<b>MAMMALS IN URBAN CENTERS: a dataset for Brazil</b>

The continuous growth of the urban population, coupled with habitat loss, has resulted in unanticipated interactions between animals and humans in urban centers. In this study, we investigated the presence of mammals in urban centers through newspaper reports on websites. Specifically, we examined: i) the frequency of photographic records, ii) the temporal trends (2001 to 2021) and spatial trends (Brazilian regions and states) of the records, iii) the orders, families, and species most frequently reported in urban centers. We searched for news on the Google platform (http://www.google.com.br). We employed combinations of the keywords "mammals in urban centers," "mammals found in the city," and "mammal found in the municipality." We excluded repeated news items, sites that experienced technical problems during the search period, and those that did not cover the topic. We compiled a total of 733 websites. Of the total number of sites, 89% (n = 652) had photographic records. The records spanned from 2002 to 2021, with 73% (n = 534) occurring in the last four years. The Southeast (41%, n = 302), South (25%, n = 182), and Midwest (18%, n = 129) regions stood out. The animals recorded belonged to 55 mammal species (16 vulnerable and 3 endangered), distributed in 22 families and 10 orders. This is the first study that utilize websites for diagnosing the mammal fauna present in urban centers in Brazil. The dataset generated here could aid in understanding the occurrence of mammal species in the urban environment.

城市人口的持续增长加之栖息地丧失，引发了城市中心区域人与野生动物间的非预期互动。本研究依托网络平台刊载的新闻报道，对城市中心的哺乳动物存在情况开展调研，具体考察维度包括：其一，影像记录的出现频次；其二，记录的时间变化趋势（2001年至2021年）与空间分布趋势（巴西各区域及州域）；其三，城市中心区域报道频次最高的哺乳动物的目、科及物种。

本研究在谷歌平台（http://www.google.com.br）进行新闻检索，采用的关键词组合为“城市中心的哺乳动物”“城市中发现的哺乳动物”以及“市域范围内发现的哺乳动物”。研究过程中，我们剔除了重复新闻、检索期间出现技术故障的站点，以及与主题无关的站点，最终共整理得到733个有效站点。其中89%（n=652）的站点包含影像记录，所有记录的时间跨度为2002年至2021年，且73%（n=534）的记录集中于最后四年。从空间分布来看，东南区域（41%，n=302）、南部区域（25%，n=182）与中西部区域（18%，n=129）的记录占比最高。

本次记录的哺乳动物共计55种（其中16种为易危物种、3种为濒危物种），隶属于22个科、10个目。本研究是巴西国内首次通过网络平台调研城市中心哺乳动物区系的学术工作，本次生成的数据集可为解析城市环境中哺乳动物物种的出现规律提供有益支撑。