All the old lore about birds being able to predict the weather—"If crows fly in pairs, expect fine weather; a crow flying alone is a sign of foul weather"—might not be strictly true. But, according to Ornithology, there are things that our feathered friends can tell us about what's about to happen in the atmosphere. For example, barometric changes in advance of a storm causes birds to perch, rather than fly—hence, we notice birds lined up on a power line before rain or cold temperatures hit, as well as feeding when they first rise in the morning so they won't have to forage when the weather is inclement. Changes in barometric pressure are also what prompts birds to migrate in spring and autumn. Here are more bizarre things that happen when it's about to storm.
"Trout jump high, when a rain is nigh"—fact or fiction, wonders the BBC. Perhaps a bit of both. It turns out, changes in barometric pressure can be felt by animals that live under water as well those that inhabit the skies. As Accuweather puts it, "When rain is 'nigh' or impending, low-pressure systems generally occur…[and] cause plant particles that were trapped at the bottom of a lake to rise. When this occurs, microscopic organisms are dispersed in the water and provides feed for small fish. The small fish, in turn, become food for larger fish." And when this happens, many fish—probably not just trout—increase their leaping activity.
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These gentle, woolly ruminants, once used to mow the White House lawn, have a weather-related rhyme all their own: "When sheep gather in a huddle, tomorrow will have a puddle." How Stuff Works hypothesizes that this commonly observed behavior might have something to do with sheep knotting together in order to keep one another warm before precipitation begins to fall. The site also notes that much more "disgusting" theories abound about how sheep activity has weather-based meaning, including that heavy urination in their pens means heavy rain and that bright yellow pee is a harbinger of sunny weather. Check out these 27 "facts" about animals you have all wrong.
13 Animals That Can (Supposedly) Predict the Weather, Source:https://www.rd.com/culture/animals-that-can-supposedly-predict-weather/