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gptkbp:instance_of
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gptkb:bird
gptkb:Chunin_Exams
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gptkbp:adaptations
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seasonal migration
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gptkbp:adult_plumage
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gray and white
brown and mottled
white and gray with black cap
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gptkbp:appearance
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slender body
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gptkbp:behavior
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social
aggressive during nesting
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gptkbp:breeding_range
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gptkb:Central_America
gptkb:North_America
Canada and northern United States
up to several hundred pairs
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gptkbp:breeding_season
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spring to summer
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gptkbp:character_voice
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high-pitched calls
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gptkbp:chick_development
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precocial
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gptkbp:color
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gptkb:black
white and gray
red-orange
breeding plumage
black cap
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gptkbp:coloration
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white and gray
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gptkbp:conservation_efforts
|
habitat protection
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gptkbp:conservation_status
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gptkb:Least_Concern
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gptkbp:diet
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gptkb:fish
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gptkbp:distribution
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gptkb:North_America
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gptkbp:egg_color
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white to pale blue
white or pale blue
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gptkbp:eye_color
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dark
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gptkbp:family
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gptkb:Laridae
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gptkbp:first_described_by
|
1819
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gptkbp:fishing_regulations
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surface diving
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gptkbp:fledging_period
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4 to 5 weeks
4-5 weeks
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gptkbp:foraging_behavior
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hovering
surface feeding
dive for fish
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gptkbp:genus
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gptkb:Sterna
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gptkbp:habitat
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wetlands
shallow coastal waters
shallow lakes and marshes
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gptkbp:habitat_preference
|
open water
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|
https://www.w3.org/2000/01/rdf-schema#label
|
Forster's tern
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gptkbp:human_interaction
|
birdwatching
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gptkbp:incubation_period
|
21-24 days
21 to 25 days
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gptkbp:is_observed_in
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common in suitable habitats
|
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gptkbp:length
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30 to 36 cm
30–36 cm
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gptkbp:lifespan
|
up to 15 years
|
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gptkbp:mating_system
|
aerial displays
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gptkbp:migration
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autumn
migratory
late summer to fall
coastal routes
up to 2000 km
coastal and inland routes
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gptkbp:named_after
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gptkb:George_Forster
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gptkbp:nest_location
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islands and sandbars
|
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gptkbp:nest_material
|
grasses and reeds
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gptkbp:nesting
|
variable
varies by location
ground-nesting
lay 2-4 eggs
|
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gptkbp:nesting_site
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islands and sandbars
|
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gptkbp:order
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gptkb:Charadriiformes
|
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gptkbp:population
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varies seasonally
|
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gptkbp:population_trend
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gptkb:stable
|
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gptkbp:predators
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birds of prey
gulls
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gptkbp:range
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gptkb:North_America
|
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gptkbp:related_species
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gptkb:Arctic_tern
gptkb:Common_tern
|
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gptkbp:scientific_name
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gptkb:Sterna_forsteri
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gptkbp:social_behavior
|
colonial
colonial nesting
|
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gptkbp:social_structure
|
flocks
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gptkbp:species
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gptkb:Sterna_forsteri
|
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gptkbp:subspecies
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gptkb:Sterna_forsteri_forsteri
Sterna forsteri caspia
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gptkbp:tail_type
|
forked tail
forked
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gptkbp:threats
|
habitat loss
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gptkbp:weight
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100–200 g
100 to 150 g
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gptkbp:wing_configuration
|
long and pointed
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gptkbp:wingspan
|
76–85 cm
76 to 85 cm
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gptkbp:wintering_range
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coastal areas
southern United States and Mexico
southern United States and Central America
|
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gptkbp:young
|
chicks
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gptkbp:bfsParent
|
gptkb:Oregon_Coast_National_Wildlife_Refuge_Complex
gptkb:Common_tern
|
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gptkbp:bfsLayer
|
7
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