Bear.
Among the backwoodsmen of America there was a superstition that bears breed only once every seven years, and when they did this caused such a disturbance in the atmosphere that any cattle in the district which were about to calve would lose their young.
From "A DICTIONARY OF OMENS AND SUPERSTITIONS" by Philippa Waring. https://www.instagram.com/p/CA5Y7HaBrTw/?utm_source=ig_web_copy_link