Dot Distribution - FeederWatch participants

http://www.birds.cornell.edu/pfw_fr/Members/ParticipantMap00.htm

Dot distribution maps are an easy way to depict density of whatever variable is being plotted.  The visual clustering of dots shows a high density of the variable occurring while large spacing inbetween the dots shows low density values.  The map above shows the distribution of people that participated in the FeederWatch program for the 2000-2001 migratory season.  Each dot represents someone who was actively watching birds during this time frame and reported all of the data they found to the FeederWatch organization.  From this map it is obvious that there is a much higher amount of people participating in the program in the Northeast portion of the U.S. and Southeast Canada as compared to that of the West and South portions of the U.S.