Naturalists always give the same advice to someone who wants to study birds and animals - ' keep . still and watch '. Lindsay and Stephanie Tyler did just this when they and their children were captured by Ethiopian guerrillas and held for several months, encamped at the foot of an acacia tree Here they came to terms with a scorpion as big as a small lobster, ' adopted l a friendly family of ground squirrels, and watched the colourful visitors to their bird bath- in the lid of a saucepan! Producer DILYS BREESE BBC Bristol