Canadian Migration Monitoring Network
Open
2006
CMMN was launched in 1998 as an ongoing monitoring program. The first migration monitoring station in North America was LPBO, started in 1960. Tatlayoko Lake Bird Observatory began opperations in 2006 and joined CMMN in 2014.
This dataset contains daily estimated totals (DET) from the Tatlayoko Lake Bird Observatory. DET is a standard protocol used by Canadian Migration Monitoring Network stations to estimate the total number of individuals of each species occurring at a site during migration.
Fall Monitoring occurs in August and September.
Williams Lake, British Columbia (51.653331, -124.404565)
Primary focus is landbirds (104 priority species) with some Northern Saw-whet Owl banding.
To generate counts of migrating birds for use in long-term population monitoring, especially landbird species not monitored by current breeding or winter surveys; To carry out cooperative research projects on the ecology of migrating birds. The Goal of Tatlayoko Lake Bird Banding Station is to monitor the health of migratory birds moving through NCC properties.
Standardized captures and observations used to derive daily estimated total throughout migration window.
Combination of standardized daily captures, census, visible migration counts and other observations resulting in a daily estimated total for each species. Monitoring period is 6 hours in length and census is 1.25hours. The station runs 12 standard mistnets, 3 non-standard nets and 3 hawk nets.
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 alert had been recorded. Note that the portion of count area covered during incidental observations was expanded in 2017, causing noticeable increase in Estimated Totals for certain species, especially grassland birds. As well, regeneration and succession has altered capture rates for some nets.
Birds Canada and Tatlayoko Lake Bird Observatory. 2025. "CMMN Daily Estimated Totals: Tatlayoko Lake Bird Observatory". Data accessed from NatureCounts, Birds Canada. 10.71842/fj3w-e548
