RCSM - totaux quotidiens estimés: Long Point Bird Observatory

Méthodologie

Combination of standardized daily captures, census, visible migration counts and other observations resulting in a daily estimated total for each species. Count period is during daylight hours, with a 1 hour census.

Most stations produce some form of annual report for members.

Any disruption to standardized operations relevant to appropriate interpretation of analytical results is noted in a regularly-updated section of the station protocol. As of 2025, the following alerts have been recorded. Population trends for years prior to 1983 are based on data from only two of the three stations on Long Point. As well, the Tip station is subject to long-term changes in land-form and vegetation due to flooding and erosion as Lake Erie water levels fluctuate. Daily Estimated Totals were designed from the outset to collect consistent data on number of birds present daily at the eastern end of the Point, and this goal has been maintained to the extent feasible; e.g., the census route configuration has remained similar despite a major westward shift of banding operations (about 250m) that became necessary in 2020. Nonetheless, it should be noted that several types of permanent traps (Heligoland, J-traps) have been built then lost to waves over the decades that likely affected counts of some species in some years. Pandemic restrictions in 2020-2021 caused the Breakwater station to be closed. Participant numbers were reduced at the Tip for both years, and at Old Cut only in spring of 2020.