Walruses synchronise their movements with the weather

Walruses ( Odobenus rosmarus ) pile onto land at “haulouts” to rest, amazingly they seem to sync their movements using the weather. Early observers on the Chukotka coast noticed the herds tracked the barometer , walruses leaving land as air pressure fell and returning as it rose. 1 A weather system is regional, so the same falling pressure reaches distant haulouts at once, and the walruses move…