1 / 4   A baby critically endangered Javan green magpie has been growing well at the Czech Republic’s Prague Zoo, partly thanks to an innovative new feeding method, the zoo said on Tuesday. /VCG Photo

2 / 4   Workers at the zoo fed one of the chicks with the help of a puppet and tweezers, resembling the adult of the extremely extinct species, which is likely to only number around 100 on the planet. They expect to use this method to help the species reproduce and avoid imprinting on humans. /VCG Photo

3 / 4   Boasting as the first zoo in Europe to successfully breed the bird in captivity, Prague Zoo is now home to six Javan green magpies, including two chicks. /VCG Photo

4 / 4   The endangered bird has unique features including blue-green feathers and an orange-red beak. It is one of the rarest birds on Earth. Antonin Vaidl, the bird curator of the zoo, told AFP that "Pessimistic estimates indicate that there are fewer than 50 birds in Indonesia, its country of origin." /VCG Photo