New Caledonian Crows Behave Optimistically after Using Tools - ScienceDirect
Inventive crows caught on camera making tools - CSMonitor.com
Tool Use – Barbara C. Klump
Compound tool construction by New Caledonian crows | Scientific Reports
IELTS EASY DEMO - New Caledonian Crow and The Use of Tools S12T4
New Caledonian crows can create compound tools | Max-Planck-Gesellschaft
Tool use comes naturally to crows
Hawaiian crows show their tool-using smarts | Science | AAAS
After Using Tools, Crows are Happier and Behave More Optimistically: 'The pleasure of accomplishment'
Hawaiian Crows Join Tool-Users Club - The New York Times
Crows surprise researchers with advanced tool use | Research | The Guardian
Like chess players, these crows can plan several steps ahead
Tool-Making Crows | PBS LearningMedia
To lift a crow's mood, give it a toolkit
New Caledonian crows make and use a range of tool types. The tools... | Download Scientific Diagram
Can Crows Make Mental Pictures of Tools? - The New York Times
Making tools gives crows a big food boost | Ars Technica
New Caledonian crows can create tools from multiple parts | University of Oxford
ScienceShot: Tool-Using Crows Eat Well | Science | AAAS
Tool Use Puts New Caledonian Crows in a Good Mood/ Curr. Biol., Aug. 1, 2019 (Vol. 29, Issue 16) - YouTube
Wild New Caledonian crows possess tool-craft talent - BBC News
Flying Free—Again – San Diego Zoo Wildlife Alliance Stories
Crows share tricks of the trade
