This is a video about hoverflies.
From Natuurmonumenten in the Netherlands:
Natuurmonumenten works for hoverflies, a group of insects with 328 species in the Netherlands. In the Nieuwkoopse Plassen (Zuid-Holland province), for example. …
Recently, species #328 was discovered, the “verborgen sapzwever”. The book ‘De Nederlandse zweefvliegen’ [The Dutch hoverflies] will be published in the summer of 2008 by Naturalis and Stichting EIS-Nederland.
Dear Kitty. Some blog 
* Why are flies so hard to swat? Chalk it up to
good planning:
Fast, high-resolution video imaging is revealing
secrets of the wily insects.
http://www.world-science.net/othernews/080828_flyswat
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