Table 3.
Occurrence of possible chemical cues that may be involved in the active response of R. chiwen to the stimuli used in the chemical test
| Chemical cue | Stimulus |
|||
|---|---|---|---|---|
| Purified BD (Moderate) | Toad (Weak) | BD firefly (High) | Non-BD firefly (Moderate) | |
| Firefly-type BDs | – | – | + | – |
| Multiple compounds of BDs | – | + | + | – |
| Sufficient amount of BDs | + | – | + | – |
| Chemical substances other than BDs that are common to lampyrid fireflies | – | – | + | – |
The response of the snake toward each stimulus is shown in parentheses. +: absent, –: present.