| Spiketails (Cordulegastridae) |
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Brown Spiketail (Cordulegaster bilineata)
11 records above Fall Line. Pale green eyes. Most similar to Twin-spotted,
but smaller. Paired triangles on abdomen are all close to same size, on
Twin-spotted they vary in size. Males on left, females on right, short
ovipositor.
11 Mar- 8 Jul |
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Tiger Spiketail (Cordulegaster erronea)
Large insect, 70 mm. 11 records all in northern part of GA. Unbroken
rings on abdomen, only Say's Spiketail of south GA has this pattern but
smaller and well separated by range..
8 Jun- 4 Sep |
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Twin-spotted Spiketail (Cordulegaster maculata)
Widespread early in the year, by far the most common spiketail. Note abdomen
markings are only on upper surface, appear as a series of paired triangles.
Triangles variable in size between individuals and on same individual.
Resembles Brown Spiketail but larger and Brown has all triangles same size.
Male and female together for comparison at lower left, posed. Lower right is
female ovipositing, up-and-down motion like a sewing machine.
11 Mar- 27 Jun |
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Arrowhead Spiketail (Cordulegaster obliqua fasciata)
9 records spread across the state. Southern form found in most of GA is
slightly larger with pale blue eyes (right), and northern form found in
north GA is slightly smaller with green eyes (left).
17 Apr- 17 Aug |
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Say's Spiketail (Cordulegaster sayi)
Found only in north FL and eastern GA, and only for a short time in Mar and
Apr., 10 counties in GA. Note abdominal markings go all the way around to form
rings, though they can be broken on top. Only much larger Tiger of north GA
also has rings, well separated by range. Note magenta middle thoracic
stripe, no other spiketail has this. Markings go from pale yellow, almost
white when fresh to eventually bright yellow in older individuals.
8 Mar-22 Apr |