To lift a crow's mood, give it a toolkit
Compound tool construction by New Caledonian crows | Scientific Reports
Inventive crows caught on camera making tools - CSMonitor.com
Using Tools Puts Crows in a Good Mood | Inside Science
Tool-Making Crows | PBS LearningMedia
Crows share tricks of the trade
Tool use comes naturally to crows
Like chess players, these crows can plan several steps ahead
How Crows Use Tools to Solve Problems
New Caledonian Crows Behave Optimistically after Using Tools - ScienceDirect
Hawaiian crows show their tool-using smarts | Science | AAAS
Unedited videos reveal the sophisticated tool-using behavior of Hawaiian crows | Ars Technica
Flying Free—Again – San Diego Zoo Wildlife Alliance Stories
Geometry of tool-holding in NC crows.(a) NC crows often hold tools... | Download Scientific Diagram
Cameras capture never-before-seen footage of wild crows building tools - The Washington Post
New Caledonian crows' clearly profit from the care and craftsmanship they put into their tools – A new zoology thing for curious kids – 2 New Things
Tool use to crow about
New Caledonian crows can create tools from multiple parts | University of Oxford
Crafty New Caledonian Crows Can Assemble Tools | Smart News| Smithsonian Magazine
New Caledonian crows keep 'valuable' hooked tools safer than basic non-hooked tools | eLife
Like humans, crows are more optimistic after making tools to solve a problem — Harvard Gazette
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 Crows Learn by Doing – The Wire Science
