CHESTER, United Kingdom (CBSDFW.COM) – A critically endangered chimpanzee was born at Chester Zoo – the first in almost a decade.

The female baby was born on June 4 to a 24-year-old Western chimpanzee named ZeeZee, who was also born at the zoo in northern England.

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endangered chimpanzee born (Chester Zoo)

It increased the chimpanzee population at Chester Zoo to 20.

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The birth follows a scientific project, spanning several years, which has examined genetics and identified the chimps at Chester as a critically important breeding population.

The baby is in good health and inseparable from her doting mother.

endangered chimpanzee born (Chester Zoo)

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It is estimated there could be as few as 18,000 Western chimpanzees remaining in the wild.