An urban bird population exhibits more fear in the non-breeding season
收藏资源简介：
Fear response in birds is affected by environmental factors, many of which are related to seasonality, such as temperature or resource availability. The evolutionarily novel conditions of the urban environment may alter avian seasonal behaviours. We ask whether fear response behaviour in urban birds is associated with the differing constraints of the breeding and non-breeding seasons. To examine this, we measured the escape behaviour of an urban, resident population of Dark-eyed Juncos (Junco hyemalis). We quantified escape behaviour from 2023-2025 by measuring the flight initiation distance (FID) of individually color-banded juncos and compared junco FID throughout the year. We found that junco FID was significantly reduced during the breeding season. Other significant predictors of FID in our model were observer starting distance and group size. Our results suggest that while seasonality plays a major role in determining urban speciesâ behavioural responses, other factors make this re..., , # Data from: An urban bird population exhibits more fear in the non-breeding season Dataset DOI: [10.5061/dryad.905qftv10](https://doi.org/10.5061/dryad.905qftv10) ## Description of the data and file structure ### Files and variables #### File: Seasonal_Fear_Code_Dryad.Rmd **Description:**Â The markdown file shows the code with some explanations of the processes behind the code and statistical analysis. #### File: Seasonal_Fear_Data_Jan29.csv **Description:**Â The data used in the analysis. ##### Variables Sex = sex of bird (male, female, or unknown if assayed during first summer of life). USGS = the unique United States Geological Survey bird band number that was affixed to each bird's leg. Age = age of bird. Hatch year (HY, first year of life), second year (SY, second year of life), after second year (ASY, after second year of life). Juncos are visually distinguishable until after their second year of life. Observer = There were two observers conducting FID assays. Observer ..., ,
