Hi Tim & All,
I just noticed something in the Crotty paper that might explain the problem:
"All eBird checklists submitted in a five-county region surrounding each
historical observation location were included in the analysis to establish a
sufficient sample size to assess temporal occupancy patterns."
A five-county region around Coos would be, I suppose, Coos, Curry, Josephine,
Douglas ... and then take your pick for the last one. Jackson, Lane, or Del
Norte?
Including Douglas County, Lane County, and/or a couple of inland counties could
make a big difference in the outcome.
Joel
Tim Rodenkirk wrote:
... I have attached an excel spreadsheet with the first arrival date info I
have for Rufous Hummers in Coos. Based on these data ... the average arrival
date is 10
February for the period 2006-2015 that the Crotty article analyzed. The chart
in the Crotty article shows the average arrival date for the period of
2006-2015 in Coos Bay as day 70.9 which equals 12 March. This is a month
different from the observation data I have!
