Studies in Indiana and Missouri using remote recording Anabat detectors demonstrated how the use of multiple detectors in a survey area increases the probability of detection of bats. This research highlighted important differences in probability of detection, using remote recording bat detectors, in different survey areas. Recommendations were made for the use of detection probabilities when using such survey techniques to compare between areas.

Estimating Probabilities of Detection for Bat Echolocation Calls: An Application of the Double -Observer Method, Joseph E. Duchamp, Mark Yates, Rose-Marie Muzika, Robert K. Swihart, Wildlife Society Bulletin, Vol. 34, No. 2 (Jun., 2006), pp. 408-412

There is a growing body of evidence that bats' echolocation is not only important for finding prey and navigation, but also in communication. A laboratory-based study demonstrated Noctules (Nyctalus noctula) were able to find suitable roosts faster when able to 'eavesdrop' on echolocation of their conspecifics. Little Brown bats (Myotis lucifugus) are thought to be able to home in on foraging sites by listening in on successful foragers of the same species up to over 50m away.

Sensory Ecology: Echolocation Calls Are Used for Communication, Gareth Jones, Current Biology, Vol. 18 No. 1 (Jan 2008), pp. R34-35

Scientists investigated the potential of automated species identification using an artificial neural network (ANN). When played time expanded calls of varying quality recorded from time expansion bat detectors, the ANN was able to identify a greater percentage of bats to genus and species levels than human test subjects. This study highlighted the possibility of using such automated systems to process large quantities of data from remote recording bat detectors.

Human vs. machine: identification of bat species from their echolocation calls by humans and by artificial neural networks, N. Jennings, S. Parsons, M.J.O. Pocock, Canadian Journal of Zoology, Vol. 86, No. 5 (May 2008), pp. 371-377(7)

A new fossil of a primitive bat found in early Eocene deposits in Wyoming, USA sheds light on the evolution of flight and echolocation in Chiroptera. It has been long disputed which evolved first; flight or echolocation. The Wyoming fossil forelimb anatomy suggests it was capable of powered flight. However the ear structure of this primitive bat makes it unlikely it was capable of echolocation, supporting the 'flight first' hypothesis.

Primitive Early Eocene bat from Wyoming and the evolution of flight and echolocation, Nancy B. Simmons, Kevin L. Seymour, Jörg Habersetzer & Gregg F. Gunnell, Nature, Vol. 451 (Feb 2008), pp. 818-821

Researchers have employed automated remote recording of echolocation calls using Anabat bat detectors in a study of occupancy analysis of the Hawaiian hoary bat (Lasiurus cinereus semotus). Not only did the work demonstrate the value of such bat detection systems in occupancy analysis, but raised the need for such studies to conduct recording over a series of nights or sites to gain meaningful and accurate results. It has been suggested that the occupancy analysis techniques used will be of use in an effective survey and monitoring scheme for the Hawaiian hoary bat and other solitary species worldwide.

Assessing Bat Detectability and Occupancy with Multiple Automated Echolocation Detectors, P. Marcos Gorresen, Adam C. Miles, Christopher M. Todd, Frank J. Bonaccorso, Theodore J. Weller, Journal of Mammalogy, 2008 89:1, pp. 11-17