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Black-tipped Darner - Aeshna tuberculifera
State Rank Reason (see State Rank above)
The Black-tipped Darner is currently ranked S2S4 as a "potential species of concern" in Montana because it is potentially at risk of extirpation in the state, due to limited and/or declining numbers, range and/or habitat, even though it may be abundant in some areas.
General Description
The Black-tipped Darner is a relatively uncommonly occurring member of the family Aeshnidae in western Montana, and a potential species of concern. Preferred habitat and breeding sites include clear lakes and ponds often with acid, boggy vegetation in forested regions, as well as some vegetated streams (Dunkle 2000, Paulson 2009). The Black-tipped Darner is distinctive with no face line, and its lateral thoracic stripes broad straight, yellow-white to pale blue, S10 is Black most other mosaic darners with straight thoracic stripes have a pale spot on S10. Associated Wetland ecological systems are: Western Emergent Marsh, Northern Rocky Mountain Wooded Vernal Pool and the Rocky Mountain Subalpine-Montane Fen.
Diagnostic Characteristics
The Black-tipped Darner is distinctive with no face line, and its lateral thoracic stripes broad straight, yellow-white to pale blue, S10 is Black most other mosaic darners with straight thoracic stripes have a pale spot on S10.
Species Range
Montana Range
Range Descriptions
Native
Range Comments
Black-tipped Darners are widespread across northern Canada: Alberta, British Columbia, Manitoba, Newfoundland, North West Territories, Ontario, Quebec, Yukon; and the northern United States: Colorado, New Hampshire, Wyoming south to North Carolina in the east. Black-tipped Darners are usually encountered at higher latitudes or at higher elevations at lower latitudes. They are often the most commonly encountered darner species in the extreme north. In Montana, found in the western Middle Rockies forested region of the state.
Observations in Montana Natural Heritage Program Database
Number of Observations: 39
(Click on the following maps and charts to see full sized version)
Map Help and Descriptions
Relative Density
Recency
(Observations spanning multiple months or years are excluded from time charts)
Habitat
Black-tipped Darner breeding sites include clear lakes and ponds often with acid, boggy vegetation in forested regions, as well as some vegetated streams (Dunkle 2000, Paulson 2009). Away from water, this species forages along forest openings and edges and tends to perch on saplings (Dunkle 2000).
Ecological Systems Associated with this Species
- Details on Creation and Suggested Uses and Limitations
How Associations Were Made
We associated the use and habitat quality (common or occasional) of each of the 82 ecological systems mapped in Montana for
vertebrate animal species that regularly breed, overwinter, or migrate through the state by:
- Using personal observations and reviewing literature that summarize the breeding, overwintering, or migratory habitat requirements of each species (Dobkin 1992, Hart et al. 1998, Hutto and Young 1999, Maxell 2000, Foresman 2012, Adams 2003, and Werner et al. 2004);
- Evaluating structural characteristics and distribution of each ecological system relative to the species' range and habitat requirements;
- Examining the observation records for each species in the state-wide point observation database associated with each ecological system;
- Calculating the percentage of observations associated with each ecological system relative to the percent of Montana covered by each ecological system to get a measure of "observations versus availability of habitat".
Species that breed in Montana were only evaluated for breeding habitat use, species that only overwinter in Montana were only evaluated for overwintering habitat use, and species that only migrate through Montana were only evaluated for migratory habitat use.
In general, species were listed as associated with an ecological system if structural characteristics of used habitat documented in the literature were present in the ecological system or large numbers of point observations were associated with the ecological system.
However, species were not listed as associated with an ecological system if there was no support in the literature for use of structural characteristics in an ecological system,
even if point observations were associated with that system.
Common versus occasional association with an ecological system was assigned based on the degree to which the structural characteristics of an ecological system matched the preferred structural habitat characteristics for each species as represented in scientific literature.
The percentage of observations associated with each ecological system relative to the percent of Montana covered by each ecological system was also used to guide assignment of common versus occasional association.
If you have any questions or comments on species associations with ecological systems, please contact the Montana Natural Heritage Program's Senior Zoologist.
Suggested Uses and Limitations
Species associations with ecological systems should be used to generate potential lists of species that may occupy broader landscapes for the purposes of landscape-level planning.
These potential lists of species should not be used in place of documented occurrences of species (this information can be requested at:
mtnhp.org/requests) or systematic surveys for species and evaluations of habitat at a local site level by trained biologists.
Users of this information should be aware that the land cover data used to generate species associations is based on imagery from the late 1990s and early 2000s and was only intended to be used at broader landscape scales.
Land cover mapping accuracy is particularly problematic when the systems occur as small patches or where the land cover types have been altered over the past decade.
Thus, particular caution should be used when using the associations in assessments of smaller areas (e.g., evaluations of public land survey sections).
Finally, although a species may be associated with a particular ecological system within its known geographic range, portions of that ecological system may occur outside of the species' known geographic range.
Literature Cited
- Adams, R.A. 2003. Bats of the Rocky Mountain West; natural history, ecology, and conservation. Boulder, CO: University Press of Colorado. 289 p.
- Dobkin, D. S. 1992. Neotropical migrant land birds in the Northern Rockies and Great Plains. USDA Forest Service, Northern Region. Publication No. R1-93-34. Missoula, MT.
- Foresman, K.R. 2012. Mammals of Montana. Second edition. Mountain Press Publishing, Missoula, Montana. 429 pp.
- Hart, M.M., W.A. Williams, P.C. Thornton, K.P. McLaughlin, C.M. Tobalske, B.A. Maxell, D.P. Hendricks, C.R. Peterson, and R.L. Redmond. 1998. Montana atlas of terrestrial vertebrates. Montana Cooperative Wildlife Research Unit, University of Montana, Missoula, MT. 1302 p.
- Hutto, R.L. and J.S. Young. 1999. Habitat relationships of landbirds in the Northern Region, USDA Forest Service, Rocky Mountain Research Station RMRS-GTR-32. 72 p.
- Maxell, B.A. 2000. Management of Montana's amphibians: a review of factors that may present a risk to population viability and accounts on the identification, distribution, taxonomy, habitat use, natural history, and the status and conservation of individual species. Report to U.S. Forest Service Region 1. Missoula, MT: Wildlife Biology Program, University of Montana. 161 p.
- Werner, J.K., B.A. Maxell, P. Hendricks, and D. Flath. 2004. Amphibians and reptiles of Montana. Missoula, MT: Mountain Press Publishing Company. 262 p.
- Commonly Associated with these Ecological Systems
Wetland and Riparian Systems
- Occasionally Associated with these Ecological Systems
Forest and Woodland Systems
Grassland Systems
Wetland and Riparian Systems
Food Habits
Larvae feed on a wide variety of aquatic insects, such as mosquito larvae, other aquatic fly larvae, mayfly larvae, and freshwater shrimp. They will also eat very small fish and tadpoles.
Adult- The dragonfly will eat almost any soft-bodied flying insect including mosquitoes, flies, small moths, mayflies, and flying ants or termites.
Ecology
In Montana, males have been collected more rarely than females at oviposition sites (Miller and Gustafson 1996).
Reproductive Characteristics
Male Black-tipped Darners patrol along shorelines above vegetation as well as over open water. Females often mimic male behavior to avoid unwanted harassment prior to oviposition. Oviposition occurs during late afternoon and into evening where female will lay eggs both well above and at waterline into a variety of emergent vegetation including cattails, irises, and bur-reeds. Floating plants in water, dry grass or mud of drying ponds are also likely ovipostion sites (Dunkle 2000, Paulson 2009).
Stewardship Responsibility
References
- Literature Cited AboveLegend:
View Online Publication
Miller, K.B. and D.L. Gustafson. 1996. Distribution records of the Odonata of Montana. Bulletin of American Odonatology 3(4):75-88.
- Additional ReferencesLegend: View Online Publication
Do you know of a citation we're missing?- Dunkle, S.W. 2000. Dragonflies through binoculars: A field guide to dragonflies of North America. New York, NY. Oxford University Press. 266 pp.
- Paulson, D.R. 2009. Dragonflies and Damselflies of the West. Princeton University Press, Princeton. 535 pp.
- Web Search Engines for Articles on "Black-tipped Darner"
- Additional Sources of Information Related to "Insects"
