Statements (58)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:bird
|
| gptkbp:bfsLayer |
6
|
| gptkbp:bfsParent |
gptkb:Oregon_Coast_National_Wildlife_Refuge_Complex
gptkb:Hydroprogne_caspia |
| gptkbp:adaptation |
adapted to coastal life.
|
| gptkbp:adult_plumage |
brown and mottled
white and gray with black cap |
| gptkbp:affiliated_with |
bird conservation groups
|
| gptkbp:behavior |
colonial nesting
aggressive during nesting |
| gptkbp:breeding_season |
spring to summer
often large colonies |
| gptkbp:calls_for |
harsh and loud
|
| gptkbp:clutch_size |
typically 1 to 3 eggs
|
| gptkbp:color |
white and gray
long and pointed distinctive black cap on head |
| gptkbp:conservation_efforts |
habitat protection initiatives
|
| gptkbp:conservation_status |
gptkb:Least_Concern
|
| gptkbp:cultural_significance |
featured in local folklore
|
| gptkbp:diet |
gptkb:fish
|
| gptkbp:distribution |
worldwide except for polar regions
|
| gptkbp:egg_color |
white to pale blue
|
| gptkbp:family |
gptkb:Laridae
|
| gptkbp:first_flight |
strong and direct
|
| gptkbp:fishing_regulations |
estuaries and coastal waters
plunge diving |
| gptkbp:fledging_period |
about 35 to 45 days
|
| gptkbp:foraging_behavior |
diving for fish
|
| gptkbp:fossil_record |
ancient relatives known
|
| gptkbp:genus |
Hydroprogne
|
| gptkbp:habitat |
coastal areas
coastal regions |
| https://www.w3.org/2000/01/rdf-schema#label |
Caspian tern
|
| gptkbp:incubation_period |
about 25 to 30 days
|
| gptkbp:interacts_with |
often seen near fishing boats
|
| gptkbp:lifespan |
up to 20 years
|
| gptkbp:mating_system |
aerial displays
|
| gptkbp:migration |
seasonal migration
up to several thousand kilometers migratory bird |
| gptkbp:nesting |
varies by location
ground-nesting grasses and reeds sandy beaches and islands |
| gptkbp:population_trend |
stable in many areas
|
| gptkbp:predators |
larger birds and mammals
|
| gptkbp:related_species |
other terns
|
| gptkbp:research_interest |
studied for migration patterns
|
| gptkbp:social_structure |
hierarchical
|
| gptkbp:species |
gptkb:Hydroprogne_caspia
|
| gptkbp:subspecies |
several recognized subspecies
|
| gptkbp:threats |
habitat loss and pollution
|
| gptkbp:vision |
excellent eyesight
|
| gptkbp:weight |
0.5 to 1.5 kg
|
| gptkbp:wildlife |
popular among birdwatchers
|
| gptkbp:wingspan |
up to 1.5 meters
|
| gptkbp:wintering_range |
warmer coastal regions
|