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“Shortest-distance” method is more accurate than conventional method in estimating flight initiation distances for close, perched birds

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Abstract

The conventional method to determine avian flight initiation distance (the distance at which birds exposed to an approaching human activity initiate escape behavior) overestimates this distance for perched birds because it uses the distance between the bird and the ground at the person’s feet rather than the distance between the bird and the part of the person’s body closest to the bird. Here, we introduce an alternative “shortest-distance” method that more accurately estimates flight initiation distance, especially for close, perched birds.

Zusammenfassung

Die Methode der „kürzesten Strecke“ ist genauer als die konventionelle Methode zur Abschätzung von Fluchtdistanzen in der Nähe sitzender Vögel

Die konventionelle Methode, die Fluchtdistanz von Vögeln zu bestimmen, d. h. den Abstand zu ermitteln, bei dem bei Vögeln, die mit einer sich nähernden menschlichen Aktivität konfrontiert werden, Fluchtverhalten ausgelöst wird, überschätzt diese Entfernung für sitzende Vögel. Sie misst nämlich eher die Strecke zwischen dem Vogel und dem Boden zu Füßen der Person zugrunde legt als den Abstand zwischen dem Vogel und dem diesem am nächsten befindlichen Körperteil der Person. Hier stellen wir eine alternative Methode der „kürzesten Strecke“vor, welche genauere Schätzungen für die Fluchtdistanz liefert, speziell bei in der Nähe sitzenden Vögeln.

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Correspondence to Kent B. Livezey.

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Communicated by A. Hedenström.

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Livezey, K.B., Blumstein, D.T. “Shortest-distance” method is more accurate than conventional method in estimating flight initiation distances for close, perched birds. J Ornithol 157, 923–925 (2016). https://doi.org/10.1007/s10336-016-1337-3

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  • DOI: https://doi.org/10.1007/s10336-016-1337-3

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