Prove the proverb!
QWhat’s the science behind the expression ‘Swallows high, fine and dry. Swallows low, wind will blow’?
AJONNY CROCKETT replies: Swallows feed on the wing, i.e. they swoop on flying insects. The insects are very sensitive to barometric pressure. They need to be because the only place they have to shelter in the event of rain is under leaves and branches. If the barometric pressure is high then there will be good weather as a high-pressure area passes over. This means that they can fly higher and so the swallows fly higher to feed. If a low-pressure area approaches it indicates that wind and poor weather is due. The insects fly nearer to shelter, and the swallows follow them, flying low.