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"Most insects are very sensitive to carbon dioxide, and will run or fly away if you breathe directly on them; however, certain beetles will freeze when breathed on -- experiment!"

GO immediately buy a mask face!!!! :D LOL
I knew about this. That?s why I appointed my face at the side always I spotted an insect and just put the eye in viewfinder, of course. :P Many times, I sustain my breathe over 1 min.
Take green dark colors for your clothes to the field as well.

"Be careful! Many insects and spiders can be dangerous, even deadly! If you are unfamiliar with a specific bug, it's better to presume it's got powerful venom, rather than find out the hard way."

take gloves :P LOL But I think it is better to wear pants... and just a T-shirt.

There are more other good tips ;)