A little off-topic, but I recall a video where the shadows cast by termite mounds along the Amazon River were used to estimate the length of a snake photographed that was swimming in the river. Old photograph, taken from a plane. Basically, evidence that there are some BIG anacondas out there.
Don't know if true, or not, and don't recall the est. length, as I watched it several years ago.
Anyway, I'm impressed by the industry of the South American termites.
Had no clue.
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