Threskiornis spinicollis
Silhouette: PhyloPic
In 3 days ~10% in a week ~20%
The straw-necked ibis (Threskiornis spinicollis) is a bird of the ibis and spoonbill family Threskiornithidae. It can be found throughout Australia, New Guinea, and parts of Indonesia. Adults have distinctive straw-like feathers on their necks.
Straw-necked ibises are large birds, around 59–76 cm (23–30 in) long, with a bare black head and a long, downcurved black bill. They have a distinctive, highly iridescent plumage, which can appear fairly uniform dirty dark brown in indifferent light; the wings are dark, with an iridescent, multicoloured sheen in sunlight. They have a shiny blue-black back, with a metallic purple, green and bronze glow, and a dark collar. The upper neck is white, as are the underparts and the undertail; their legs are usually red near the top and dark grey toward the feet. Adults have straw-colored feathers on the neck, giving the bird its common name. Their wingspan is about 100–120 cm (39.5–47 in) and weight is generally 1.1–1.5 kg (2.5–3.5 lb).
Sexes are similar, although males have longer bills and females have a dark band across their upper breast. Juveniles have duller colors and shorter bills with less curvature, and lack the straw-like... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kakadu National Park | 🇦🇺 Australia | |
| 2 | Litchfield National Park | 🇦🇺 Australia | |
| 3 | Daintree National Park | 🇦🇺 Australia | |
| 4 | Nitmiluk National Park | 🇦🇺 Australia | |
| 5 | Grampians National Park | 🇦🇺 Australia | |
| 6 | Wilsons Promontory National Park | 🇦🇺 Australia | |
| 7 | Springbrook National Park | 🇦🇺 Australia | |
| 8 | Great Otway National Park | 🇦🇺 Australia | |
| 9 | Hattah-Kulkyne National Park | 🇦🇺 Australia | |
| 10 | Lamington National Park | 🇦🇺 Australia | |
| 11 | Blue Mountains National Park | 🇦🇺 Australia | |
| 12 | Royal National Park | 🇦🇺 Australia |
Rare
Under 5% of wildlife watchers report a Straw-necked Ibis sighting in Great Otway National Park on a given day, based on 86 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 117th most-seen of the 175 birds we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
August and September
In those months about 10% of wildlife watchers report a Straw-necked Ibis in Great Otway National Park on a given day, against under 5% in October to July, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Straw-necked Ibis sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
8th of 12
Of the 12 parks where we can rate Straw-necked Ibis sightings, Great Otway National Park ranks 8th at under 5%. The best odds are in Kakadu National Park (Australia, about 50%), Litchfield National Park (Australia, about 30%) and Daintree National Park (Australia, about 10%).
GBIF citizen-science records
It is estimated from how often the Straw-necked Ibis is recorded against all the birds logged in Great Otway National Park (86 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
