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Fig. 4. Number of chirps (A) and rises (B) (mean ± s.e.m.) produced before
(S, spontaneous), during (E, evoked), and after (P, post-stimulus) stimulus
presentation. (A) Both A. leptorhynchus and A. albifrons
produced more chirps during stimulation (E) than before stimulus onset (S) or
after stimulus offset (P). (B) Both species produced more rises after stimulus
offset (P) than before stimulus onset (S) or during stimulus presentation (E).
Data points within each species that have different letters differ
significantly from each other; Tukey's HSD, P<0.05.