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Letter-winged KiteSize: 30-36 cm; wing span 85-100 cm Weight: 280-300 g |
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Similar |
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Photos |
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ADULT |
The birds for which a putative sex is given below were not sexed by their appearance, but by their previously recorded behaviour. Females are the primary carers of young, while males stay near the nest but don't usually incubate or brood the clutch.
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MALE |
Full-frontal portrait of a (presumably male) Letter-winged Kite that was
found near an active nest, but not brooding the young
(photo courtesy of M. Eaton)
[Birdsville Development Road, QLD, September 2022]
Full-frontal view of a (presumably male) Letter-winged;
note the clean front
(photo courtesy of M. Eaton)
[Birdsville Development Road, QLD, September 2022]
Near-frontal view of a (presumably male) Letter-winged
(photo courtesy of M. Eaton)
[Birdsville Development Road, QLD, September 2022]
Near-lateral view of a (presumably male) Letter-winged
(photo courtesy of M. Eaton)
[Birdsville Development Road, QLD, September 2022]
Lateral view of a (presumably male) Letter-winged Kite
looking towards the observer
(photo courtesy of M. Eaton)
[Birdsville Development Road, QLD, September 2022]
Lateral view of a (presumably male) Letter-winged Kite
(photo courtesy of M. Eaton)
[Birdsville Development Road, QLD, September 2022]
Near-dorsal portrait of a (presumably male) Letter-winged Kite
(photo courtesy of M. Eaton)
[Birdsville Development Road, QLD, September 2022]
Near-dorsal view of a (presumably male) Letter-winged
(photo courtesy of M. Eaton)
[Birdsville Development Road, QLD, September 2022]
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FEMALE |
Frontal view of a (presumably female) Letter-winged Kite waiting
nearby while its nest is being inspected; note the soiled front
(photo courtesy of M. Eaton)
[Birdsville Development Road, QLD, September 2022]
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PAIR |
Lateral view of a pair of Letter-winged Kites
(photo courtesy of M. Eaton)
[Strzelecki Track, 20 km N of Montecollina Bore, SA, June 2022]
Lateral view of a pair of Letter-winged Kites, one now issuing
alarm calls
(photo courtesy of M. Eaton)
[Strzelecki Track, 20 km N of Montecollina Bore, SA, June 2022]
Sex unknown |
Close-up lateral view of a Letter-winged Kite
(photo courtesy of M. Eaton)
[Strzelecki Track, 20 km N of Montecollina Bore, SA, June 2022]
Close-up lateral view of a Letter-winged Kite staring down the observer
(photo courtesy of M. Eaton)
[Strzelecki Track, 20 km N of Montecollina Bore, SA, June 2022]
Near-dorsal view of a Letter-winged Kite perched on a tree top
(photo courtesy of M. Mearns)
[Diamantina NP, QLD, August 2019]
Direct comparison between a
Black-shouldered Kite,
left, and a
Letter-winged Kite,
right - note the differences in the black eye patch and the
colour of the legs/feet; the difference in the appearance of
the upperwing patch may be a projection effect
(photos courtesy of M. Mearns)
[Diamantina NP, QLD, August 2019]
Near-lateral view of a Letter-winged Kite in flight
(photo courtesy of M. Eaton)
[Strzelecki Track, 20 km N of Montecollina Bore, SA, June 2022]
Lateral view of a Letter-winged Kite in flight being harassed by a corvid
(photo courtesy of M. Eaton)
[Strzelecki Track, 20 km N of Montecollina Bore, SA, June 2022]
Lateral/ventral view of a Letter-winged Kite in flight
(photo courtesy of M. Eaton)
[Strzelecki Track, 20 km N of Montecollina Bore, SA, June 2022]
Ventral view of a Letter-winged Kite in flight
(photo courtesy of M. Eaton)
[Strzelecki Track, 20 km N of Montecollina Bore, SA, June 2022]
Ventral view of a Letter-winged Kite in flight
(photo courtesy of M. Eaton)
[Strzelecki Track, 20 km N of Montecollina Bore, SA, June 2022]
Ventral view of a Letter-winged Kite in flight
(photo courtesy of M. Eaton)
[Strzelecki Track, 20 km N of Montecollina Bore, SA, June 2022]
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IMMATURE/JUVENILE |
Close-up lateral view of a sub-adult Letter-winged Kite - note the
rufous wash on the upperparts; the streaking on the forehead may be
blood; although this bird does not have "typical" adult
plumage yet,
it was one in a mated pair, see photos above
(photo courtesy of M. Eaton)
[Strzelecki Track, 20 km N of Montecollina Bore, SA, June 2022]
Close-up lateral view of a sub-adult Letter-winged Kite
(photo courtesy of M. Eaton)
[Strzelecki Track, 20 km N of Montecollina Bore, SA, June 2022]
Close-up lateral view of a sub-adult Letter-winged Kite issuing its
call
(photo courtesy of M. Eaton)
[Strzelecki Track, 20 km N of Montecollina Bore, SA, June 2022]
Dorsal view of a sub-adult Letter-winged Kite
(photo courtesy of M. Eaton)
[Strzelecki Track, 20 km N of Montecollina Bore, SA, June 2022]
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Breeding information |
Breeding season: (after rain) | Eggs: 3 - 6 | Incubation period: 25 - 36 days | Fledging age: 30 - 35 days |
Nest building: ? | Incubation: Female | Dependent care: Female & male |
Letter-winged Kites are specialists for living in the Red Centre of the Australian continent. As such, they do not have a seasonal breeding cycle, like all other species, but are purely opportunistic breeders based on when prey (Long-haired Rat) is abundant. Once conditions are good, 2-50 pairs can breed semi-colonially. They can have up to several broods in a row, building a new nest for each (because of the danger of parasites taking a hold).
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Twitcher's tip |
Note that, by the time they fledge (i.e., leave their nest), the young of all species of raptors - apart from the tail and wing feathers (which are still growing) - are already full adult-size.
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Nest |
"bungobittah", "lar", "malunna", "jindi" [bundjalung] = nest [Aboriginal] |
Type: Basket | Material: Sticks; green leaves | Height above ground: 5? - 20? m |
Nests are usually built high up in the canopy of a live tree, often in Beefwood (Grevillea striata).
Overview of the location of a Letter-winged Kite nest in an
essentially dead tree
(photo courtesy of M. Eaton)
[Birdsville Development Road, QLD, September 2022]
(Presumably female) Letter-winged Kite on its nest in an
essentially dead tree
(photo courtesy of M. Eaton)
[Birdsville Development Road, QLD, September 2022]
View into a Letter-winged Kite nest with downy chicks inside
(photo courtesy of M. Eaton)
[Birdsville Development Road, QLD, September 2022]
(Presumably female) Letter-winged Kite waiting nearby while its
nest is being inspected; note the soiled front
(photo courtesy of M. Eaton)
[Birdsville Development Road, QLD, September 2022]
One of two Letter-winged Kite nests in the top of a live tree
(photo courtesy of M. Eaton)
[Strzelecki Track, 20 km N of Montecollina Bore, SA, June 2022]
Second of two Letter-winged Kite nests in the top of a live tree
(photo courtesy of M. Eaton)
[Strzelecki Track, 20 km N of Montecollina Bore, SA, June 2022]
Overview of the location of a Letter-winged Kite nest
(photo courtesy of M. Eaton)
[Strzelecki Track, 20 km N of Montecollina Bore, SA, June 2022]
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Eggs |
"boyanga", "booyanga", "derinya", "dirandil", "koomura", "mirk", "ngampu", "nooluk", "pateena", "pum-pum" = Egg; "dirundirri" = eggs [Aboriginal]; "gawu" = eggs [gamilaraay] |
Size: 42 x 32 mm | Colour: Creamy, with very dense dark-brown speckles | Shape: Tapered oval |
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Behaviour |
The Letter-winged Kite is special, because it is the only fully nocturnal raptor from the hawk family (i.e. not related to the owls, nightjars or frogmouths.
Letter-winged Kites are also special because highly reliant on the Long-haired Rat (Rattus villosissimus) for food. This is the reason for the species' eruptive behaviour, when breeding up and following their prey. The core range of the Long-haired Rat extends throughout western QLD into the NT and eastern SA and, to a lesser degree, to far-western NSW. The Letter-winged Kite's core range is western QLD, primarily around Mt. Isa, extending into the NT, eastern SA and western NSW depending on the availability of prey. Usually, both species find times of plenty after significant inland rain events.
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Food, Diet |
Adults: Long-haired Rats | Dependents: As adults | Water intake: None |
All raptors are carnivores. Letter-winged Kites have a strong preference for Long-haired Rats, Rattus velocissimus.
During the first few weeks, raptors feed their chicks with pieces of meat. Later on in their development, the chicks learn to tear apart their parents' prey.
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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.
letkite_me_20220610.m4a | (NE SA) | Alarm calls (humans near nest) | © ME |
More Letter-winged Kite sound recordings are available at
xeno-canto.org
.