To lift a crow's mood, give it a toolkit
Hawaiian crows show their tool-using smarts | Science | AAAS
Tool-using crow: Rare bird joins clever animal elite - BBC News
Stone the crows! Bird brains smarter than you think - NZ Herald
Crows really enjoy using tools, researchers find - ABC News
Hawaiian Crows Join Tool-Users Club - The New York Times
Making tools gives crows a big food boost | Ars Technica
Why clever crow is no bird brain
Wild cockatoos observed making and using tools to eat sea mango pits
Tool use comes naturally to crows
Animal Tool-Use - ScienceDirect
Watch cockatoo genius chew out a tool from a piece of cardboard | New Scientist
Bird Brainy
Crows Carry Cameras for Science
Insightful problem solving and creative tool modification by captive nontool-using rooks | PNAS
Wild New Caledonian crows possess tool-craft talent - BBC News
Crows surprise researchers with advanced tool use | Research | The Guardian
Tool-Making Crows Are Even Smarter Than We Thought | Nat Geo Wild - YouTube
New Caledonian crow (Betty) retrieving a bucket using a hook tool... | Download Scientific Diagram
Avian Enrichment - Tool Use in Parrots
Are you a Bird Brain?
Intelligent Crows Use Tools
Tool use to crow about
