For a chuckle – – I guess this does relate to roofing somewhat:
Crows are so smart!

The site by Chris Hall (who died in 2020) on designing and building in solid wood, emphasizing joinery with minimal use of glue or metal fasteners. Currently maintained by Chris's spouse/widow.
For a chuckle – – I guess this does relate to roofing somewhat:
Crows are so smart!