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Crow water displacement experiment.
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Previously:
https://www.homemadetools.net/forum/...923#post137512
https://www.homemadetools.net/forum/...287#post138723
https://www.homemadetools.net/forum/...4401#post79888
https://www.homemadetools.net/forum/...700#post147868
https://www.homemadetools.net/forum/...213#post134760
The American Black Crow is thought to be the smartest of all birds, and may have an even larger brain proportionately to humans
Crows are very intelligent and seem to be able to understand some simple mechanics...
https://www.youtube.com/watch?v=Gui3IswQ0DI
Had pet crows and pet ravens as a kid growing up on a cattle ranch, both are very intelligent.
There was a case where traffic cameras caught a crow taking some type of nut or pod to a crosswalk at an intersection. When the light turned red, the crow would drop one in the crosswalk, fly up to a perch and wait. After the light turned, the cars went through and some would run over the pods. When the light turned red again the cars would stop and the crow would fly down and eat the nut meat then do it all over again.