Percentage of Sites Visited
“Percentage of sites visited” is calculated as the number of FeederWatch sites that reported a species at least once over the winter divided by the total number of FeederWatch sites in the area of interest (see example, below). This value can be from 0 to 100% and is often calculated for specific states or FeederWatch regions.
Example: In this example, only 8 participants are signed up for Project FeederWatch, and they have submitted data about Species A from the following 8 locations.
| Location | FeederWatch count |
| (highest number of Species A seen at one time) | |
| Fairbanks, Alaska | 3 |
| Eugene, Oregon | 5 |
| Salt Lake City, Utah | 2 |
| Edmonton, Alberta | 5 |
| Ames, Iowa | 7 |
| Halifax, Nova Scotia | not reported |
| Bangor, Maine | not reported |
| Winter Park, Florida | not reported |
Percentage of sites visited by Species A = 5 site reports/8 total sites = 63%