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This topic has appeared in the trending rankings 1 time(s) in the past year. While it does not trend frequently, its appearance suggests a renewed or concentrated surge of public interest.
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Fred_and_Norah_Urquhart entered the ranking for the first time today at position #. This is its highest position ever recorded.
This topic has appeared in the English Wikipedia rankings 1 time. It first appeared on 2026-08-26 and was most recently seen on 2026-08-26.
Frederick Albert Urquhart was a Canadian zoologist and professor of zoology who studied the migration of monarch butterflies, Danaus plexippus L. Together with his wife, Norah Roden Urquhart, he identified their migration routes, discovered that the migration spans multiple generations of butterflies, and found their wintering place in Mexico—considered "one of the greatest natural history discoveries" of the 20th century.
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