Here, we present a summary of the data submitted each year by the sites in our network. The full data sets are archived by members of MMANA and by the site coordinators. The charts shown here will be updated at the end of the fall censuses each year (mid-November).

 

Data Summary - All Sites

Below is a chart comparing the annual monarch census results from all sites during years where all three were operated. Each data point represents the percentage above or below the overall average number of monarchs per census (21.3 for Cape May, 30.7 for Peninsula Pt) or per hour (98.1 for Chincoteague).

(Click this graph to view a larger version)

 

The table below shows the same data as the chart above - the percentage above or below the mean for the site (21.3 monarchs/census for Cape May, 30.7 monarchs/census for Peninsula Pt, 98.1 monarchs/hour for Chincoteague) each year.

Year
Peninsula Pt
Cape May
Chincoteague
1992
No census
-83
No census
1993
No census
-4
No census
1994
No census
31
No census
1995
No census
-63
No census
1996
-65
-12
No census
1997
67
61
-39
1998
-81
-33
-56
1999
-6
357
144
2000
2
-57
-27
2001
57
10
65
2002
-26
-55
-73
2003
56
-32
-2
2004
-68
-87
-66
2005
37
-5
26

 

Data Summary - Peninsula Point, MI

Latest season's data (2005):

Average daily census numbers for 2005 at Peninsula Point, MI. Each point in the chart represents the average of three daily walking censuses.

 

Overall trend chart:

Average annual numbers Peninsula Point, MI. Each point in the chart represents the season average of all censuses. Red dotted line shows the 10-year average for this site (30.7 monarchs/census).

 

 

Data Summary - Cape May Bird Observatory, NJ

Latest season's data (2005):

Average daily census numbers for 2005 at Cape May, NJ. Each point in the chart represents the average of three daily driving censuses.

 

Overall trend chart:

Average annual numbers Cape May, NJ. Each point in the chart represents the season average of all censuses. Red dotted line shows the 15-year average for this site (21.3 monarchs/census).

* 1991 was a pilot year for this site

 

 

Data Summary - Chincoteague, VA

Latest season's data (2005):

Average daily census numbers for 2005 at Chincoteague, VA. NOTE - This census data is in units of monarchs/hour. Each point in the chart represents the average of three daily driving censuses.

 

Overall trend chart:

Average annual numbers of monarchs at Chincoteague, VA. Each point in the chart represents the season average of all censuses. NOTE - This census data is in units of monarchs/hour. Red dotted line shows the 9-year average for this site (98.1 monarchs/hour).