Green tree ants swarm over oak blue caterpillars but they are not attacking them. They are drinking a sweet liquid that the caterpillars give off especially to attract the ants. The ants act like living armor, shielding the caterpillar from wasps that might lay eggs on it. The ants and the caterpillars are partners in nature.
Waste not
Waste not Human manure, which is a by-product of sewage
treatment, is often used as a fertilizer on crops. However, it is
not always treated to remove harmful bacteria, and there is
disagreement on the effectiveness of treatment methods. If the
manure is not properly treated and the bacteria remains on the food
crops when they are harvested, they can cause illness in humans
when they are eaten. 29 AUGUST 1998, P. 26-30
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