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Abstract

Two band-winged dragonlets, Erythrodiplax umbrata (Linnaeus), collected in Wayne County, Michigan on 6 October 2007 represent the first records for this genus and species in the state, as well as the northernmost record for the species.
2007 THE GREAT LAKES ENTOMOLOGIST 95
1Corresponding author (e-mail: jcraves@umd.umich.edu).
2Rouge River Bird Observatory, University of Michigan-Dearborn, Environmental Interpretive
Center, Dearborn, MI 48128.
ERYTHRODIPLAX UMBRATA
(ODONATA: LIBELLULIDAE):
NEW FOR MICHIGAN
Julie A. Craves1, 2 and Darrin S. O’Brien2
ABSTRACT
Two band-winged dragonlets, Erythrodiplax umbrata (Linnaeus), collected
in Wayne County, Michigan on 6 October 2007 represent the rst records for
this genus and species in the state, as well as the northernmost record for the
species. They were found during a period in which many individuals were seen
or photographed in Ohio, which prior to 2006, had only two records.
____________________
Erythrodiplax (Brauer) is a primarily Neotropical genus of 56 species (Gar-
rison et al. 2006), six of which occur regularly in North America north of Mexico
(Dunkle 2000). Erythrodiplax umbrata (Linnaeus), the band-winged dragonlet,
is found in South America south to Argentina, Central America, Mexico, the
Greater Antilles, and the southern United States. Prior to 2006, there were only
four records outside the southern U.S., all represented by specimens. One was
taken at Cedar Bog, Champaign County, Ohio on 11 June 1934 (Borror 1935).
Two teneral individuals were collected in Indiana by B. E. Montgomery on 1
September 1934, a male in Gibson County, and a female in Pike County (Borror
1935). Kansas has two records, a teneral male collected by G. F. Hevel on 11
July 1964 in Labette County and a female taken on 8 June 1999 in Sedgwick
County by R. J. Beckemeyer (Beckemeyer 2004).
On 11 August 2006, a male E. umbrata was photographed at Armleder
Park, Cincinnati, Hamilton County, Ohio, which remained present until at least
23 August (Abbott 2007, Hull 2007). In 2007, Ohio had a spate of records for
this species. One was photographed on 29 August at Headlands Dunes State
Nature Preserve, Lake County and two more were seen at this location on
10 September (Rosche 2007). Two adult males were found and photographed
on 4 September at Frohring Meadows, Geauga County and another was pho-
tographed there on 18 September (Rosche 2007). An adult male was found
on 14 September at the Leroy Wetlands, Lake County. Multiple individuals,
including juveniles, were observed at this site through 22 October; the peak
number was at least 20 juveniles on 26 September (Rosche 2007, J. Pogacnik,
pers. comm.). A male was photographed at Cuyahoga Valley National Park,
Cuyahoga County on 8 October and two teneral individuals on 17 October
(Gardella 2007a, L. Gardella, pers. comm., contra Rosche 2007). None of these
individuals were collected.
Bearing the recent Ohio ndings in mind, on 6 October we took advantage
of unseasonably warm (30°C) and sunny weather to do a nal survey of adult
odonates at the Detroit River International Wildlife Refuge, Humbug Marsh
Unit, located along the lower Detroit River, in Wayne County, Michigan. Part
of this unit is an 18 ha browneld owned by Wayne County. The only surface
water on the browneld site were rainwater puddles unintentionally created by
construction equipment earlier in the summer. These puddles were restricted
to a 3 ha section approximately 300 m from the Detroit River.
Immediately upon entering the site, JAC spotted a male E. umbrata at an
8 × 4 m puddle (42.115, -83.191). As we attempted to photograph it, a second
96 THE GREAT LAKES ENTOMOLOGIST Vol. 40, Nos. 1 & 2
male ew in and the two chased each other. For about 15 min, they alternated
between the original puddle and another of similar size approximately 20 m
away. Although they were wary and difcult to approach, JAC was eventually
able to capture both. Voucher specimens have been deposited into the Univ.
Michigan Museum of Zoology, Insect Division, and have been cataloged by the
Michigan Odonata Survey.
This location is roughly 40 km farther north than the northernmost record
for Ohio (at Headlands Dunes State Nature Preserve) and over 220 km farther
north than the previous northernmost specimen, the one taken by Borror in
1934 outside of Columbus (Borror 1935).
DISCUSSION
Erythrodiplax umbrata inhabits marshy ponds, pools, and lakes, often
temporary water (Dunkle 2000, Abbott 2005, Garrison et al. 2006). The Michi-
gan dragonlets were in < 3-month-old depressions created by earth-moving
equipment. All the 2007 Ohio records were found in similar pools and puddles
of recent vintage. The Frohring Meadows park was under construction and the
dragonlets there, as well as the one at Headland Dunes, were found in “simple
scrapes” (L. Rosche, pers. comm.). Leroy Wetlands is a newly created wetland
complex and the site containing the dragonlets had held water for < 2 months
(Pogacnik 2007). The Cuyahoga Valley National Park site is a mitigated wet-
land and the dragonlet was in what was described by the observer as a “mud
puddle” (Gardella 2007b).
These northern records of E. umbrata constitute a substantial northern
range expansion for this species. Hickling et al. (2005) documented a north-
ward shift in the range margins in 34 of 37 species of non-migratory British
Odonata between 1960-1970 and 1985-1995. Catling (1996) reported that the
range of Enallagma civile (Hagen), (Odonata: Libellulidae), had moved north
by at least 200 km in southern Ontario between 1959 and 1996. Authors of
both these papers noted that these range shifts could be associated with global
climate change. More short-term climatic events might also help explain the
recent northward movements of E. umbrata. For much of 2006, Texas and
Oklahoma, core areas of the range of E. umbrata in the U.S., experienced severe
to extreme drought (NWSCPC 2008) with 2007 the driest year in the 112-year
record in the southeastern U.S. (NCDC 2008a). The drought was coupled
with above-average temperatures in 2006-2007 over the south and southeast
(NCDC 2008b). These conditions may have pushed E. umbrata north in search
of breeding sites as the shallow ponds and puddles dried up over much of their
range or above-average temperatures created unsuitable thermal conditions in
surviving aquatic environments.
The presence of teneral E. umbrata in northeast Ohio suggests they were
able to breed in the temporary ponds near which they were found. The two
Michigan males on 6 October were fully pruinose adults. No E. umbrata were
present at the Michigan site in over a dozen previous weekly visits or one sub-
sequent visit and no nymphs were found during larval sampling in the puddles
on 13 October. These puddles will be checked again in 2008, although they are
likely to be destroyed early in the spring season.
ACKNOWLEDGMENTS
Funding was provided by a USFWS Midwest Region Challenge Cost Share
Grant to the University of Michigan-Dearborn from the Detroit River International
Wildlife Refuge. Many thanks to Refuge manager John Hartig and assistant
Refuge manager Steve Dushane for their interest and facilitation of this work
and execution of this grant. Also thanks to those who provided details on the
2007 THE GREAT LAKES ENTOMOLOGIST 97
recent Ohio records: Lou Gardella, Bob Glotzhober, John Pogacnik, and Larry
Rosche. Additional photographers that documented the Ohio records include
William Hull, Sally Isacco, Linda Gilbert, and Judy Semroc.
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onViews. Newsletter of the Cleveland Museum of Natural History Conservation
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... Because their habitats tend to be less ecologically stable or persistent, lentic species have a higher capacity for dispersal and are more prone to move long distances, especially due to climate-related events such as drought (Arribas et al. 2012, Hof et al. 2012, Grewe et al. 2013). This may explain the occurrence of several southern lentic dragonfly species in northern states in the past decade (Craves and O&apos;Brien 2007, Mauffray 2008, Craves and O'Brien 2011). ...
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