Christmas Island National Park staff have worked west to east and bottom to top, collecting data on yellow crazy ants, red crabs and weeds in the seventh island-wide survey.
It took four months to complete over the tough terrain, with teams visiting about 1,100 sites across the 135 square kilometre island, checking the status of threatened species like emerald doves and the endemic fern Tectaria devexa var. minor.
The survey uncovered new and persistent crazy ant supercolonies – we baited the accessible areas to remove the ants before the red crabs began their migration.
Dion, Christmas Island National Park
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