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Author | Title | Year | Publication | Serial | Volume | Pages |
---|---|---|---|---|---|---|
Tebbich, S.; Seed, A.M.; Emery, N.J.; Clayton, N.S. | Non-tool-using rooks, Corvus frugilegus, solve the trap-tube problem | 2007 | Animal Cognition | 2429 | 10 | 225-231 |
Bugnyar, T.; Heinrich, B. | Pilfering ravens, Corvus corax, adjust their behaviour to social context and identity of competitors | 2006 | Animal Cognition | 2449 | 9 | 369-376 |
Heinrich, B.; Bugnyar, T. | Just how smart are ravens? | 2007 | Scientific American | 4101 | 296 | 64-71 |