I have known about the TED lectures for years, but only recently dived into the random search smorgasboard. And I cam upon this gem - I know it isn't photography but, heck, I hope you will forgive me. I know the crows are really intelligent but I found it fascinating and wanted to share:
https://www.ted.com/talks/joshua_klein_on_the_intelligence_of_crows
https://www.ted.com/talks/joshua_klein_on_the_intelligence_of_crows