| http://www.w3.org/ns/prov#value | - Climatic variables such as humidity, precipitation and temperature can also be important; for example, call frequency correlates positively with body temperature (Huffman & Henson 1993), while a negative association with humidity detected in Hipposideros ruber might be due to the attenuation of higher frequencies in moist air (Guill??n Servent et al. 2000).
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