81. Alana Ecology Dragonflies And Damselflies Title FSC Guide to dragonflies and damselflies of Britain Author Steve Brooks and Richard Askew Format Foldout chart Size 175 x 245 mm Pages 12 http://www.alanaecology.com/acatalog/Dragonflies_and_Damselflies.html

Search Tips Advanced Search Home About Us ... Account Login STORE GUIDE document.write(YahooSections(section_tree)) CARDS ACCEPTED Dragonflies and Damselflies You are in Bookshop Field Identification Charts Insects Dragonflies and Damselflies FSC Guide to Dragonflies and Damselflies of Britain ISBN: Title: FSC Guide to Dragonflies and Damselflies of Britain Author: Steve Brooks and Richard Askew Format: Fold-out chart Size: 175 x 245 mm Pages: Date: Publisher: Field Studies Council A20016 FSC Guide to Dragonflies and Damselflies of Britain Quantity BACK Home Site Map Delivery ... Site Security YOUR CART CART/CHECKOUT FURTHER INFO Technical support Order free catalogue

82. Webmaster's Gallery - Dragonflies And Damselflies dragonflies and damselflies. dragonflies damselflies. ~ click on any image for an enlargement ~. dragonflies and damselflies dragonflies and http://www.toledo-bend.us/index.shtml?dragonflies

83. Dragonflies And Damselflies dragonflies and damselflies. (This column was first published in the July 29, Like most of us, I knew how to identify dragonflies and damselflies. http://www.acsu.buffalo.edu/~insrisg/nature/nw02/0729dragonflies.htm

Dragonflies and Damselflies (This column was first published in the July 29, 2002 Buffalo News Early in July I spent a delightful day with three naturalist friends, Bob Andrle, David Cooper and Jim Landau. For years I have known these men as fine bird watchers but on this day they brought their talents to bear on a quite different field of natural history. They took me along on their expedition looking for dragonflies and damselflies, members of the order Odonata. The day was nearly but not quite perfect for our exploration. The sky was almost cloudless and the temperature made it only to the high 70s. The one drawback was what you and I would consider a breeze; to these insects, however, it was probably nearer a gale. Indeed, those we found were patrolling sheltered areas. Like most of us, I knew how to identify dragonflies and damselflies. They're large insects with two pairs of membranous wings and long straw-thin bodies. Although there are many differences between the sub-orders, two of those characteristics make it easy to tell them apart. First, when perched, dragonflies hold their wings out flat like those of an airplane; damselflies hold theirs pressed together over their backs. And second, damselflies are much weaker fliers; they are like rubber-band-driven model planes compared to jet-powered dragonflies. One of the many common names for dragonflies is mosquito hawks, an accurate designation as all odonates are effective insect predators. Their big eyes give them almost 360° vision and their dangling legs form a basket in which they scoop up their prey. May Berenbaum calls this "the ultimate shopping cart." They take large insects as well. One big dragonfly spoiled our lunch one day in the Minnesota Boundary Waters. While we were eating, it joined us to make its own meal of a smaller dragonfly it had caught.

84. Dragonflies And Damselflies Difference between a Dragonfly and a Damselfly A Dragonfly is generally larger, its flight is less jerky than a damselfly. When resting the dragonfly http://www.haworth-village.org.uk/nature/pictures/dragonflies.asp

Home Contributors Contact Search ... Tourist Information Nature Menu Amphibians Birds Butterflies Dragonflies ... Nature Wallpaper Nature Books in association with Amazon.co.uk Wildlife Birds Butterflies Wild Flowers ... BBC Springwatch Nature Photography All the photographs on this website were taken with the wildlife in its natural habitat. The photos were taken either in gardens or on public paths/right of way in West Yorkshire. Dragonflies and Damselflies Difference between a Dragonfly and a Damselfly: A Dragonfly is generally larger, its flight is less jerky than a damselfly. When resting the dragonfly usually has its wings 90 degree to its body, the damselfly usually has them folded back along its body. Both species use their long legs to capture insects when flying, their legs are so long that they are unable to walk on the horizontal. Dragonflies feed on insects which they catch while flying with their forelegs extended out. They belong to the group Hawkers - Dragonflies that restlessly patrol their territory in search of prey. Other category is the Darters which have thicker body and will spend time resting on vegetation.

85. Dragonflies And Damselflies, Their Life Cycle And Habits dragonflies and damselflies, their life cycle and habits. http://www.ajmorris.com/science/notes/dragonfly.htm

Dragonflies and Damselflies their life cycle and habits Dragonflies and damselflies are both insects in the order Odonata and are collectively called 'dragonflies' although only those of the sub-order Anisoptera are 'true' dragonflies, while those of the sub-order Zygoptera are the damselflies. Odonata means 'tooth jaw' and refer to the serrated mouthparts of these insects. Anisoptera means 'unequal-winged' and refers to the fact that true dragonflies have two pairs of wings, the back ones being shorter and broader than the front. They are strong fliers and may be seen at long distances from water. At rest, they usually hold their wings straight out from their bodies. The eyes are very large, and usually touch each other at the center. Zygoptera means 'yoke-winged' and refers to the fact that damselflies, which also have four wings, usually have all four wings the same shape and size. They fly only weakly, so they are usually seen near water. When at rest, they hold their wings folded back along their bodies. There are stories that dragonflies only live for one day, but that is not true most likely people are confusing stories about mayflies (which may only live a few days in their adult stage, though they live much longer as larvae). Mayflies are not closely related to dragonflies and damselflies, they have only two wings. For some dragonflies, the full life cycle from egg to adult may last as long as 6 or 7 years, though they only live a few months as adults.

86. Ohio Odonata Survey dragonflies and damselflies of Northeast Ohio by Larry Rosche is a localized guide; The dragonflies and damselflies of Ohio edited by Bob Glotzhober and http://mcnet.marietta.edu/~odonata/book/books.html

Books on Ohio's Odonata Odonate enthusiasts in Ohio are lucky to have 2 books published in 2002. Dragonflies and Damselflies of Northeast Ohio by Larry Rosche is a localized guide; The Dragonflies and Damselflies of Ohio edited by Bob Glotzhober and Dave McShaffrey (and written by a total of 11 authors) is a comprehensive guide to all of the species in the State. The Dragonflies and Damselflies of Ohio is outlined below; click on the link above for the Dragonflies and Damselflies of Northeast Ohio Commentary by Dave McShaffrey The Dragonflies and Damselflies of Ohio began with the Ohio Odonata Survey in 1990. In addition to looking at published records and museum specimens, the more than 212 volunteers helped to collect over 25,000 specimens. All of the specimen records and historical data were entered into a database on which the distribution and seasonal activity data are based. The book includes generic keys to the larvae and specific keys to the adult males and females for all 162 species known from Ohio (as well as a few species likely to occur here).

87. Dragonflies dragonflies and damselflies can be held by their strong wings; folding the wings above dragonflies are heavybodied and usually larger than damselflies; http://www.desertusa.com/mag98/nov/papr/drangonflies.html

Dragonflies Text and all scans by Kathy Biggs They come not only in red, fuchsia, orange, pink, blue, gold, saffron, black, emerald, maroon, earth tones, and more, but also in metallic colors. Some have colored, spotted or banded wings; others may have clear wings but clubbed abdomens or a spike on their tail. And, no, they do not sting or bite. They have mouths that they do use to bite their prey (mostly mosquitoes and gnats) but they do not bite people unless caught and handled roughly, and even then it's akin to getting a good pinch. They have no stingers: the projections on the end of their abdomens are their claspers, used by the male to hold the female in their unique 'wheel' mating position. All you really need in order to be a dragonfly watcher are you eyes. To date, more than 117 species of dragonflies have been identified in the greater Southwest - over 184 if you include the damselflies, the members of the smaller suborder Zygoptera. Our desert habitats have a unique and beautiful dragonfly fauna, often containing species found in no other environment. Desert specialists include the Desert Whitetail, Desert Forktail, Desert Firetail, Mexican Amberwing, Mexican Forktail, Filigree Skimmer, Serpent Ringtail, Brimstone Clubtail, Kiowa and Pima Dancers, Painted Damsel and the very rare Desert Shadow Damsel. Dragonfly studies in the United States are in their infancy, as the study of birds was a century ago. Believe it or not, just a few years ago a much smaller number of

88. O. Orkin Insect Zoo: Student Resources Component--Odonata There are about 5000 species of dragonflies and damselflies worldwide. dragonflies and damselflies range from the arctic to the tropics and are even http://insectzoo.msstate.edu/Students/odonata.html

Class Hexapoda Order: Odonata Common Name Dragonflies and Damselflies Names The order Odonata is pronounced in the English form "o do NAY ta". This scientific name is derived from a Greek word, odon , meaning " tooth," possibly referring to the teeth on the mandibles or tusk-like shape of the insect's abdomen. Other common names for dragonflies include sewing needles, devil's darning needles, snake doctors, horse stingers, and mosquito hawks. The nymphs sometimes are referred to as water lizards. The common names of "sewing needles" and "devil's darning needles" are based on an old fable that these insects could sew up one's ears. The term "snake doctor" comes from a belief that dragonflies warn snakes of approaching danger. Diversity There are about 5,000 species of dragonflies and damselflies worldwide. It is estimated that there are 500 to 1500 species yet to be described and named in the world. In the United States and Canada, there are more than 410 species. Habitats Dragonflies and damselflies range from the arctic to the tropics and are even found in desert regions where water is present. Immature dragonflies and damselflies, called naiads, live in water and often have preferences for a specific kind of aquatic habitat, some preferring streams and others ponds or lakes. Some tropical species live in pitcher plants, or bromeliads, that gather rain water in which the naiads live. A few species have naiads that can live on the ground under damp leaves.

89. Dragonflies & Damselflies Photo Gallery By Lejun At Pbase.com Fragile Forktail, Citrine Forktail Citrine Forktail, Unidentified Damselfly Unidentified Damselfly. Unidentified Dragonfly Unidentified Dragonfly http://www.pbase.com/lejun/dragonflies__damselflies

profile all galleries Flies, Bees, Wasps, Spiders and Mantids tree view Meadowhawk Fragile Forktail Meadowhawk Blue Dasher Blue Dasher Blue Dasher Blue Dasher Blue Dasher Blue Dasher Green Clearwing Familiar Bluet Familiar Bluet Familiar Bluet Lilypad Forktail Familiar Bluet Bluet Black-faced Skimmer Widow Widow Widow Widow Widow Black-winged Damselfly Black-winged Damselfly Black-winged Damselfly Black-winged Damselfly Black-winged Damselfly Blue Dasher Common Whitetail Blue Dasher Blue Dasher Blue Dasher Blue Dasher Blue Dasher Blue Dasher Blue Dasher Blue Dasher Blue Dasher Blue Dasher Blue Dasher Eastern Pondhawk Eastern Pondhawk Eastern Pondhawk Four-spot Skimmer Common Whitetail Common Whitetail Common Whitetail Common Whitetail Common Whitetail Common Whitetail Common White Tail Black-faced Skimmer Widow Widow Green Clearwing Green Clearwing Green Clearwing Brown-spotted Yellow-wing Slaty Skimmer Golden-winged Skimmer (Female) Black-winged Damselfly Black-winged Damselfly Black-winged Damselfly Fragile Forktail Fragile Forktail Fragile Forktail Fragile Forktail Fragile Forktail Violet Tail Fragile Forktail Citrine Forktail Unidentified Damselfly Unidentified Dragonfly dflyblueprobably the very best.jpg

90. Dragonflies & Damselflies Photo Gallery By 455 Rocket At Pbase.com 455 rocket profile all galleries dragonflies damselflies Damselfly 1.jpg, dragonfly 1.jpg dragonfly 1.jpg, dragonfly 2.jpg dragonfly 2.jpg http://www.pbase.com/455rocket/dragonflies_and_damselflies

profile all galleries Nature tree view Damselfly 2.jpg Dscn2384.jpg Dscn2388.jpg Dscn2515.jpg Dscn2516.jpg Dscn2519.jpg Dscn2523.jpg dragonfly 3.jpg does this towel go with my exoskeleton.jpg Damselfly 1.jpg dragonfly 1.jpg dragonfly 2.jpg dragonfly 4.jpg airbourne.jpg dragonfly face.jpg Lake8thAug 11b.jpg post a comment click on thumbnails for full image

91. Ray Bruun Photography - Dragonflies & Damselflies Dragonfly Damselfly Photography Pages Broadwinged damselflies (Calopterygidae). River Jewelwing (Calopteryx acquabilis) American Rubyspot http://bruunphotography.com/odes.html

Photography Pages Most of these photographs were taken with a Canon EOS 10D digital SLR, Canon EF 180mm macro lens, and Canon 550EX flash. [Click on any species name to see a photo(s) of that species.] DAMSELFLIES (Zygoptera) Broad-winged Damselflies (Calopterygidae) River Jewelwing (Calopteryx acquabilis) American Rubyspot (Hetaerina americana) Spreadwings (Lestidae) California Spreadwing (Archilestes californica) Spotted Spreadwing (Lestes congener) ... (Lestes unguiculatus) Pond Damsels (Coenagrionidae) California Dancer (Argia agrioides) Emma's Dancer (Argia emma) ... (Amphiagrion abbreviatum) TYPICAL DRAGONFLIES (Anisoptera) Darners (Aeshnidae) Common Green Darner (Anax junius) California Darner (Rhionaeschna californica) ... (Aeshna walkeri) Clubtails (Gomphidae) Grappletail (Octogomphus specularis) Pacific Clubtail (Gomphus kurilis) ... (Ophiogomphus morrisoni) Cruisers, Emeralds and Baskettails, and Skimmers (Libellulidae) Emeralds and Baskettails (Corduliinae) American Emerald (Cordulia shurtleffii) Skimmers (Libellulinae) Crimson-ringed Whiteface (Leucorrhinia glacialis) Hudsonian Whiteface (Leucorrhinia hudsonica) ... (Libellula saturata) Odonata Locations in Far Northern California This is a project begun in 2005. My intent is to explore as many different odonata habitat as possible in the interior of far Northern California over a several year period. Every suitable location will result in a web page, or pages, containing a description, location map, habitat photographs, species lists, and photographs of odonata. A link to the first location, a pond in Mouth-of-Cottonwood Creek Wildlife Area, is given below. The web page for this site is not yet finished as it does not contain all of the elements described above. The following map gives an idea as to the scope of this project by showing potential locations (red diamonds are streams, yellow diamonds are marshes and lakes).

92. Dragonflies And Damselflies Zygontera damselflies. dragonflies. The dragonfly is a member of the order Odanata damselflies are slender, delicate and less robust than dragonflies. http://www.enhg.org/b/b12/12_12.htm

Dragonflies and Damselflies Dragonflies and Damselflies by Diane Donohue Order Odanata Anisontera : Dragonflies Zygontera : Damselflies Dragonflies The dragonfly is a member of the order Odanata (meaning toothed). As there is no pupal stage, development of Odanata is known as incomplete metamorphosis. Odanata have existed since the Carboniferous Age, about 300 million years ago and at that time species of enormous size existed such as Meganeura, which had a wingspan of 65 cm (over 25 inches). Dragonflies are recognized by their elongated bodies (although there are species with short bodies), protuberant eyes and two pairs of well-developed wings. The eyes are the main organs of sense as the antennae, normally the main area of the senses of touch and smell, are poorly developed. The eyes of true dragonflies usually meet, or almost meet, at the top of the head. They are mainly day-flying insects and rely entirely on their sight. They can perceive shapes up to 5 - 6 m (16 - 19 feet) away and movement up to 15 - 20 m (50 - 60 feet). Dragonflies are generally bright colored and species may be recognized by color alone. However, females differ in color or pattern from males; the insects change color as they mature and young specimens are generally paler than older ones so that color alone should not be taken as positive identification. The colors do fade after death unless specific techniques in preservation are followed; even then, the color may change so identification must be made while the specimen is still alive and certainly before treating and setting.

93. Wild About Britain - Wild About Britain's - Wild Gallery - Dragonflies & Damself Go Back, Wild About Britain s Wild Gallery Reload this Page dragonflies damselflies Gallery Images in Category dragonflies damselflies Gallery http://www.wildaboutbritain.co.uk/gallery/browseimages.php?c=24

94. Dragonflies And Damselflies Of California dragonflies and damselflies of California Black Meadowhawk, and Sedge Sprite are just a few of the dragonflies and damselflies identified in this http://www.ucpress.edu/books/pages/9442.html

@import "style.css"; 295 pages, 4-1/2 x 7-1/4 inches, 41 color illustrations, 13 line illustrations, 108 range maps Published May 2003 Available worldwide Entire Site Books Journals E-Editions The Press Timothy D. Manolis Dragonflies and Damselflies of California California Natural History Guides, 72 In stockships in 2-3 days In stockships in 2-3 days Categories: Natural History Entomology Ecology, Evolution, Environment Natural History ... MORE INFO AND CHOICES Email: Read the introduction, pdf format View sample pages, pdf format Description About the Author "This handy guide just about fits in a jacket pocket, and appears to have waterproof flexible covers. . . . The text is succinct and illustrated nicely with line drawings. . . . I found it easy to read and more than comprehensive enough for a field guide. . . . Not only is this book essential for any odonatist visiting California, but also worth while anywhere for pure enjoyment! It is number 72 in a series of books called the 'California Natural History Guides', and if the other 71 are anywhere near as good, then I calculate that an all-round naturalist will need to take 18 jackets on his next visit."Nev Yates, Austrolestes "This book should be very popular. . . . My daughter and I used this book with great success last year in the field."Larry G. Bezark

95. Odonata (dragonflies & Damselflies) Profiles of miscellaneous Odonata (dragonflies damselflies) http://www.backyardnature.net/odonata.htm

Miscellaneous Portraits of the order Odonata wings: 4, HW large as FW mouth: chewing tarsi segments: metamorphosis: simple, nymphs aquatic NOTE: Among dragonflies and damselflies, wing venation is very important to notice during the identification process. The above picture shows some of the venation highlights on a typical hindwing . On this species, the inner margin is curved and not notched; the anal loop is foot-shaped; the triangle has a vein across it; the brace vein is not particularly conspicuous, and; the stigma is large and merges with a pigmented area at the wing's tip. Notice how these features vary on your own discoveries! English Name: Yellow-sided Skimmer Family: Libellulidae (common skimmers) Genus: Libellula Species: flavida If you live near a body of water where dragonflies congregate and you have some binoculars, you can have oodles of fun by getting the book called Dragonflies Through Binoculars : A Field Guide to Dragonflies of North America , and listing all the dragonflies in your area. You'll be amazed by how many species you can spot, how different from one another they are, and what fascinating habits they have! To give you an idea of what dragonfly identification is like, the two inset images shown above with the skimmer are close-ups showing features that help determine which species we have. Those orangish things at the lower left are the skimmer's compound eyes. Notice how they join together at their bases. If this had been a grayback or clubtail dragonfly, the eyes wouldn't have joined. At the lower right you see a close-up of the veins at the very top, right of the dragonfly's top, right wing. Here the important thing to see is that there is

96. Dragonflies And Damselfies In Kansas Photo by Jim Mason, dragonflies and damselflies are insects in the Order ODONATA. They are some of the more noticeable insects, especially around the bodies http://www.gpnc.org/odonata.htm

Widow Skimmer (male) Photo by Jim Mason Dragonflies and damselflies are insects in the Order ODONATA . They are some of the more noticeable insects, especially around the bodies of water that they call home. Their amazing aerial capabilities and superb sense of sight make them fascinating creatures to watch. As with birds, learning to tell the different species apart would seem to be an obvious first step into their world. But an easier step is to observe their different behaviors instead! A small pond may have 6 or more different species active at one time. The observant naturalist will notice that: A lot of their activity has to do with breeding. Being insects, this is no surprise, but their high visibility means this is all out in the open where it can be easily seen. Males joust with other males for territory and chase females. (Males confident of their status may just raise their tail in the air while perched to fend off rivals.) Mated pairs of some species fly around in tandem. The male flies in front, holding the female by the nape of her "neck" with special claspers on the end of his abdomen as the female lays her eggs. Males of some other species will guard the airspace around a female they have mated in an attempt to prevent other males from mating with her.

97. Dragonflies There are nearly 5000 species of dragonflies and damselflies found in the temperate and tropical regions of the world. They have been classified Odonata by http://www.twingroves.district96.k12.il.us/Wetlands/Dragonfiles/DragonFlies.html

Preserve Gate Map Site Search Bog ... Interview with Expert Introduction There are nearly 5000 species of dragonflies and damselflies found in the temperate and tropical regions of the world. They have been classified Odonata by the Latin-minded scientific community. Odonata, like dentures, dentists, and orthodontists, refers to the tooth like ridges on their mandible mouth parts and it works for the nymphs too. Chewing is a big part of the dragonfly life. Differences between Dragonflies and Damselflies Dragonflies (Anisoptera) Damselflies (Zygoptera) Generally strong fliers A weak, fluttery flight Eyes (apart from Gomfidae and two others ) touch on the top of the head Eyes are well separated At rest, the wings are held away from the body at approximately 180 degrees. At rest, the wings (apart from Lestidae and one or two others) are held close to the body. Species of Zygeroptera common in the United States include the ruby-spot Haterina americana

98. Dragonflies And Damselflies The European odonates (dragonflies and damselflies) Pictures, checklist, information, links, literature list and much more on odes; Odonatology Homepage http://www.reference.com/Dir/Science/Biology/Zoology/Arthropoda/Insects/Dragonfl

Dictionary Thesaurus Encyclopedia Web Home Premium: Sign up Login YOUR AD HERE Dictionary ... Encyclopedia - Web Directory Web Directory Top Science Biology Zoology ... Insects / Dragonflies and Damselflies Vivid Dancer This is an article by the Royal BC Museum about Argia Vivida, an endangered species of damselfly. Dragonfly (Odonata) Biodiversity Photographs, mating behavior, species lists, information about collecting and preserving dragonflies, a glossary of terms, range maps of western US dragonflies and much more from this impressive site published by the University of Puget Sound. All About Dragonflies Dragonfly FAQs from the University of Tennessee. Swedish Dragonflies Dragonfly FAQs, dragonfly anatomy, a key to Swedish dragonflies and damselflies, how to catch and raise dragonflies, photographs, photography tips, dragonfly sex and much more from Martin Peterson's dragonfly website. Dragonfly - Order Odonata An article about dragonflies by Judi Manning, summarizing their history, life cycle and biology. Odonata Families A concise summary of characteristics of Odonata and their suborders and families. The European odonates (dragonflies and damselflies) Pictures, checklist, information, links, literature list and much more on odes

99. Los Angeles County - Ken Malloy Harbor Regional Park - KMHRP - Odes - Dragonflie dragonflies damselflies. Blueeyed Darner Blue-eyed Darner which is dragonflies and damselflies) at the site only began in 2002, so, the http://www.utopianature.com/kmhrp/odes.html

Blue-eyed Darner Blue Dasher A PRELIMINARY LIST OF KMHRP ODONATA Ken Malloy Harbor Regional Park, in the city of Los Angeles contains the largest natural (original) lake in the entire city. It has been preserved to the degree that it is the "last stand" for extensive freshwater marsh and riparian habitat, in a reasonably natural state, in the L.A. basin. While undoubtedly some species of ODES have disappeared from the site due to pollution and habitat alteration, it appears to still have resonably good ODE diversity to this day. The following species are those known from KMHRP. The real exploration of the "ODES" (short for the order Odonata, which is Dragonflies and Damselflies) at the site only began in 2002, so, the list is preliminary at best. But, it is a start at least. Hopefully someone will pick up the ball and run! There is next to nothing known about things like what are local flight periods, etc. of the particular species. Variegated Meadowhawk Here's the list, revised July 27, '03 Class - Insecta Order - Odonata - Dragonflies and Damselflies DRAGONFLIES - suborder Anisoptera 1) Green Darner - Anax junius - common 3) Blue-eyed Darner - Aeshna multicolor - common 4) Variegated Meadowhawk - Sympetrum corruptum - common 5) Western Pondhawk - Erythemis collocata - sighting 5/03 6) Blue Dasher - Pachydiplax longipennis - common 7) Mexican Amberwing - Perithemis intensa - old sight record 8) Flame Skimmer - Libellula saturata - common

100. DRAGONFLIES AND DAMSELFLIES: INTRODUCTION dragonflies AND damselflies. PM Catling, R. Hutchinson and B. Ménard Biological Resources Program Eastern Cereal and Oilseed Research Centre http://www.naturewatch.ca/Mixedwood/odonata/intro.html

From: ASSESSMENT OF SPECIES DIVERSITY IN THE MIXEDWOOD PLAINS ECOZONE DRAGONFLIES AND DAMSELFLIES Biological Resources Program Eastern Cereal and Oilseed Research Centre Agriculture and Agri-Food Canada Ottawa, ON Twenty-five years ago, a world expert on dragonflies (who also served as a Director of Research for Agriculture Canada and Chairman of Biology at University of Waterloo), noted that the growing human pressure of agricultural, industrial and urban growth in the Mixedwood Plains ecozone offered "as a prospect in the years to come a significant diminution of the Canadian dragonfly fauna". At the same time he offered the hopeful comment: "When this growth stops - as eventually it must - it is to be hoped that the remaining freshwater habitats will still sustain a diverse and vigorous dragonfly fauna - a reliable, and delightful, indicator of a healthy environment" (Philip S. Corbet in Walker & Corbet 1973, p. ix). . What has happened over the past 25 years? The following assessment is intended to answer this question. Instead of being an exhaustive review, this is intended to provide an overview and a brief introduction to various aspects of biodiversity based especially on recently published work and referring specifically to the Mixedwood Plains Ecozone of Canada and adjacent areas. Literature and other sources of information are provided to enable the user to go much further. In the cited literature we have favoured recent references that are less available and we have avoided excess by alluding to other extensive sources of literature citations.

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