Journal ArticleDOI
Radar data on wing-beat frequencies and flight speeds of two bat species
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In this paper, the first time radar recorded flight paths and wing-beat pattern of two identified Palaearctic bat species, Nyctalus noctula and Eptesicus serotinus, was presented.Abstract:
This paper presents for the first time radar recorded flight paths and wing-beat pattern of two identified Palaearctic bat species. Simultaneous film recordings confirm the wing-beat pattern reflected by echo signatures. Our results suggest that discrimination of bats and nocturnally migrating birds is usually possible because the recorded bats differed from the regular flapping and pausing phases in passerines' bounding flight as well as from the regular continuous wing-beats of other nocturnal migrants (e.g., waders and waterfowl) by very short and irregularly distributed glides (flap-gliding). Small, medium and large bats may be differentiated according to wing-beat frequency. For the discrimination of the similarly sized Nyctalus noctula and Eptesicus serotinus (both with mean frequencies of 7–7.5 Hz and variation mainly between 6 and 8 Hz) ecological or behavioural features must be included. The lowest rates of flapping (even below 5 flaps per second) occurred because some flaps were prolong...read more
Citations
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Journal ArticleDOI
Assessing Impacts of Wind-Energy Development on Nocturnally Active Birds and Bats: A Guidance Document
Thomas H. Kunz,Edward B. Arnett,Brian M. Cooper,Wallace P. Erickson,Ronald P. Larkin,Todd J. Mabee,Michael L. Morrison,M. Dale Strickland,Joseph M. Szewczak +8 more
TL;DR: The purpose is to provide researchers, consultants, decision-makers, and other stakeholders with guidance to methods and metrics for investigating nocturnally active birds and bats in relation to utility-scale wind-energy development.
Journal ArticleDOI
Aeroecology: probing and modeling the aerosphere
Thomas H. Kunz,Sidney A. Gauthreaux,Nickolay I. Hristov,Jason W. Horn,Gareth Jones,Elisabeth K. V. Kalko,Ronald P. Larkin,Gary F. McCracken,Sharon M. Swartz,Robert B. Srygley,Robert Dudley,John K. Westbrook,Martin Wikelski +12 more
TL;DR: Understanding how organisms such as arthropods, birds, and bats aloft are influenced by a dynamic aerosphere will be of importance for assessing, and maintaining ecosystem health, human health, and biodiversity.
Journal ArticleDOI
Bats on the move
TL;DR: Recently, there has been an increase in the number of publications on bat migration and an overall growing interest among bat researchers that culminated in the 1st International Symposium on Bat Migration in Berlin in January 2009.
Journal ArticleDOI
Wing‐beat characteristics of birds recorded with tracking radar and cine camera
TL;DR: In this paper, the authors present wing-beat frequency data measured mainly by radar, complemented by video and cinematic recordings, for 153 western Palaearctic and two African species.
Journal ArticleDOI
Automatic identification of bird targets with radar via patterns produced by wing flapping
TL;DR: This work presents a classification algorithm aimed at automatic recognition of bird targets that provides a substantial gain of time when birds must be identified in large collections of radar signals and represents the first substantial step in developing a real time bird identification radar system.
References
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Journal ArticleDOI
Ecological Morphology and Flight in Bats (Mammalia; Chiroptera): Wing Adaptations, Flight Performance, Foraging Strategy and Echolocation
TL;DR: Bat wing morphology is considered in relation to flight performance and flight behaviour to clarify the functional basis for eco-morphological correlations in flying animals, and adaptive trends in wing adaptations are predictably and closely paralleled by echolocation call structure.
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The echolocation and hunting behavior of Daubenton's bat, Myotis daubentoni
TL;DR: The echolocation and hunting behavior of Daubenton's bat (Myotis daubentoni) was studied in the field under completely natural conditions using a multiflash photographic system synchronized with high-speed tape recordings to corroborate the hypothesis that the minimum detection distance can be estimated from the sound duration during search flight.
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Flight characteristics of birds:: I. radar measurements of speeds
Bruno Bruderer,Andreas Boldt +1 more
TL;DR: In this paper, the first part of a study on flight characteristics of birds and presents an annotated list of flight speeds of 139 western Palearctic species, taken with the same tracking radar and corrected for wind influence according to radar-tracked wind-measuring balloons.
Journal ArticleDOI
Echolocation range and wingbeat period match in aerial-hawking bats
TL;DR: It is argued that a species' call frequency is at such a pitch that the resulting detection range matches theirWingbeat period, and small and medium–sized bats in fact matched their maximum detection range for insects and larger flying targets to their wingbeat period.
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