Altitudinal/elevational migration
Value: 1: Yes
Source: Sekercioglu et al. 2025
Value: Andes of s South America; pampas of s Brazil to s Argentina
Source: Clements 2021
Value: Temperate South America from Peru on the west and Uruguay on the east to Tierra del Fuego.
Source: Peter's Checklist of the Birds of the World
Value: Andes of southern South America; pampas of southern Brazil to southern Argentina
Source: Avilist 2025
Value: Andes of southern South America; pampas of southern Brazil to southern Argentina
Source: Clements, version 2024
Maximum latitude of breeding range
Value: -1.96
Units: degrees
Source: Tobias et al. 2021
Minimum latitude of breeding range
Value: -54.65
Units: degrees
Source: Tobias et al. 2021
Value: -33.05
Units: degrees
Source: Tobias et al. 2021
Value: -33.05
Units: degrees
Source: Bird et al. 2020
Value: -67.5
Units: degrees
Source: Tobias et al. 2021
Nomadic, erratic, irruptive, wandering
Value: 1: Yes
Source: Sekercioglu et al. 2025
Breeding restricted to island(s)
Value: 0
Source: Sekercioglu et al. 2025
Value: Tropical-Temperate
Source: Sekercioglu et al. 2025
Value: 1: Yes
Source: Sekercioglu et al. 2025
Value: Sedentary
Source: Tobias et al. 2021
Value: Full Migrant
Source: Bird et al. 2020
Value: 8460000
Units: km2
Source: Bird et al. 2020
Value: 3269778.02
Units: km2
Source: Tobias et al. 2021
Value: > 50000
Units: km2
Source: Sekercioglu et al. 2025
Value: Neotropical
Source: Sekercioglu et al. 2025
Value: Neotropic
Source: Pigot et al. 2020
Range and population size
Value: N
Source: Birdlife's Worldbird Database
Value:
Range: 0 - 4500
Units: m
Source: Bird et al. 2020
Value:
Range: - 4500
Units: m
Source: Birdlife's Worldbird Database
Value:
Range: 0 - 4500
Units: m
Source: Sekercioglu et al. 2025
Value: 4500
Units: m
Source: Sekercioglu et al. 2025
Number of major habitats used
Value: 3
Source: Sekercioglu et al. 2025
Value: Open habitats
Source: Tobias et al. 2021
Value: Wetland
Source: Tobias et al. 2021
Value: Freshwater
Source: Bird et al. 2020
Value: Marine
Source: Bird et al. 2020
Value: DIURNAL
Source: Bird et al. 2020
Value: C: Sea coast, mangrove, estuary, bays, shores, fjords (only sea coast), coastal dune
Units: rank
Source: Sekercioglu et al. 2025
Value: W: Wetlands, lakes, salt lakes, marsh, reedbed
Units: rank
Source: Sekercioglu et al. 2025
Value: R: Rocky areas, cliffs, outcrop, inselberg, koppi, escarpment
Units: rank
Source: Sekercioglu et al. 2025
Number of major food types consumed
Value: 1
Source: Sekercioglu et al. 2025
Source used for diet data
Value: 1
Source: Sekercioglu et al. 2025
Value: Invertebrate
Source: Sekercioglu et al. 2025
Value: Invertebrate
Source: Bird et al. 2020
Ecological Specialization Index
Value: 1.52288
Source: Sekercioglu et al. 2025
Value: Aquatic ground
Source: Pigot et al. 2020
Value: Carnivore
Source: Pigot et al. 2020
Value: Carnivore
Source: Tobias et al. 2021
Value: Aquatic predator
Source: Pigot et al. 2020
Value: Aquatic predator
Source: Tobias et al. 2021
Value: 0
Source: Sekercioglu et al. 2025
Value: 0
Source: Sekercioglu et al. 2025
Weight of invertebrates in diet
Value: 10
Source: Sekercioglu et al. 2025
Weight of land vertebrates in diet
Value: 0
Source: Sekercioglu et al. 2025
Weight of miscellaneous in diet
Value: 0
Source: Sekercioglu et al. 2025
Value: 0
Source: Sekercioglu et al. 2025
Weight of plant material in diet
Value: 0
Source: Sekercioglu et al. 2025
Weight of scavenging in diet
Value: 0
Source: Sekercioglu et al. 2025
Value: 0
Source: Sekercioglu et al. 2025
Sum of the weighted diets
Value: 10
Source: Sekercioglu et al. 2025
Value: 3.4
Range: 3.4 - 3.4
Units: cm
Sample: 1
Source: Tobias et al. 2021
Value: 3.54
Range: 3.34 - 3.93
Units: cm
Sample: 3
Source: Tobias et al. 2021
Value: 3.505
Range: 3.34 - 3.93
Units: cm
Sample: 4
Source: Tobias et al. 2021
Bill length (females) - Culmen
Value: 10.92
Range: 10.92 - 10.92
Units: cm
Sample: 1
Source: Tobias et al. 2021
Bill length (males) - Culmen
Value: 10.55
Range: 10.21 - 10.83
Units: cm
Sample: 3
Source: Tobias et al. 2021
Bill length (females) - Nares to tip
Value: 8.19
Range: 8.19 - 8.19
Units: cm
Sample: 1
Source: Tobias et al. 2021
Bill length (males) - Nares to tip
Value: 7.81667
Range: 7.72 - 8
Units: cm
Sample: 3
Source: Tobias et al. 2021
Bill length (sex unknown) - Nares to tip
Value: 7.91
Range: 7.72 - 8.19
Units: cm
Sample: 4
Source: Tobias et al. 2021
Bill length (sex unknown) - Culmen
Value: 10.6425
Range: 10.21 - 10.92
Units: cm
Sample: 4
Source: Tobias et al. 2021
Value: 2.37
Range: 2.37 - 2.37
Units: cm
Sample: 1
Source: Tobias et al. 2021
Value: 2.46667
Range: 2.41 - 2.55
Units: cm
Sample: 3
Source: Tobias et al. 2021
Value: 2.4425
Range: 2.37 - 2.55
Units: cm
Sample: 4
Source: Tobias et al. 2021
Value: 2615
Range: 2277 - 3570
Units: g
Source: Myhrvold et al. 2015
Value: 2277
Units: g
Source: Tobias et al. 2021
Value: 2277
Units: grams
Source: Bird et al. 2020
Value: 2460
Units: g
Source: Sekercioglu et al. 2025
Value: 2530
Range: 2525 - 2665
Units: g
Source: Myhrvold et al. 2015
Value: 85
Range: 85 - 85
Units: g
Source: Myhrvold et al. 2015
Value: 3574.5
Range: 3516.5 - 3579
Units: g
Source: Myhrvold et al. 2015
Value: 2495
Range: 2277 - 3052
Units: g
Source: Myhrvold et al. 2015
Value:
Range: 1720 - 3200
Units: g
Source: Sekercioglu et al. 2025
Value: 11.3
Range: 11.3 - 11.3
Units: cm
Sample: 1
Source: Tobias et al. 2021
Value: 14.4333
Range: 13.3 - 15.2
Units: cm
Sample: 3
Source: Tobias et al. 2021
Tail length (sex unknown)
Value: 13.65
Range: 11.3 - 15.2
Units: cm
Sample: 4
Source: Tobias et al. 2021
Value: 22.2
Range: 22.2 - 22.2
Units: cm
Sample: 1
Source: Tobias et al. 2021
Value: 25.2667
Range: 24.3 - 26
Units: cm
Sample: 3
Source: Tobias et al. 2021
Tarsus length (sex unknown)
Value: 24.5
Range: 22.2 - 26
Units: cm
Sample: 4
Source: Tobias et al. 2021
Value: 37.3
Range: 37.3 - 37.3
Units: cm
Sample: 1
Source: Tobias et al. 2021
Hand-Wing Index (females)
Value: 211
Range: 211 - 211
Units: %
Sample: 1
Source: Tobias et al. 2021
Value: 232
Range: 226 - 238
Units: %
Sample: 3
Source: Tobias et al. 2021
Hand-Wing Index (unknown)
Value: 226.75
Range: 211 - 238
Units: %
Sample: 4
Source: Tobias et al. 2021
Value: 16.2
Range: 16.2 - 16.2
Units: cm
Sample: 1
Source: Tobias et al. 2021
Value: 17.9333
Range: 17.7 - 18.2
Units: cm
Sample: 3
Source: Tobias et al. 2021
Value: 17.5
Range: 16.2 - 18.2
Units: cm
Sample: 4
Source: Tobias et al. 2021
Value: 41.1333
Range: 40.3 - 41.7
Units: cm
Sample: 3
Source: Tobias et al. 2021
Wing length (females) - secondary1
Value: 21.1
Range: 21.1 - 21.1
Units: cm
Sample: 1
Source: Tobias et al. 2021
Wing length (males) - secondary1
Value: 23.2
Range: 22.6 - 23.8
Units: cm
Sample: 3
Source: Tobias et al. 2021
Wing length (unknown) - secondary1
Value: 22.675
Range: 21.1 - 23.8
Units: cm
Sample: 4
Source: Tobias et al. 2021
Wing length (sex unknown)
Value: 40.175
Range: 37.3 - 41.7
Units: cm
Sample: 4
Source: Tobias et al. 2021
Description of physical nest (shape, etc.)
Value: cup, bowl
Source: Sekercioglu et al. 2025
Value: 142
Range: 142 - 142.7
Units: g
Source: Myhrvold et al. 2015
Value: 3.325928734
Units: years
Source: Bird et al. 2020
Value: 3
Units: years
Source: Bird et al. 2020
Age at first breeding (females)
Value: 5
Range: 2.5 - 6
Units: years
Source: Myhrvold et al. 2015
Age at first breeding (males)
Value: 5.5
Range: 5 - 6
Units: years
Source: Myhrvold et al. 2015
Value: 1
Range: 1 - 2
Units: n
Source: Myhrvold et al. 2015
Value:
Range: 1 - 1
Source: Sekercioglu et al. 2025
Value: 1
Units: n
Source: Bird et al. 2020
Value: 1: Yes
Source: Sekercioglu et al. 2025
Value:
Range: 70 - 80
Source: Sekercioglu et al. 2025
Value: 68.5
Range: 65 - 72.5
Units: days
Source: Myhrvold et al. 2015
Number of breeding attempts per year
Value: 1.5
Range: 1.5 - 1.5
Units: n/year
Source: Myhrvold et al. 2015
Sex of bird sitting on eggs/nest
Value: Both
Source: Sekercioglu et al. 2025
Value:
Range: 27 - 31
Source: Sekercioglu et al. 2025
Value: 29.75
Range: 28 - 32
Units: days
Source: Myhrvold et al. 2015
Interval between breeding attempts
Value: 0.75
Range: 0.5 - 1
Units: years
Source: Myhrvold et al. 2015
Value: 0: No
Source: Sekercioglu et al. 2025
How nests are connected to supporting objects
Value: Basal
Source: Chia et al. 2023
Location where nests are constructed
Value: Ground; Cliff_Bank; Waterbody
Source: Chia et al. 2023
Value: Ground
Source: Sekercioglu et al. 2025
Nest has an 'artificial' location
Value: no
Source: Sheard et al. 2024
Nest has an 'earth hole' location
Value: no
Source: Sheard et al. 2024
Nest has a 'ground' location
Value: yes
Source: Sheard et al. 2024
Nest has a 'rock' location
Value: no
Source: Sheard et al. 2024
Nest has a 'tree hole' location
Value: no
Source: Sheard et al. 2024
Nest has a 'vegetation' location
Value: no
Source: Sheard et al. 2024
Nest has a 'water' location
Value: no
Source: Sheard et al. 2024
Value: Scrape; Platform
Source: Chia et al. 2023
Nest has a 'cavity' structure
Value: no
Source: Sheard et al. 2024
Nest has a 'clearing' structure
Value: no
Source: Sheard et al. 2024
Nest has a 'cup' structure
Value: no
Source: Sheard et al. 2024
Nest has a 'dome' structure
Value: no
Source: Sheard et al. 2024
Nest has a 'dome-and-tube' structure
Value: no
Source: Sheard et al. 2024
Nest has an 'excavation' structure
Value: no
Source: Sheard et al. 2024
Nest has a 'excavation-with-nest' structure
Value: no
Source: Sheard et al. 2024
Nest has a 'mound' structure
Value: no
Source: Sheard et al. 2024
Nest has a 'none' structure
Value: yes
Source: Sheard et al. 2024
Nest has a 'platform' structure
Value: yes
Source: Sheard et al. 2024
Nest has a 'ring' structure
Value: no
Source: Sheard et al. 2024
Nest has a 'scrape' structure
Value: no
Source: Sheard et al. 2024
Value: False
Source: Chia et al. 2023
Adult annual survival rate
Value: 0.915132337
Units: annual rate
Source: Bird et al. 2020
Average generation length (years)
Value: 13.99
Units: years
Source: Birdlife 2024
Value: 12.75575929
Range: 11.98009773 - 14.10897972
Units: years
Source: Bird et al. 2020
Value: 40
Units: years
Source: Bird et al. 2020
Value: 32.31628709
Units: years
Source: Bird et al. 2020
Value: 50
Range: 13.16666667 - 50
Units: years
Source: Myhrvold et al. 2015
Value: 40
Units: years
Source: Myhrvold et al. 2015
Population decline over 10 years
Value: 7%
Range: 6% - 8%
Units: percent
Source: Bird et al. 2020
Population decline over 3 generation
Value: 24%
Range: 21% - 25%
Units: percent
Source: Bird et al. 2020
Value: 0: No
Source: Sekercioglu et al. 2025
Value: 0: No
Source: Sekercioglu et al. 2025
Value: 0: No
Source: Sekercioglu et al. 2025
Value: 0: No
Source: Sekercioglu et al. 2025
Value: No
Source: Sekercioglu et al. 2025