gulabaa

The coolabah, or coolibah, is a species of eucalyptus — Eucalyptus coolabah — that grows along the watercourses and floodplains of inland Australia, particularly in Queensland, New South Wales, and the Northern Territory. Its name derives from the Yuwaalaraay language of northwestern New South Wales, one of the Gamilaraay language group, where the word was recorded by early European settlers in various spellings: coolabah, coolibah, kulibah. The Yuwaalaraay and neighbouring Gamilaraay peoples had lived alongside this tree for tens of thousands of years, and their name encoded knowledge of its ecology — it is a tree that marks the presence of water in otherwise parched country, a sentinel of floodplain and seasonal creek. To know the coolabah was to know where water lay beneath the red-brown soil.

For Aboriginal peoples across the inland river systems, the coolabah was far more than a shade tree. Its bark was used for shelter construction and as a medium for carving. Its roots, which penetrate deep to permanent water even when the surface is dry, were sources of emergency water. Its hollows provided nesting sites for parrots and possums. Its canopy sheltered camps during the brutal summer heat of the Australian interior. The annual flooding of the river systems — the Darling, the Paroo, the Warrego — that coolabah trees mark was itself a calendar, a measure of season and abundance. Fish, waterbirds, and frogs returned with the floodwaters; the coolabahs standing at the high-water line recorded where the flood had been.

Banjo Paterson's 1895 ballad 'Waltzing Matilda' immortalised the coolabah in Australian cultural consciousness: 'Once a jolly swagman camped by a billabong / Under the shade of a coolabah tree.' The song — which became Australia's most recognisable unofficial anthem — set its opening scene at the junction of two Aboriginal ecological terms: billabong (from the Wiradjuri language, meaning a waterhole formed by a river's old course) and coolabah. The most quintessentially Australian image in the most Australian of songs is, at its linguistic core, a pair of Indigenous loanwords. Paterson, who grew up in the bush country of New South Wales, knew both words from the pastoral landscape; he borrowed them without ceremony, as bush vernacular did.

The coolabah entered Australian English as part of the broader adoption of Indigenous plant and animal names during the colonial period — a process in which settlers learned the ecological vocabulary of the continent from the people who had named it. Words like coolabah, mulga, mallee, and kurrajong entered colonial English as practical terms, plant names needed to describe a landscape that European botanical vocabulary had no words for. The retention of Indigenous plant names in Australian English is, in aggregate, a record of ecological knowledge transfer: the names that survived were the ones that named species or environments for which no English equivalent existed. The coolabah survived because there is no European tree quite like it — a eucalyptus that marks water in the inland, under whose shade the swagman still camps in the national imagination.