function label_summary(folder::String, avianz = true)

# if specified folder must include trailing /
function label_summary(folder::String = "", avianz = true)

        files = Glob.glob("$folder/*.['W','w']['A','a']['V','v'].data")

        files = Glob.glob("$(folder)*.['W','w']['A','a']['V','v'].data")

        CSV.write("$folder/label_summary_avianz-$(Dates.today()).csv", df, delim = '\t')

        CSV.write("$(folder)label_summary_avianz-$(Dates.today()).csv", df, delim = '\t')

        CSV.write("$folder/label_summary_raven-$(Dates.today()).csv", df, delim = '\t')

        CSV.write("$(folder)label_summary_raven-$(Dates.today()).csv", df, delim = '\t')