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Snapshot
Primary Traits
216.8 g
0 m - 500 m
49
—
Record section
Identity and Taxonomy
Scientific identity, taxonomic placement, and source lineage.
Scientific name
Larus bulleri
English name
Black-billed Gull
Order
Charadriiformes
Family
Laridae
Genus
Larus
Species
bulleri
Data source
HBW3, BOTW, D07
Record section
Conservation and Range
Threat status and geographic distribution signals.
Conservation status
Near-threatened
Range restricted
No
Island endemic
Yes
Biogeographic realm
New Zealand & islands
Latitudinal zone
Temperate
Record section
Measurements
Mass and elevation values from the stored record.
Minimum female mass
109 g
Maximum female mass
260 g
Minimum male mass
195 g
Maximum male mass
277 g
Minimum unsexed mass
190 g
Maximum unsexed mass
270 g
Average mass
216.8 g
Minimum elevation
No data
Typical lower elevation
0 m
Typical upper elevation
500 m
Maximum elevation
No data
Elevation range
500 m
Typical elevation
250 m
Record section
Ecology
Habitat, diet, and specialization profile.
Primary habitat
Coastal
Habitat breadth
4
Primary diet
Invertebrate
Diet breadth
2
Diet specialization index
1.1
Record section
Behavior and Reproduction
Breeding, nesting, incubation, and social traits.
Social behavior
Colonial
Mating system
Monogamous
Cooperative breeding
No data
Nest type
Scrape
Nest substrate
No data
Minimum broods per year
No data
Maximum broods per year
No data
Minimum clutch size
1
Maximum clutch size
3
Incubating sex
Both
Minimum incubation period
20 d
Maximum incubation period
24 d
Minimum fledging period
26 d
Maximum fledging period
No data
Nest parasitism
No data
Average clutch size
2
Average fledging period
26 d
Record section
Mobility and Flight
Flight ability and movement pattern.
Flight status
Flies
Mobility patterns
Migratory