Wilkinson R, Howse P E
Z Tierpsychol. 1975 Sep;38(2):200-11. doi: 10.1111/j.1439-0310.1975.tb01999.x.
Temporal characteristics of the vocalizations of bullfinches were investigated. The calls produced by experimentally isolated bullfinches were subjected to sonagraphic analysis. Within individual, between individual, and local variation in these calls was demonstrated. Several categories of calls were described, of which those termed "sequence calls" contained the greatest amount of information on which individual recognition could be based. Contact calls were individually distinctive in terms of their duration but with the exception of those produced by one female these lacked the structural complexity and information content of the sequence calls.
对灰雀鸣叫的时间特征进行了研究。对实验隔离的灰雀发出的叫声进行了声谱分析。证明了这些叫声在个体内部、个体之间以及局部存在差异。描述了几类叫声，其中被称为“序列叫声”的叫声包含了最多可用于个体识别的信息。接触叫声在持续时间上具有个体独特性，但除了一只雌性发出的叫声外，这些叫声缺乏序列叫声的结构复杂性和信息含量。
