Wonderland Sydney, the Eastern Creek amusement park that has attracted millions of thrill-seekers for 19 years, will close its gates for the final time in April.

Management says September 11, the Bali bombings, the collapse of insurance giant HIH, the SARS virus, and now the Asian bird flu "have simply taken their toll" on business.

Stephen Galbraith, chief executive of the Leisure Theme Parks Sunway Group, also blames "consistent losses" on the Asian financial crisis, the collapse of Ansett, the Iraq war and last year's bushfires. The Malaysian company Sunway Group, which has part-owned the theme park since 1997, blames Wonderland's demise on everything except poor management. Wonderland, home to the infamous Bush Beast rollercoaster and the stomach-churning Space Probe, will operate for the final time on April 26.