Poecile atricapillus (Black-capped Chickadee) mobbing calls elicit mobbing events in which birds drive away a predator. Human birders simulate these calls by “pishing” (vocalizing mobbing calls) to coerce birds into view. We investigated whether pishing is as salient as natural mobbing calls, and whether birds respond differently in suburban forest fragments than in intact forests. Using experimental playbacks, we broadcast mobbing calls and pishing calls in suburban forest patches and intact forests and measured Chickadee response. We found that Chickadees had significantly stronger responses to mobbing calls than to alarm calls used as a positive control, but pishing call response was not significantly different than mobbing or control alarm call responses. We also saw no difference in number of Chickadees responding between suburban fragments and intact forests, but we did see a difference in areas with denser vegetation. These findings show that pishing may be less urgent than Chickadee mobbing calls but may still contribute to stress and energetic demands on birds.
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. 26 • No. 3