Page 1/22 Not all cities are the same: variation in animal phenotypes across cities within urban ecology studies Javier delBarco-Trillo (  delbarcotrillo@gmail.com ) Nottingham Trent University Breanna J. Putman California State University Research Article Keywords: human population density, meta-analysis, multiple cities, phenotypic changes, urban ecology, urbanization. Posted Date: October 12th, 2022 DOI: https://doi.org/10.21203/rs.3.rs-1699417/v1 License:   This work is licensed under a Creative Commons Attribution 4.0 International License. Read Full License Additional Declarations: No competing interests reported. Version of Record: A version of this preprint was published at Urban Ecosystems on August 9th, 2023. See the published version at https://doi.org/10.1007/s11252-023-01419-8.