Biomimetics, Micro-design, Arctium minus et al Hook and Velcro – A PhD and a Virtual Textbook on Biological Attachment Mechanisms and their Mimicking

Home » Biomimetics » Attachment Devices – Dragonfly Head-Arresting Mechanism – detached

Attachment Devices – Dragonfly Head-Arresting Mechanism – detached

Caught in flight as in death, the head of the dragonfly head sags away from its shoulders and the surface protruberances in the chitinous body parts that interface and interlock to hold the head in place (see figure that follows in the next entry).  This specimen was caught using a killing jar and some chloroform. The head sagged as the insect died in flight mode, not settling back into its attached position before falling into permanent sleep.

The True Story is that in order to catch two specimens of the same species, in the two separate positions, attached and detached, took me exactly three weeks and two specimens caught, within ten feet of each other, one caught alive and one found dead on a vine leaf.  No other  specimens were caught or collected and this is the only time I have ever come near catching one, nevermind two at the same time within three weeks of each other in my backgarden.

Detached.

Detached.

Must have been God’s hand.  Lawdy-lawdy!

The chances!

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