The data are maintained by the USGS (https://www.pwrc.usgs.gov/bbs/RawData/) and provide information on the trends and status of North American bird populations reported as population abundance indices. This research effort analyzed Louisiana breeding bird survey data (total species and total population) for 1990 and 2014. This dataset is not publicly accessible because: It is secondary data maintained by USGS. It can be accessed through the following means: https://www.pwrc.usgs.gov/bbs/RawData/. Format: Electronic text files. This dataset is associated with the following publication: Eason, T., W. Chuang, S. Sundstrom, and H. Cabezas. An information theory-based approach to assessing spatial patterns in complex systems. Entropy. MDPI AG, Basel, SWITZERLAND, 21(2): 182, (2019).