DSA Meeting Recent literature They’re baaaack! Anax junius by Phil Myers. Outstanding Odonata problems needing our assistance T. (Nick) Donnelly Binghampton, NY [email protected] As we tool up for the forthcoming field season, we should take note of some Michigan problems that would benefit from your help. Red-waisted Whiteface, Leucorrhinia proxima: There is a red (western) and a gray and yellow (eastern) form. The boundary may not be north-south at all (as it appeared on the dot maps), it could be more east-west! I have only two specimens in my collection. One from Alger Co. is clearly the red form. Another (a female, unfortunately) from Lake Co. appears to be the gray-yellow form. I have several males of the gray- yellow form from Sawyer Co., in northwest Wisconsin. The gray-yellow form is more pruinose than the red form. (Continued on page 5) Williamsonia Page 2 Epiaeschna heros — migrant or resident? Mark O’Brien Museum of Zoology, Insect Division University of Michigan, Ann Arbor, MI 48109 he Swamp Darner, Epiaeschna heros, is an unforgettable dragonfly. One of our T largest species, this robust aeshnid seems to be widespread across the southern part of the state of Michigan, yet never commonly found. It appears in the spring months, as migrants fly into Michigan from the south, and those spring records seem So, your to be when sightings and collections are most concentrated. There are a few mid- assignment this season records, but no late summer sightings. This obviously leads me to question year --- pay whether or not we have breeding populations in Michigan, or are all of our records attention to merely of vagrants? Do larvae overwinter here, or is E. heros similar to the migratory Swamp Darners. phenotypes of Anax junius? That is, do early migrants lay eggs and the larvae grow Exuviae would be phenomenally fast and emerge as adults in July or August? Or, do some overwinter here as larvae and emerge the following year? positive proof that E. heros is reproducing Julie Craves and others have caught this darner in mist nets in May when the darners successfully here. appear to be migrating northward. We also have mid-summer sightings – I caught a male flying over small ponds at the E.S. George Reserve in early August of 1996, and I have see others hawking along farm lanes in Washtenaw Co. in mid-summer. There are no exuviae or larvae of this species from Michigan in the UMMZ collection. Yet, I caught a female that was apparently ovipositing in a slough in Warren Woods (Berrien Co.) on June 21, 1999. So, it would appear that they are certainly attempting to reproduce here, but whether or not larvae are surviving to become adults is the question. Summary of E. heros records in MOS Database Huron Co. Jun 25, 1908 Gaige? M Berrien Co. E.K.Warren Preserve, Warren Woods Jun 23, 1919 T.H.Hubbell M Wayne Co. Detroit, 6th floor Federal Building Jul 29, 1938 S. Moore F Livingston E.S.George Reserve Aug 06, 1996 M.F.O’Brien M Co. Berrien Co. Warren Woods Natural Area Jun 21, 1998 M. O’Brien, F Wayne Co. Andover Dr., Dearborn May 10, 2003 D.O’Brien & J. Craves F Jackson Co. Hanover May 10, 2003 D.R. Badgero F Wayne Co. Brownstown Twp., Beech-Daly N of Sibley Jun 19, 2004 Julie Craves & Darrin F O’Brien Wayne Co. Brownstown Twp., King Rd. E of Inkster Jun 19, 2004 Julie Craves & Darrin M Monroe Co. Frenchtown Twp, Munson Park Jul 05, 2004 Julie Craves & Darrin F Wayne Co. Andover Dr., Dearborn Jun 11, 2005 Julie Craves M Ed Note: I have found Swamp Darners ovipositing at Holliday Nature Preserve, Westland, Wayne County, as well. — JAC Williamsonia Page 3 Additional localities for Williamsonia lintneri in Michigan Mark O’Brien Museum of Zoology, Insect Division University of Michigan, Ann Arbor, MI 48109 ast fall, I received a box of specimens from the U.S. Forest Service, from their L Hiawatha National Forest Odonata survey work. Doug Munson was their pri- mary surveyor, and as usual, there were plenty of nice records. Incurvate Emer- ald, Somatochlora incurvata, was one of their targeted sensitive species, and Doug has vastly multiplied the number of records that we have for it. One of the non-target species, Ringed Boghaunter, Williamsonia lintneri, was picked up in several locations in the UP, greatly expanding its range from the first LP locali- ties in Mecosta Co. (Ross and O’Brien, 1999) and Kent Co. (Swanson 2002). In 2003, Allen Chartier photographed this species near Trout Lake in Chippewa Co., and subsequent forays by U.S. Forest Service personnel confirmed his sightings with voucher specimens. In addition, I received a collection of Odonata from Duane Badgero of Plymouth, MI, and among the 425 specimens were two W. lintneri! One of those is a new county record for the Lower Peninsula. On the map, note the cluster of LP counties where W. lintneri has been found. Also note the large area in the UP yet to be searched for the Ringed Boghaunter! We can expect that the number of known localities will greatly increase as more people search in early May to early June. NEW LOCALITIES SUMMARY for W. lintneri Chippewa Co., Hiawatha National Forest, FS Rd. 3136, West Black Creek, T45N, R4W, S31, June 3, 2005, 1 female Chippewa Co., Hiawatha National Forest, Lone Pine Road, FS Rd 3141, 3.5 mi S Trout Lake, May 25, 2003 Chippewa Co., Hiawatha National Forest, T44N, R6W, S10, Bog N of USFS 3344, May 21, 2005, D.R. Badgero, male Delta Co., Hiawatha National Forest,Nahma Marsh, near end of Marsh walk trail, T40N, R19W, S17, June 5, 2003 Montcalm Co. Langston State Game Area, Willard Rd. off 91, C10, Sec. 28, May 7, 2005, D.R. Badgero, f emale LITERATURE CITED: Ross, S. and M.F. O’Brien 1999. Williamsonia lintneri (Odonata: Corduliidae) -- A first Michigan record with additional notes on W. fletcheri. Great Lakes Entomol. 32:201-205. Swanson, G. 2000. Update on Williamsonia in Kent Co. Williamsonia 6(2):6. Venezuelan Odonata Steven Ross Mecosta Co. n late May 2005, I had the opportunity to accompany my Venezuela friend, David Ascanio, to the top of Roraima tepui in I southeastern Venezuela. Roraima tepui (a large mesa) is the largest of the eastern Venezuelan tepuis, rises about 4000 feet above the Gran Sabana and about 9000 feet above sea level. The borders of Venezuela, Guyana and Brazil meet on top. Our in- out trip was a seven day hike through open savannah grassland, pre-montane forest, dwarf-montane forest and the other- worldly top of the tepui itself. While a birding trip for David to do research on the Band-winged Nightjar, I mixed in a little odeing along the way. I had checked into doing some collecting before going and got a good laugh from everyone at the permitting authorities. I did, however, lug along a cheapie net that came in handy to catch and pose a few odes. (Continued on page 4) Williamsonia Page 4 Venezuelan Odonata (cont.) (Continued from page 3) A contact at the university in Merida had suggested looking for Sympetrum roraimai, an endemic, and Rhioaeschna draco, a large black Aeshna. I probably found larvae of both on top of the tepui. The top of Roraima is a world of stunted trees, endemic orchids, pitcher plants, agaves, and Stegolepis (strange endemic plants similar to agaves in appearance), and tens of thousands of permanent and in- termittent pools and dozens of streams. Aeshna larva were common in the permanent pools and stream pools. In only one set of well- hidden pools among the rock outcrops did I find what was probably the Sympetrum larva. On the hike back, adult odes were more prevalent along the Tek River which we had to wade across. We stayed in an adobe hut (with some impressive roaches) for one night. This gave us some Stream near Paraitepui. time to take a much needed bath in the stream and I explored the stream banks. Most of what I found along the Tek were Argids (?) of two or three species and one Hetaerina sp. that was not at all co- operative. The Tek is a clean fast-moving stream over rocks and about 30 feet wide. At the end of the hike, in the village of Paraitepui, I took the oppor- tunity to back track about a kilometer to a small stream about five feet wide. This was a nice secluded area of shrubbery and flat rocks with a bit more than a trickle of water where I found seven species of Odonata. I worked my way up and down the stream from the crossing point of the trail to Roraima, photographing natural and posed odes. Another uncooperative Hetaerina was here also. On re- turning to the small town where we were to camp, I found David in a hurry to leave as our driver had arrived a day early with another couple, so we were able to cut a day off the trip and look for a Harpy Eagle instead. As we had lots of time, we spent two hours near the site, hoping the Stream near Paraitepui. (Editor parent might come in to feed the young.
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