About seasonal abundance

Seasonal abundance graphs are plots of the daily mean log(count) across years sampled at a location (e.g., Canadian Migration Monitoring Network station).

Options are available to display a LOESS smoothed line of the percent of years the selected species was present each day of year, and the raw percent of years the station was in operation during each day of year (i.e., station coverage).

Migration windows show the boundaries of the spring and fall migration window, and are shown only if the species was analyzed during a particular season. The bounds of spring and fall migration windows were restricted to those days of the year when the station operated during at least 50% of total years in operation.

Delta Marsh Bird Observatory - Northern Waterthrush
• daily mean log(species count)
— Percent of years species present each day
— Percent of years station in operation each day
| Spring and/or fall migration window boundaries