## 5 Discussion
Similarly, the greatest presence of multi-events, three or more events simultaneously, occurred in the morning (06:00-11:00 h) and at night (18:00-23:00 h), and these were evident over many seconds. This could be due to the presence of periodic anthropogenic activities, which are associated with the start and end of daily activities in the city, especially daily peaks of intense vehicle traffic, that have an impact on the natural habitat. When we disaggregated the data of the global temporal evolution of classes at the level of wetlands, as observed in Figure 8, we found, through the single-event analysis at the early morning period, that the Miraflores wetland had a greater number of sonic events of amphibians (62%) compared with the El Bosque wetland (20%), as explained above, as well as in comparison to the Angachilla wetland (18%). Similarly, the Angachilla wetland had a greater number of sonic events of dogs (46%) compared with the El Bosque (29%) and Miraflores (25%) wetlands. Furthermore, as observed in Figure 8, one of the most apparent sonic changes observed in these three habitats between the early morning and morning periods was associated with sonic patterns of amphibian and bird activity. Specifically, the amphibian event occurred earlier at dawn compared with the bird event, which leads us to define the offset time of the daily sonic activity of amphibians in the early morning and the onset time of the daily activity of birds in the morning. Our results are consistent with those of previous studies that demonstrate that birds avoid exposure to artificial light at night [56], and that the calling activity of amphibians starts around sunset and extends to the first half of the night [57]. One non-natural sonic event that was present in the data shown in Figure 8 was the motor event along with its combination with the bird event, which is represented in the (motor \(+\) bird) sonic class. As observed in the figure and for the three habitats, in the morning (06:00-11:00 a.m.), 45% of the (motor \(+\) bird) class occurred in the Mirafloreswetland, 28% in the El Bosque wetland and 27% in the Angachilla wetland. Meanwhile, in the evening (12:00-17:00 p.m.), 56% of the (motor + bird) class occurred in the Miraflores wetland, 24% in the El Bosque wetland and 20% in the Angachilla wetland. Finally, at night (18:00-23:00 p.m.), 45% of the (motor + bird) class occurred in the Miraflores wetland, 29% in the El Bosque wetland and 26% in the Angachilla wetland. We deduce from this result that the habitat patch associated with the greatest presence of the (motor + bird) class was the Miraflores wetland in the morning, in the evening and at night. Our result is consistent with the location of this habitat in an urban mixed residential and industrial area, with the presence of factories working around it that operate 24 h a day, indicating a strong influence of the motor event. In the comparison by wetlands according to geographical origin, we observed in Figure 9 (left) that there are sets of characteristics that overlap between habitats as well as distant groups. The Angachilla wetland shows features that are mostly grouped. The El Bosque wetland not only shares features with the other two wetlands but also shows its own group of features as if it were a single independent group, while the Miraflores wetland is the one that is more dispersed in terms of its features. These results indicated that there are acoustic similarities, which are reflected in the groups that share features. This can be important for our first hypothesis. However, there is clearly a number of features of each wetland separated from the others, which shows that there are also differences between them.