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dent could easily identify some very tiny "critters," and she was quite a hit with the children who kept holding up fingers with insects on them for her to identify.
Some of the critters are very intolerant of pollution. Others can tolerate some pollution, and still others can live in very polluted water.
Mr. Gillium explained that the latter group can live in clean streams also and that their presence is not an indication that a stream is polluted, unless they are the dominant life form found.
From the Thornton River above Sperryville stone flies, mayflies, riffle beetles and a hellgramite were located. They are in the group that cannot tolerate pollution. Sowbugs, and fishflies were also found from the second group.
There was some disappointment that crayfish were not found, because Mr. Gillium had promised to put them on his ears and wear them as earrings.
A few of individuals from the group of pollution tolerant insects were also found. All in all, that section of the river rated good. The report noted all the varieties of "critters" found, but there was also space to note the condition of the stream bank, the flow of the stream at that point, and list uses of land up river from the section sampled.
Mr. Gillium agreed that the number if "critters" identified was probably low because of the recent flooding, aind that was noted on the report also.
He said that ideally three separate samples should have been taken and the report submitted on the best one.
The county Extension Service has a $300 grant to use in implementing a 4H program of water monitoring, and organizer Hunt Harris expects to follow up the activity with a more organized 4-H group and perhaps groups from the schools.
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