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Images in Ultraviolet (UV) Light
Dragonflies & Damselflies Page 3
Ref: broad-bodied chaser dragonfly male in uv.jpg
This is the only commonly known member of the Odonata (Dragonfly &
Damselfly) family with substantial UV reflectance on the top
surface. It is a blue 'powder' that rubs off during life, so
old individuals often have less normal light blue and similar
UV.
The main section shows the female with none and
another male before and after brushing a segment
to show the effect.
We have also surveyed the Black-tailed Skimmer which shows
a similar characteristic.
Ref: broad-bodied chaser dragonfly male 2 in uv.jpg
To demonstrate that the UV reflectance and blue 'powder' are
the same material one half segment has been progressively
brushed between sets of images.
Ref: brown hawker (aeshna grandis) female 2 in uv.jpg
 female 2 in uv.jpg)
Ref: brown hawker dragonfly (aeshna grandis) female in uv.jpg
 female in uv.jpg)
Ref: brown hawker dragonfly (aeshna grandis) in uv.jpg
 in uv.jpg)
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