Population status

Horned Lark
(Eremophila alpestris)

The Horned Lark is best monitored in Canada by the Breeding Bird Survey (BBS), which provides good coverage in the prairies and southern British Columbia but does not cover the arctic or alpine breeding range of this wide-ranging bird. The Horned Lark is also monitored by the Christmas Bird Count, which covers the species' winter range in the United States, where most of the species breeds and winters, but includes birds from the Canadian arctic. The results from both surveys indicate a long-term, continuous decrease in numbers since 1970. However, because the entire population is not well covered in Canada the reliability of this assessment is considered medium. At the regional level, all Bird Conservation Regions for which there are reasonably reliable BBS results also show a large decrease in population over the same time period. The Horned Lark population, which includes all subspecies except the strigata subspecies, are below the lowest acceptable levels relative to their national population goals. The national goal is based on BBS results (see Canada graph below). The strigata goal, outlined in the Recovery Strategy, is to establish and maintain a breeding population of at least 10 breeding pairs, distributed across a minimum of three sites, within the historical Canadian breeding range (ECCC 2016).

 

Population goal and acceptable levels of variation

Species/groupGoalLower levelUpper level
Horned LarkMean abundance (first 5 years of survey)Goal minus 25% Not applicable
Horned Lark strigata subspeciesLong-term recovery goal (SARA)Equal to goalNot 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 analysis1970-2016-4.8-5.4-4.2
Canada Select to view graph of the geographic area: Canada 2006-2016; Breeding Bird Survey (BBS) - Canadian analysis2006-2016-7.2-9.1-5.1
Boreal Taiga Plains Select to view graph of the geographic area: Boreal Taiga Plains 1970-2016; Breeding Bird Survey (BBS) - Canadian analysis1970-2016-9-10.7-7.2
Prairie Potholes Select to view graph of the geographic area: Prairie Potholes 1970-2016; Breeding Bird Survey (BBS) - Canadian analysis1970-2016-4.7-5.3-4
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 analysis1970-2016-3.8-4.6-3
Atlantic Northern Forest Select to view graph of the geographic area: Atlantic Northern Forest 1970-2016; Breeding Bird Survey (BBS) - Canadian analysis1970-2016-11.1-13.4-8.8
North America Select to view graph of the geographic area: North America 1970-2016; Breeding Bird Survey (BBS) - Canadian analysis1970-2016-2.3-2.6-2.1
 

Picture of logo Christmas Bird Count (CBC)

Additional information on: Christmas Bird Count (CBC)

Table 2: Population trends by geographic area
Geographic areaTime PeriodAnnual Trend Table 2 - footnote 1 Limits
LowerUpper
North America Select to view graph of the geographic area: North America 1970-2016; Christmas Bird Count (CBC)1970-2016-1.9-3.6-0.291
 

References