Table 2 Phase 3: Rodya’s performance. The data are presented for all 60 trials. In trials where the crow pulled two ends, the number of successful trials out of the total number of trials is provided.
From: Some Hooded crows (Corvus cornix) understand how a loose string works
Trial type | Strategy used | Rodya’s performance | ||
|---|---|---|---|---|
Number of trials | ||||
Left end first | Middle end first | Right end first | ||
Short string on right side | Pulled two ends | – | 9/9 | 0/2 |
Pulled three ends | – | – | 9 | |
Altogether | – | 9 | 11 | |
Short string on left side | Pulled two ends | – | 0/7 | 8/8 |
Pulled three ends | – | – | 5 | |
Altogether | – | 7 | 13 | |
Short string in the middle | Pulled two ends | – | 0/2 | 4/6 |
Pulled three ends | 1 | – | 11 | |
Altogether | 1 | 2 | 17 | |
Total number of trials | 1 | 18 | 41 | |
