LC
Lark Bunting Calamospiza melanocorys



Taxonomy

Taxonomic note
Plumage dichromatism and elaborate aerial displays reminiscent of Chestnut-collared Longspur (Calcarius ornatus) and Thick-billed Longspur (Rhynchophanes mccownii), but not closely related. Monotypic.

Taxonomic source(s)
Handbook of the Birds of the World and BirdLife International. 2021. Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 6. Available at: http://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v6_Dec21.zip.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2021 Least Concern
2018 Least Concern
2016 Least Concern
2012 Least Concern
2009 Least Concern
2008 Least Concern
2004 Least Concern
2000 Lower Risk/Least Concern
1994 Lower Risk/Least Concern
1988 Lower Risk/Least Concern
Species attributes

Migratory status full migrant Forest dependency Does not normally occur in forest
Land mass type Average mass 38 g
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 2,010,000 medium
Extent of Occurrence non-breeding (km2) 2,520,000 medium
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 12000000 poor estimated 2019
Population trend Decreasing suspected -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations - - -
Percentage in largest subpopulation - - -

Population justification: The global population is estimated to number 12,000,000 mature individuals (Partners in Flight 2019).

Trend justification: The species has been undergoing a large decline at an average rate of 3.1% per year between 1970 and 2017 (Partners in Flight 2019). Short-term trends however suggest that the decline has slowed down considerably in recent years and that the population has been stable or even increasing since 2010 (Pardieck et al. 2018). Given the uncertainty surrounding the trend estimate, the species is tentatively considered to be in decline, but the rate of decline is not considered to approach the threshold for Vulnerable over the relevant three generation time periods for this assessment.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Canada N Extant Yes
Mexico N Extant Yes
USA N Extant Yes Yes Yes Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Canada Bigstick Lake Plain

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Arable Land suitable non-breeding
Grassland Temperate major breeding
Grassland Temperate major non-breeding
Shrubland Temperate suitable non-breeding
Shrubland Temperate suitable breeding
Altitude   Occasional altitudinal limits  

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Pets/display animals, horticulture - - International Non-trivial Recent

Recommended citation
BirdLife International (2022) Species factsheet: Calamospiza melanocorys. Downloaded from http://www.birdlife.org on 26/06/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 26/06/2022.