Haruspication: fortune telling (e.g. weather forecasting) using animal innards
From environmentalgraffitti.com:
Paul Smokov, an 84 year old cattle rancher from Steele, N.D., claims that he has forecasted the weather with 85% accuracy by observing the shape of pig spleens. The National Weather Service, with their millions in high tech equipment, is about 60% accurate.
Smokov may be the last pig spleen weather forecaster left in North America. The editor of the Old Farmer’s Almanac said the only other spleen reader she had come in contact with had died in Saskatchewan, Canada last year.
Smokov learned the subtle art of spleen reading from his parents, Ukranian immigrants who arrived in the US in the early 20th century. With weather being so important to farmers, and a decades long lack of electricity at the family ranch denying radio forecasts, the family kept the practice of spleen forecasting alive.