Skip to main content
. Author manuscript; available in PMC: 2013 Mar 1.
Published in final edited form as: Neurobiol Aging. 2010 Jun 8;33(3):564–568. doi: 10.1016/j.neurobiolaging.2010.04.014

Figure 1.

Figure 1

Syllables with a high repetition rate are repeated less as the bird ages. A) Spectrogram of the song for BFY68 as a middle-aged adult and as an old bird. B) Spectrogram of the song for BFY50 as a young adult and as an old bird. As the bird ages, there was an 8% (for BFY68) and a 60% (for BFY50) decrease in the duration of the highlighted syllable sequence. In BFY50, the mean number of repetitions of the syllables decreased from 8 in the middle-aged songs to 7 repetitions in the aged songs (for BFY50). In BFY68, the mean number of syllable repetitions decreased from 12 in the middle aged songs to 6 repetitions in the aged songs.