THE hatching of critically endangered baby birds at Chester Zoo has been caught on camera for the first time.

The Javan green magpie is one of the world's most endangered species with only about 50 remaining in the wild, which places it on the verge of extinction.

These beautiful songbirds are trapped for the illegal bird trade and vast swathes of their native forest have fallen silent.

Chester is the first UK zoo to successfully breed the species to give a vital boost to its global population, with the eventual goal of returning birds to their natural habitat.

Now, for the first time, The Secret Life of the Zoo cameras have captured the moment magpie chicks are successfully hatched – as well as the courtship ritual between confident two-year-old Metina and her modest would-be suitor Permata who, at 10 months, still has to earn his dating spurs.

But as the tiny chicks emerge, their fragile lives are still vulnerable and there's no absolute guarantee of survival.

The Javan green magpie is listed as critically endangered by the International Union for the Conservation of Nature (IUCN) but bird experts are warning that the situation may have got worse in recent months amid fears that the magpies may now be close to extinction in the wild with no recent sightings reported.

The birds, scientific name cissa thalassina, are native to western Java in Indonesia and inhabit dense montainous forests.

The bright green plumage is attained through the food the birds eat – insects, frogs and lizards.

The breeding of several new chicks in Chester since 2015, when six pairs were flown from Indonesia in a bid to save them from extinction, has given a huge lift to conservation efforts to save the birds.