Isis is on the banks of the Serpentine
A three-metre tall bronze ibis has become the first sculpture to be unveiled in Hyde Park for 50 years.
The artwork, called Isis, will help to spearhead a fundraising drive to raise £1.8m to build an eco-friendly wildlife education centre in the London park.
A thousand small plaques have been set into the base of the sculpture and will be engraved with the name of any donors who give £1,000 for the project.
The appeal was launched by the Royal Parks Foundation and Halcyon Gallery.
The aim is to encourage thousands of city children to take an interest in the natural world, and appreciate wildlife at the education centre, called the Look Out.
It already welcomes more than 1,000 young people each year but the facilities are cramped and need to be revamped and upgraded.
A new centre would include two classrooms and would be a base for the Royal Parks' education team.
Sting and his wife Trudie Styler have already contributed to the scheme and been given a plaque, as has eco-campaigner and Tory hopeful Zac Goldsmith.
Mr Goldsmith said: "The Royal Parks provide some of the most important ecological centres in our country and Hyde Park is one of the least polluted spots in central London.
"The new Look Out centre will be the perfect place for young people to learn more about the natural world."
Artist Simon Gudgeon created the sculpture and named it after a goddess of nature.