Experiment Details: Songbirds work around computational complexity by learning song vocabulary independently of sequence

Songbirds work around computational complexity by learning song vocabulary independently of sequence

The authors tracked the development of vocal combinatorial capacity and aim to find a common, stepwise pattern of acquiring vocal transitions across species.

Hunter College and City College of The City University of New York

08.2010-10.2018

Male zebra finches were isolated in a sound attenuation chamber and recorded with a single microphone. The birds were reared by a female adult (in the absence of adult males) between days 7–30 post-hatch and then they were singly housed in the chamber. The entire song development was recorded: song activity was automatically detected and continuously saved (sampling frequency 32 kHz) throughout the experiment. From 33–39 day post hatch(dph) until 43 dph birds were passively exposed to 20 playbacks per day of the tutor song, occurring at random with a probability of 0.005 per second. On day 43, each bird was trained to press a key to hear song playbacks, with a daily quota of 20 songs. The recordings also captured the playbacks of tutor songs, we removed these playbacks from the dataset.

Recording and training were done in a sound attenuation chamber and recorded with a single microphone, using Sound Analysis Pro.

Zebrafinch(Taeniopygia castanotis)

Zebra finch (Taeniopygia castanotis)

Besides the vocalizations, recordings also contain other sounds produced by that animal such as wing flaps, tail shakes, and sounds elicited when the animal interacted with the environment (e.g. pecking on the floor).

Zebra finches (Taeniopygia guttata) are small songbirds measuring 10–12 cm in length and weighing around 12–15 grams. They exhibit striking sexual dimorphism, with males featuring bright orange cheek patches, black-and-white barred throats, and chestnut-colored flank patches, while females are more subdued in coloration, lacking these bold patterns.

Songs: Zebra finch songs often start with a series of repeated brief introductory notes followed by repeated song motifs. Song motifs are composed of stereotyped sequences of song syllables separated by short gaps. Each song syllable features a distinct spectro-temporal sound pattern. In an adult, there is little variability across different renditions of a given song syllable. In a juvenile, song syllables are much more variable without any clearly discernable types. Juveniles gradually refine their vocalizations during development until they achieve a crystallized adult song that resembles their tutor's song. Calls: All vocalizations that are not part of a song are called calls. Calls tend to be simpler in their acoustic structure compared to song syllables, and most calls are composed of harmonic sounds. A call could be produced in isolation or as part of a repetitive sequence of calls.

Zebra finches are small songbirds native to Australia. Zebra finches are a highly social species living in colonies ranging from a few pairs to over 100 individuals.

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I will annotate all individuals

No

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