Nature Club – June 2016 – Earthworm Watch and Minibeast Hunt

5099: Looking for earthworms
More Citizen Science for our young scientists! We took part in a national survey of earthworms called Earthworm Watch by looking at earthworms on Wanstead Flats and seeing what kind of soil we have. We dug a hole in a recently cleared patch of earth where some tree had been cut down. It was very hard as it had probably never been dug before and had tree roots and lumps of yellow clay. Ruduo was a terrific digger. Then we carefully sifted through the dark brown surface soil we had dug out and found 6 pale coloured surface- feeding worms, one of which had a ‘saddle’ which told us it was an adult. Then we poured a mustard powder and water mixture in the hole to see if there were any deep-living worms down there at the bottom. Worms don’t like this, so they come out. Mustard must be too hot for their taste, but it does not hurt them. We saw two more longer and darker worms appear!
We also did a test with a few of drops of vinegar to see if the soil fizzed. It did not so we learnt that it was not a limestone soil. We could squeeze handfuls of soil in to sausage and patty shapes which told us it was not a sandy soil but a clay soil. This is typical of the soil in the Thames Valley area where we live.
We also went looking for minibeasts amongst the lovely waving flowering grasses and found some beautiful spiders carrying their young in egg sacs between their spinners. We identified them as a wolf spider and a nursery web spider.
7 children today.

Leave a Comment