The living things that you found under your rock were different depending upon the location of the rock and the time of the year. Small insects seen under the rocks might be ants, millipedes, centipedes, slugs, caterpillars, spiders, beetles, and sow bugs. When you turned the rock over, the insects and worms probably moved very quickly to escape the light. The pill bugs may be curled up as a defense mechanism. You may also have found some white insect eggs.
Procedure Find a quiet place in an area where birds can be found.
Sit for several minutes and listen to the songs of the birds. Write down the bird calls you hear. In your field guide, find a description of the sound each bird makes. Explanation Birds have many distinguishing characteristics, including their calls. The killdeer seems to say killdee, killdee.