PHILADELPHIA — Workers at the Philadelphia Zoo have finally determined the gender of a baby gorilla born last month, and it’s a girl.

The baby gorilla’s 21-year-old mother, Honi, had been holding it so closely after its birth Aug. 26 that zookeepers couldn’t confirm if it was male or female.

The zoo is encouraging the public to help name the baby western lowland gorilla. It’s partnering with a sanctuary in the Democratic Republic of Congo that rehabilitates Grauer’s gorillas whose families have been killed by poachers.

Voters can go online to donate a dollar and choose from a list of names that honor orphaned gorillas. The money benefits the sanctuary.

Western lowland gorillas are listed as critically endangered.