Visual observations of nocturnal species such as owls can be difficult. Knowledge of vocalizations associated with particular behaviours is therefore an extremely useful tool in studying owls in the field. For this purpose, I studied the vocalizations and behaviours of the Great Horned Owl Bubo virginianus, collecting observations on a female human-imprinted individual and wild pairs. Spectrographically, Great Horned Owl calls were divided into three main categories: hoots, chitters, and squawks. These categories were further subdivided into five types of hoots, four types of chitters, and five types of squawks based on inflection, number of syllables, duration, pitch, volume, and behavioural context. Two types of non-vocal communication were also distinguished: hisses and bill clacking. Although owl vocalizations are generally considered innate and variation between individuals should not differ in basic makeup and behavioural context, further verification on wild owls is encouraged.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 97 • No. 4