name 4 types of insects that live in ponds and what they feed on.
Since this is not my area of expertise, I searched Google under the key words "pond insects" to get these possible sources:
http://www.microscopy-uk.org.uk/index.html?http://www.microscopy-uk.org.uk/pond/insects.html
http://www.teachers.ash.org.au/jmresources/pond/life.html
http://72.14.253.104/search?q=cache:DQBV43faElQJ:www.penobscotswcd.org/publications/insects.pdf+pond+insects&hl=en&ct=clnk&cd=3&gl=us&client=safari
http://www.wwtlearn.org.uk/index0.html?factfile/pond-safari.htm&2
You can get answers more quickly by doing your own searches, using the appropriate key words.
I hope this helps. Thanks for asking.