|
gptkbp:instance_of
|
gptkb:bird
|
|
gptkbp:bfsLayer
|
6
|
|
gptkbp:bfsParent
|
gptkb:White_tern
gptkb:White-winged_tern
gptkb:Common_tern
|
|
gptkbp:adult_plumage
|
brown and white mottled
distinctive black cap
|
|
gptkbp:aircraft_operated
|
long and pointed
|
|
gptkbp:behavior
|
colonial nesting
agile flyer
|
|
gptkbp:breeding_season
|
spring to summer
precocial
often in large groups
|
|
gptkbp:calls_for
|
trumpet-like
|
|
gptkbp:clutch_size
|
2-5 eggs
|
|
gptkbp:color
|
black and white
white and gray
dark gray and black
|
|
gptkbp:conservation_efforts
|
habitat restoration
|
|
gptkbp:conservation_status
|
gptkb:Least_Concern
|
|
gptkbp:cultural_significance
|
birdwatching interest
|
|
gptkbp:diet
|
insects
|
|
gptkbp:distribution
|
gptkb:North_America
|
|
gptkbp:egg_color
|
speckled brown
|
|
gptkbp:environmental_impact
|
affects migration patterns
|
|
gptkbp:family
|
gptkb:Laridae
|
|
gptkbp:first_flight
|
fast and agile
|
|
gptkbp:fishing_regulations
|
dipping and diving
|
|
gptkbp:fledging_period
|
3-4 weeks
|
|
gptkbp:foraging_behavior
|
hovering
skimming
|
|
gptkbp:genus
|
gptkb:Chlidonias
|
|
gptkbp:habitat
|
North America and Europe
wetlands
marshes
shallow marshes
open water areas
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Black tern
|
|
gptkbp:incubation_period
|
21-23 days
|
|
gptkbp:length
|
25–30 cm
|
|
gptkbp:mating_system
|
aerial acrobatics
|
|
gptkbp:migration
|
late summer
to South America
migratory bird
up to 5000 km
|
|
gptkbp:nesting
|
variable
ground-nesting
reeds and grasses
|
|
gptkbp:population_trend
|
gptkb:Professional_Wrestler
|
|
gptkbp:predators
|
birds of prey
|
|
gptkbp:related_species
|
gptkb:White-winged_tern
|
|
gptkbp:research
|
often seen in flocks
population monitoring
|
|
gptkbp:species
|
gptkb:Chlidonias_niger
|
|
gptkbp:subspecies
|
gptkb:Chlidonias_niger_surinamensis
gptkb:Chlidonias_niger_niger
|
|
gptkbp:tail_type
|
forked tail
|
|
gptkbp:threats
|
habitat loss
|
|
gptkbp:vocalization
|
varied calls
|
|
gptkbp:weight
|
100–200 g
|
|
gptkbp:wildlife
|
gptkb:metropolitan_area
high during nesting season
popular in wetlands.
|
|
gptkbp:wingspan
|
70–80 cm
|
|
gptkbp:wintering_range
|
gptkb:South_America
|
|
gptkbp:young
|
chicks
|