Population status

Eastern Wood-Pewee
(Contopus virens)

The most reliable data for the Eastern Wood-Pewee in Canada are from the Breeding Bird Survey (BBS), which provides excellent coverage of the breeding population. BBS results indicates a large, consistent decrease since about 1970, with a ~71% loss of abundance. This decrease is seen across the species' Canadian range and continues through the most recent decade. The majority of the species' North American range is in the United States, where BBS data also show a persistent, long-term decrease in the continental population, though at a slightly smaller magnitude than in Canada. The long-term population goal is based on the BBS; the Eastern Wood-Pewee is below the lowest acceptable level relative to its national population goal (see Canada graph below). Once the Management Plan is developed under the Species at Risk Act, this goal will be re-examined.

 

Population goal and acceptable levels of variation

Species/groupGoalLower levelUpper level
Eastern Wood-PeweeMean abundance (first 5 years of survey)Goal minus 25% Not applicable

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 Limits
LowerUpper
Canada Select to view graph of the geographic area: Canada 1970-2016; Breeding Bird Survey (BBS) - Canadian analysis1970-2016-2.6-3-2.3
Canada Select to view graph of the geographic area: Canada 2006-2016; Breeding Bird Survey (BBS) - Canadian analysis2006-2016-2.5-3.5-1.6
Boreal Taiga Plains Select to view graph of the geographic area: Boreal Taiga Plains 1970-2016; Breeding Bird Survey (BBS) - Canadian analysis1970-2016-2.4-4.3-0.3
Boreal Softwood Shield Select to view graph of the geographic area: Boreal Softwood Shield 1977-2016; Breeding Bird Survey (BBS) - Canadian analysis1977-2016-5.3-7.8-2.9
Prairie Potholes Select to view graph of the geographic area: Prairie Potholes 1970-2016; Breeding Bird Survey (BBS) - Canadian analysis1970-2016-1.2-2.70.3
Boreal Hardwood Transition Select to view graph of the geographic area: Boreal Hardwood Transition 1970-2016; Breeding Bird Survey (BBS) - Canadian analysis1970-2016-3-3.8-2.3
Lower Great Lakes / St. Lawrence Plain Select to view graph of the geographic area: Lower Great Lakes / St. Lawrence Plain 1970-2016; Breeding Bird Survey (BBS) - Canadian analysis1970-2016-2.2-2.6-1.8
Atlantic Northern Forest Select to view graph of the geographic area: Atlantic Northern Forest 1970-2016; Breeding Bird Survey (BBS) - Canadian analysis1970-2016-2.8-3.5-2.2
North America Select to view graph of the geographic area: North America 1970-2016; Breeding Bird Survey (BBS) - Canadian analysis1970-2016-1.4-1.5-1.2
 

References