Population status

Black-throated Blue Warbler
(Setophaga caerulescens)

Populations of the Black-throated Blue Warbler are well monitored by the Breeding Bird Survey (BBS) which provides good coverage of the breeding population in Canada. Populations have shown a large, consistent increase since about 1970. This increase is seen throughout the species' range in Canada (all Bird Conservation Regions with reliable/adequate results are shown below).

 

Breeding Bird Survey (BBS) - Canadian analysis

Additional information on: Breeding Bird Survey (BBS) - Canadian analysis

Table 1: Population trends by geographic area
Geographic areaTime Period Table 1 - footnote 1 Annual trend Table 1 - footnote 2 Intervals Table 1 - footnote3
LowerUpper
Canada Select to view graph of the geographic area: Canada 1970-2012; Breeding Bird Survey (BBS) - Canadian analysis1970-20123.124.4
Boreal Hardwood Transition Select to view graph of the geographic area: Boreal Hardwood Transition 1970-2012; Breeding Bird Survey (BBS) - Canadian analysis1970-20122.11.13.1
Lower Great Lakes / St. Lawrence Plain Select to view graph of the geographic area: Lower Great Lakes / St. Lawrence Plain 1970-2012; Breeding Bird Survey (BBS) - Canadian analysis1970-20123.11.44.9
Atlantic Northern Forest Select to view graph of the geographic area: Atlantic Northern Forest 1970-2012; Breeding Bird Survey (BBS) - Canadian analysis1970-20123.11.94.2
Canada Select to view graph of the geographic area: Canada 2002-2012; Breeding Bird Survey (BBS) - Canadian analysis2002-20124.41.57.7
 

References