Population status

Great Crested Flycatcher
(Myiarchus crinitus)

The Great Crested Flycatcher is well monitored by the Breeding Bird Survey (BBS), which covers most of the species' breeding population in Canada. BBS results indicate that the national population has decreased by about 31% since 1970, though that decrease appears to have tapered off over the most recent period (2006-2012). The Great Crested Flycatcher is currently below the lowest acceptable level relative to its national population goal (see BBS Canada graph below). However, the majority of the Great Crested Flycatcher's North American breeding population resides within the United States; BBS results indicate that the continental population has shown little overall change during the same time period.

 

Population goal and acceptable levels of variation

Species/groupGoalLower levelUpper level
Great Crested FlycatcherMean 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 analysis1970-2016-0.8-1.3-0.4
Canada Select to view graph of the geographic area: Canada 2006-2016; Breeding Bird Survey (BBS) - Canadian analysis2006-2016-0.2-1.61.2
Boreal Taiga Plains Select to view graph of the geographic area: Boreal Taiga Plains 1970-2016; Breeding Bird Survey (BBS) - Canadian analysis1970-2016-0.8-2.30.6
Prairie Potholes Select to view graph of the geographic area: Prairie Potholes 1970-2016; Breeding Bird Survey (BBS) - Canadian analysis1970-2016-1-2.10.2
Boreal Hardwood Transition1970-2016-1.1-1.8-0.4
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 analysis1970-2016-0.4-0.90.1
Atlantic Northern Forest Select to view graph of the geographic area: Atlantic Northern Forest 1970-2016; Breeding Bird Survey (BBS) - Canadian analysis1970-2016-0.3-1.71.1
North America Select to view graph of the geographic area: North America 1970-2016; Breeding Bird Survey (BBS) - Canadian analysis1970-20160-0.10.1
 

References