New Caledonian crows keep 'valuable' hooked tools safer than basic non-hooked tools | eLife
Tool Use Puts New Caledonian Crows in a Good Mood/ Curr. Biol., Aug. 1, 2019 (Vol. 29, Issue 16) - YouTube
Can Crows Make Mental Pictures of Tools? - The New York Times
New Caledonian crows can create tools from multiple parts | University of Oxford
Crows surprise researchers with advanced tool use | Research | The Guardian
Using Tools Puts Crows in a Good Mood | Inside Science
Making tools gives crows a big food boost | Ars Technica
Unedited videos reveal the sophisticated tool-using behavior of Hawaiian crows | Ars Technica
Tool Use – Barbara C. Klump
Like chess players, these crows can plan several steps ahead
How Crows Use Tools to Solve Problems
Unique beak evolved with tool use in New Caledonian crow | Cornell Chronicle
Tool-Making Crows | PBS LearningMedia
Hawaiian Crows Join Tool-Users Club - The New York Times
Compound tool construction by New Caledonian crows | Scientific Reports
Geometry of tool-holding in NC crows.(a) NC crows often hold tools... | Download Scientific Diagram
Tool-Making Crows Are Even Smarter Than We Thought | Nat Geo Wild - YouTube
Like humans, crows are more optimistic after making tools to solve a problem — Harvard Gazette
IELTS EASY DEMO - New Caledonian Crow and The Use of Tools S12T4
New Caledonian crows can create compound tools | Max-Planck-Gesellschaft
Clever Crows Use Tools in New Way | WIRED
New Caledonian Crows Behave Optimistically after Using Tools - ScienceDirect
Tool use comes naturally to crows
