Brook Islands

Country/territory: Australia

IBA Criteria met: A4i, A4ii (2009)
For more information about IBA criteria please click here

Area: 71 ha

Protection status:

BirdLife Australia
Most recent IBA monitoring assessment
Year of assessment Threat score (pressure) Condition score (state) Action score (response)
2018 high unfavourable medium
For more information about IBA monitoring please click here

Site description
The Brook Islands are a group of small granitic islands in the inshore Great Barrier Reef, 8 km off Hitchinbrook Island north of Townsville. The four named islands in the group are North (49 ha), Tween (2 ha), Middle (5 ha) and South Brook (14 ha) Islands. The islands are covered with rainforest above highwater mark, most probably derived from the droppings of birds feeding in rainforest on the mainland but breeding on the island. The coral sand beaches also sometimes support substantial numbers of breeding seabirds. The IBA could be extended to include other neighbouring islands that sometimes support large colonies of Lesser Crested Terns such as Taylor Cay (2000 Lesser Crested Tern in 1973 and 3000 in 1988).

Key biodiversity
Brook Islands also supports populations of Roseate Tern and Black-naped Tern breeding on shingle beaches on the island as well as at least one pair of Beach Stone-curlew. Bridled Tern breed among the rocks, Orange-footed Scrubfowl are resident and Noisy Pitta are frequent visitors.

Non-bird biodiversity: The island is also notable for the rainforest, almost all of which is thought to be derived from seed brought back by pigeons from the mainland.

Recommended citation
BirdLife International (2019) Important Bird Areas factsheet: Brook Islands. Downloaded from on 20/05/2019.