Co-word network for urban dawn chorus studies showing the most frequently studied topics via author keywords (n = 50). Some keywords were omitted to avoid overlapping terms. Node size represents keyword frequency and links the frequency of keyword co-occurrence. Colours represent clusters of keywords with a high degree of connectedness

Number of accumulated documents focused on bird dawn choruses published by year. Pie chart shows the proportion of studies by main topic.

Word cloud synthesizing the most frequently studied topics of urban bird dawn choruses based on the title of the reviewed publications.