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Whiskered TernAlternate name(s): "Marsh Tern" Size: 24-28 cm; wing span: 57-63 cm Weight: 60-110 g |
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Photos |
Race "javanicus"
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ADULT |
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BREEDING |
Sex unknown |
Frontal view of Whiskered Terns in breeding
plumage;
click on image to see, for comparison,
Australian Pelicans
(photo courtesy of M. Eaton)
[Atkinson Dam, near Lowood, QLD, October 2019]
Whiskered Terns in breeding
plumage,
frontal view on the left
(photo courtesy of M. Eaton)
[Atkinson Dam, near Lowood, QLD, October 2019]
Lateral view of Whiskered Terns in breeding
plumage
resting on the shore of an
ephemeral lake
[Goran Lake, NSW, February 2012]
Lateral view of Whiskered Terns on the shore of an
ephemeral
lake, one with its wings stretched
[Goran Lake, NSW, February 2012]
Dorsal view of Whiskered Terns at an
irrigation farm dam
(photo courtesy of C. Hayne)
[Near Moree, NSW, 2012]
Frontal view of a Whiskered Tern in breeding
plumage
in flight, hovering just before dipping
towards the surface of a fresh water
lake
[Narrabri Lake, NSW, September 2010]
Near-frontal view of a Whiskered Tern in breeding plumage hovering (photo courtesy of
J. Greaves)
[Marlgu Billabong, Wyndham, WA, January 2016]
Lateral view of a Whiskered Tern in flight, with the wings up
[Burren Junction Bore Bath, NSW, December 2015]
Here a view of the Whiskered Tern's upperwings
[Goran Lake, NSW, February 2012]
Lateral view of a Whiskered Tern in breeding
plumage
in flight in a coastal habitat
(photo courtesy of B. Hensen)
[Lee Point, Darwin, NT, June 2019]
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NON-BREEDING |
Sex unknown |
Whiskered Terns in non-breeding
plumages
(photo courtesy of P. Brown)
[McMinns Lagoon, near Darwin, NT, September 2018]
Whiskered Terns in various
plumages
(photo courtesy of P. Brown)
[McMinns Lagoon, near Darwin, NT, September 2018]
Dorsal/ventral view of a Whiskered Tern in non-breeding
plumage
[Narrabri Lake, NSW, November 2010]
Dorsal view of a soaring Whiskered Tern in non-breeding
plumage
[Narrabri Lake, NSW, November 2010]
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IMMATURE/JUVENILE |
Adult Whiskered Tern in non-breeding plumage (right), with a juvenile;
note the adult bird's reddish legs
[Narrabri Lake, NSW, November 2010]
Adult Whiskered Tern in non-breeding plumage (centre) with two juveniles
[Narrabri Lake, NSW, November 2010]
The same three Whiskered Terns as shown above, now hovering in flight
[Narrabri Lake, NSW, November 2010]
Juvenile Whiskered Tern stretching its wings
(photo courtesy of R. Plumtree)
[Lake Omeo, Benambra, East Gippsland, VIC, February 2017]
Juvenile Whiskered Tern begging for food
(photo courtesy of R. Plumtree)
[Lake Omeo, Benambra, East Gippsland, VIC, February 2017]
Lateral view onto the upperparts of a juvenile Whiskered Tern in
flight (photo courtesy of P. Brown)
[Leanyer Swamp, Darwin, NT, October 2019]
Lateral view of a juvenile Whiskered Tern in flight
(photo courtesy of P. Brown)
[Leanyer Swamp, Darwin, NT, October 2019]
Close-up near-dorsal/ventral view of a juvenile Whiskered Tern with its
wings angled, just before going into a dive
[Narrabri Lake, NSW, November 2010]
Lateral view of a juvenile Whiskered Tern soaring
[Narrabri Lake, NSW, November 2010]
Distant lateral view of a fledgling Whiskered Tern in flight
(photo courtesy of R. Plumtree)
[Lake Omeo, Benambra, East Gippsland, VIC, February 2017]
Whiskered Tern chick resting in reeds
(photo courtesy of R. Plumtree)
[Lake Omeo, Benambra, East Gippsland, VIC, February 2017]
Whiskered Tern feeding a chick "on the wing" (photo courtesy of
R. Plumtree)
[Lake Omeo, Benambra, East Gippsland, VIC, February 2017]
Whiskered Tern feeding a chick (photo courtesy of
R. Plumtree)
[Lake Omeo, Benambra, East Gippsland, VIC, February 2017]
Two Whiskered Tern chicks begging to be fed (photo courtesy of
R. Plumtree)
[Lake Omeo, Benambra, East Gippsland, VIC, February 2017]
Dorsal view of a Whiskered Tern chick (photo courtesy of
R. Plumtree)
[Lake Omeo, Benambra, East Gippsland, VIC, February 2017]
Whiskered Tern chick begging to be fed (photo courtesy of
R. Plumtree)
[Lake Omeo, Benambra, East Gippsland, VIC, February 2017]
Race "hybridus"
Photos of Whiskered Terns, nominate race "hybridus", were taken by us in Europe.
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Breeding information |
Breeding season: Sep - Jan | Eggs: 2 - 3 | Incubation period: 18 - 20 days | Fledging age: ca. 21(?) days |
The breeding season depends on geographic latitude and on weather conditions. Given the right circumstances, e.g. after substantial inland rainfall, Whiskered Terns can, in principle, breed at any time of the year. In the tropical North the main breeding season is around February-April.
Nest building: Female & male | Incubation: Female & male | Dependent care: Female & male |
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Nest |
"bungobittah", "malunna" = nest [Aboriginal] |
Type: Basket | Material: Grass stems, dry aquatic plants | Height above ground: N/A |
Whiskered Tern nest with 3 eggs inside (photo courtesy of D. Johnston)
[Near Baradine, NSW, 1980ies]
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Eggs |
"boyanga", "booyanga", "derinya", "dirandil", "koomura", "ngampu", "nooluk", "pateena" = Egg; "dirundirri" = eggs [Aboriginal]; "gawu" = eggs [gamilaraay] |
Size: 37 x 27 mm | Colour: Off-white, with dark-brown speckles | Shape: Tapered oval |
The pattern and density of speckles can vary significantly.
Closer look at 3 Whiskered Tern eggs (photo courtesy of D. Johnston)
[Near Baradine, NSW, 1980ies]
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Behaviour |
Juvenile Whiskered Terns normally remain in the area where they have hatched (usually in inland freshwater wetlands) until they have moulted out of juvenile plumage into adult plumage. Only then they normally leave the area.
Surprise detection of a juvenile Whiskered Tern (the small tern
at the centre with the scalloped dark back), surrounded by two adults
in non-breeding plumage
and 3 other tern species,
on a beach,
away from where it must have hatched
(photo courtesy of B. Hensen)
[Lee Point, Darwin, NT, July 2018]
Whiskered Terns can congregate into substantial flocks of up to several hundred birds.
Flock of Whiskered Terns resting on the shore of an
ephemeral lake;
click on image to see the entire flock
[Goran Lake, NSW, December 2012]
Part of a flock of Whiskered Terns above an
irrigation dam
(photo courtesy of C. Hayne)
[Near Moree, NSW, October 2010]
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Food, Diet |
Like all terns, Whiskered Terns feed on fish, which they catch with their bills just under the surface of inland waters in a steep high-speed dive from considerable height. Seen by us to also take large insects, such as e.g. dragonflies.
Whiskered Tern picking prey off mud on the wing
(photo courtesy of M. Eaton)
[Gold Scrub Lane, Lake Samsonvale, QLD, December 2019]
Whiskered Tern taking off with its prey
(photo courtesy of M. Eaton)
[Gold Scrub Lane, Lake Samsonvale, QLD, December 2019]
Whiskered Tern that has just caught a dragonfly; the hunting technique used to catch the insect was identical to that employed for catching fish
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Call(s)/Song |
For this species we have recorded the following call(s)/song. The
interpretation of their meaning is our own;
comments and suggestions for improvement are welcome.
whstern_20151219.m4a |
javanicus (NW NSW) |
? (hunting) | © MD | |
whstern_20151219_2.m4a |
javanicus (NW NSW) |
? (+ Red-necked Avocet) | © MD |
More Whiskered Tern sound recordings are available at
xeno-canto.org
.