Dragonfly 5, Rhionaeschna multicolor, thoracic spiracle

Joined
Jun 27, 2009
Messages
78
Location
Oregon
Insects breathe through spiracles that connect with tracheae which are tubes that carry oxygen to all the cells in the body and carry away CO2. Dragonflies have a main spiracle on each side of the thorax and hidden ones on the undersides of the first 8 abdominal segments. Watching a dragonfly in the field you can see its abdomen expand and contract as they breathe. The hairs help keep fine particles like pollen, spores, and dust out. The spiracles can be closed to seal the respiratory system. The tracheal system is part of the exoskeleton and is shed whenever the nymphs or larvae molt.

This is not a particularly photogenic subject but I think it is interesting.
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Nikon d810, Mitutoyo M Plan Apo 20x infinity microscope objective mounted on a 200mm Micro-Nikkor, [email protected]/60, ISO64, 160 shots focus stacked using a StackShot, processed with Zerene Stacker and Photoshop.
 

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