Corvus - Wikipedia
https://en.m.wikipedia.org/wiki/Corvus
Corvus
https://es.wikipedia.org/wiki/Corvus
How Smart Are Crows? | ScienceTake | The New York Times
Are Crows the Ultimate Problem Solvers? | Inside the Animal Mind | BBC Earth
Crows, smarter than you think | John Marzluff | TEDxRainier
You've Heard of a Murder of Crows. How About a Crow Funeral? | Deep Look
Corvidae
https://en.wikipedia.org/wiki/Corvidae
Corvidae
https://es.wikipedia.org/wiki/Corvidae
Crow as Clever as Great Apes, Study Says
https://www.nationalgeographic.com/animals/2004/12/crow-as-clever-as-great-apes-study-says/
Bird intelligence
https://en.wikipedia.org/wiki/Bird_intelligence
Tool-Making Crows Are Even Smarter Than We Thought | Nat Geo Wild