All sightings and good survey effort for each month displayed on an individual map, with years plotted in different colors.

Click on the thumbnail to view the full sized image, or get the printable full map series version (pdf, 15mb).

January   February
1978-1999 2000-2003 1978-1999 2000-2003
 
March April
1978-1999 2000-2003 1978-1999 2000-2003
 
May June
1978-1999 2000-2003 1978-1999 2000-2003
 
July August
1978-1999 2000-2003 1978-1999 2000-2003
 
September October
1978-1999 2000-2003 1978-1999 2000-2003
 
November   December
1978-1999 2000-2003 1978-1999 2000-2003