Abstract: The Beijing Barbastelle (Barbastella beijingensis) is endemic to China and has limited information on its calls, diet and distribution. In July 2023, five Barbastelle bats were captured in a mine cave in Suanzaoping Village, Houjiazhuang Town, Xingtai City, Hebei Province (37°22'15. 59″N, 114°02'16. 8″E, 727 m elevation). We collected the bats' feces, echolocation calls, distress calls, and morphological data. These individuals are medium-sized, with a forearm length of (43. 8 ±1. 6) mm. There is a connection between the ears at the forehead, the outer ear contour is nearly square and has a distinct transverse ridge, and the middle outer edge has a smaller ear protrusion. The skulls are narrow and long, with a total length of 15. 50 mm to 16. 02 mm, a smooth skull top, and a larger interorbital distance. Based on external morphology, cranial parameters, and molecular phylogenetic analysis (Cyt b and ND1 genes), the captured individuals were identified as B. beijingensis. The echolocation calls of the B. beijingensis are frequency-modulated, with the highest energy at the second harmonic, a peak frequency of (70. 90 ±3. 75) kHz, a bandwidth of (26. 17 ±4. 96) kHz, and a pulse duration of (2. 89 ±1. 13) ms. The distress calls were divided into three simple syllables (long downward frequency modulation, short downward frequency modulation, and wrinkled frequency modulation) and one compound syllable (noise-wrinkled frequency modulation). The diet mainly consists of insects from the order Lepidoptera (relative read abundance 99. 7%), as well as a small amount of insects from the orders Blattodea, Diptera, and Hymenoptera. This discovery represents a new bat species record for Hebei Province, and it enriches the acoustic and dietary data of the B. beijingensis, providing basic data for subsequent in-depth research.

Key words: Barbastella beijingensis, Chiroptera, New record, Hebei Province, Calls, Diet

摘要： 北京宽耳蝠(Barbastella beijingensis)为中国特有种，然而有关其声波、食性、分布等方面的信息匮乏。2023年7月于河北省邢台市侯家庄镇酸枣坪村矿洞捕捉到5只宽耳蝠个体，测量其体型特征，采集其回声定位声波、胁迫叫声和粪便。5只个体体型中等，前臂长(43.8 ±1.6) mm，双耳相连于前额，外耳郭近方形且具有明显横嵴，中部外缘具有较小的耳突。头骨狭长，颅全长15.50~16.02 mm，颅顶平滑，眶间距较大。综合外部形态、头骨参数和分子系统发育分析(Cyt b和ND1基因)，确定捕获个体为北京宽耳蝠。北京宽耳蝠的回声定位声波为调频声波，能量最高处在第二谐波，峰频为(70.90 ±3.75) kHz，带宽为(26.17 ±4.96) kHz，脉冲持续时间为(2.89 ±1.13) ms；胁迫叫声共划分出3种简单音节(长下调频、短下调频和皱状调频)和1种组合音节(噪声-皱状调频)；食物组成以昆虫纲鳞翅目(相对读长丰度99.7%)为主，少量蜚蠊目、双翅目和膜翅目昆虫。此次发现为河北省翼手目新纪录，同时丰富了北京宽耳蝠的声波和食性资料，为后续深入开展相关研究提供基础数据。

关键词: 北京宽耳蝠, 翼手目, 新纪录, 河北省, 声波, 食性