Graves_et_al_data2 (has geographical regions but no observer names or secondary substrates)

Data file contains headers and 1964 other rows (total of 1965 rows). Missing values are indicated by NULL. Variable names: descriptions. Region: Text name for geographical regions of the state corresponding to Figure 2(c) in Graves et al. (2013). observation_date: month/day/year for original observation.
location_name: text name given to the location in the Tricolored Blackbird Portal (http://tricolor.ice.ucdavis.edu). bird_count: integer for the total number of birds reported. primary_substrate: text name the breeding substrate listed in the record as either the dominant kind of vegetation or the first listed kind. NULL indicates no data were available. Colony: yes or no for whether the record comes from a breeding colony or not. NULL indicates it was not clear and the data were therefore omitted from breeding colony analyses.