2.5. Data analyses
For the purposes of data analyses and because these observations
were not independent, I determined the maximum number
of total birds observed using the facility between the two 15-min
surveys conducted at each facility on each observation day to provide
one survey per facility for each observation day. In addition,
in order to consider only birds actually associated with (e.g., using)
the transfer station and reference site buildings, birds with the ‘pass
flying’, ‘locally flying’, ‘loafing on the ground’, and ‘feeding on the
ground’ activity codes we