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Canadian results from both the Christmas Bird Count (CBC), and the Breeding Bird Survey (BBS) provide information on the population status of the Ruby-crowned Kinglet. Although the CBC results include birds breeding in the United States, the survey covers approximately 75% of the winter range in North America, and is dominated by birds breeding in Canada, which make up more than 80% of the continental population. The BBS provides information directly on the population breeding in Canada, and has a more standardized survey design, but covers less than one-third of the breeding population, mainly in the southern portion. BBS results are therefore considered a supplement to the CBC. The North American results from the CBC suggest the continental wintering population of this species has shown little overall change in abundance since the early 1970s. Over the same time period, BBS results show a small positive trend in the Canadian population, but the magnitude is classified as being within the "little overall change" category. Regional BBS trends vary from large decreases to large increases amongst the Bird Conservation Regions (BCR) that host the species (results for all BCRs with reasonably reliable results are displayed below). Considering both sources, the abundance of the Ruby-crowned Kinglet in Canada is assessed as having changed little since the early 1970s. The species is at an acceptable level relative to its national population goal (see CBC North America graph below).
Additional information on: Christmas Bird Count (CBC)
Additional information on: Breeding Bird Survey (BBS) - Canadian analysis
