Download historical frequencies of bird observations from eBird
ebirdfreq(loctype, loc, startyear = 1900, endyear = format(Sys.Date(),
"%Y"), startmonth = 1, endmonth = 12, long = TRUE, ...)String with location type. Either "states", "counties", or "hotspots".
String with location identifier. If querying states or provinces, the two letter country code followed by the two letter state code and separated by "-" (e.g. "US-NY"). If querying counties, is as in states/provinces, but appending county identifier after a dash. For counties in the US, the county codes is a 3-digit number specific to each state (e.g. Bronx County: "US-NY-005"). For counties in Canada, county codes are two-letter identifiers (e.g. Metro Vancouver: "CA-BC-GV"). If querying hotspots then the unique identifier is a 6-digit number prepended with an "L" (e.g. "L196159"). All these codes can be found by looking at the URL in each respective location/hotspot webpage (which are accessible through the "Explore Data" tab).
Starting year for query. Defaults to 1900.
Ending year for query. Defaults to current year specified by Sys.Date().
Starting month for query as an integer (1-12). Defaults to January.
Ending month for query as an integer (1-12). Defaults to December.
Logical, Should output be in long format? Defaults to TRUE. If FALSE then output will be in wide format.
Curl options passed on to GET
A data frame containing the collected information. If in long format:
"monthQt": month and week (eBird data divides each month by four weeks)
"comName": species common name
"frequency": proportion of times the species was seen in a specified week
"sampleSize" number of complete eBird checklists submitted for specified given week @return If in wide format, then first column is the species list and all other columns are of individual weeks (four in each month). First row contains the number of complete checklists for each week.
# NOT RUN {
ebirdfreq("states", "US-NY", 2014, 2014, 1, 12)
ebirdfreq("counties", "CA-BC-GV", 1900, 2015, 1, 3)
ebirdfreq("hotspots", "L196159", long=FALSE)
# }
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