When they are flying,Great evening bat (La io) produces shout FM echolocation calls including three harmomics,of which the first one and the second one are stronger.As they fly,the first harmonic is modulated from 49.0 to 18.3kHz, the second one is modulated from 80.0 to 35.6kHz, and the third one from 87.2 to 56.7.The average duration of the calls is 3.7m. It waspredicted that Great evening bat (La io) captures big insects in the open area among foliages according to the sound characteristic analysis of echolocation calls and the analysis comparing with the echolocation calls of other bats that perch in the same cave.

研究普氏蹄蝠（Hipposideros pratti）不同状态（飞行、悬挂）下的回声定位声波特征、形态特征和生态特征（捕食策略、捕食地和食物类型）。结果表明，普氏蹄蝠的回声定位声波为CF-FM型，在不同状态下，主频率有一定的差异，飞行状态的主频率略低于悬挂状态，表明普氏蹄蝠是利用多谱勒补偿效应来适应飞行速度引起的主频率变化，以进行准确的定位和有效的捕食；同时飞行状态下声脉冲时间、声脉冲间隔时间及FM带宽略低于悬挂状态，而声脉冲重复率和能率环略高于悬挂状态，表明普氏蹄蝠在不同状态下利用不同特征的声波进行捕食。由回声定位声波推断和野外观察可知，普氏蹄蝠可能在树冠周围以盘旋方式（在昆虫高峰期）或以捕蝇器式（在昆虫高峰期之后）捕食中等偏大的振翅昆虫（如甲虫）

为研究角菊头蝠（Rhinolophus cornutus）、三叶蹄蝠（Aselliscus wheeleri）、大蹄蝠（Hipposideros armiger）、大鼠耳蝠（Myotis myotis）和大足鼠耳蝠（M. ricketti）的形态和回声定位叫声的性别差异性，明确同种蝙蝠雌雄个体对食物、栖息地等资源利用的细微差异。我们利用超声波探测仪、Batsound分析软件及SPSS11.0统计软件对5种95只蝙蝠进行了录音、声波分析和统计分析。5种蝙蝠形态性别差异性不显著，角菊头蝠、三叶蹄蝠、大蹄蝠和大足鼠耳蝠叫声频率性别差异性显著，大鼠耳蝠叫声频率性别差异性不显著。角菊头蝠雌性叫声的基频、分音、主频率高于雄性，声脉冲时间、间隔时间大于雄性，调频（FM）带宽小于雄性；三叶蹄蝠、大蹄蝠叫声的基频、主频率雄性高于雌性，调频带宽雌性小于雄性；大足鼠耳蝠叫声的主频率雄性高于雌性，FM带宽雌性大于雄性[动物学报 49（6）：742～747,2003]。

Echolocation calls of Myoti$ frater emitted during the search phase consist of brief frequency-modulated pulses. The sound signals are comprised of three harmonics of which the first one is of the highest intensity and occurs in all echolocation calls. The frequency of this fundamental harmonic ranges from 110.8 to 50.2kHz, and its duration is about 3.5ms. The second and the third harmonics are relatively weak, occurring in 50.0% and 25.0% of echolocation calls respectively, with frequencies ranging from 138.4 to 116.6 kHz for the second harmonic and from 193.6 to 170.8kHz for the third harmonic. We presume that, according to the echolocation call features, Myotis frater probably forages the insects on the ground of complex environments.