mspecies = total number of individuals counted in May of current year

mindiv = total number of individuals counted in May of current year

mcumind = cumulative individuals counted in May from start to date

mcumspp = cumulative species counted in May from start to date

mobservers = number of observers in May count for current year

mwlktime = total amount of time observerse spent walking in May count for current year

mdrvtime = total amount of time observers spent driving in May count for current year

mtottime = sum of mwlktime and mdrvtime

mdaytemp = average temperature for day of May (C)

sumppt = total precipitation (mm) in June, July and August of current year (to see effect on counts, use data for previous year)

wintemp = average temperature (C) in December, January and February of current year (to see effect on counts, use data for previous year)

aprtemp = average temperature for April of the current year (to see effect on counts, use data for current year)

aprppt = total precipitation (mm) for April of the current year (to see effect on counts, use data for current year)

(For x- variables, see code for corresponding m- variable.)