1. Songbird frequency selectivity and temporal resolution vary with sex and season by Megan D. Gall, Therese S. Salameh, and Jeffrey R. Lucas Proceedings B Volume 280(1751):20122296 January 22, 2013 ©2013 by The Royal Society

2. (a) Auditory filter equivalent rectangular bandwidth (ERB), (b) auditory filter quality (QERB) and (c) auditory brainstem response (ABR) recovery as a function of sex and season in the house sparrow. Megan D. Gall et al. Proc. R. Soc. B 2013;280:20122296 ©2013 by The Royal Society

3. (a,b) Auditory filter equivalent rectangular bandwidth (ERB) and (c,d) auditory filter quality (QERB) as a function of sex, season and frequency in house sparrows. Megan D. Gall et al. Proc. R. Soc. B 2013;280:20122296 ©2013 by The Royal Society

4. (a,b) Auditory brainstem response (ABR) recovery as a function of sex, season and inter- stimulus interval in house sparrows. Megan D. Gall et al. Proc. R. Soc. B 2013;280:20122296 ©2013 by The Royal Society