Critically-endangered gorillas will be the subject of an expert talk at Bristol Zoo Gardens tonight.

World-renowned tropical field biologist and conservationist, Ian Redmond OBE, is visiting the Zoo to give his views on the future of gorillas in the wild.

The event, called Gorillas – Survival or Extinction? is part of a series of three talks at the Zoo this autumn in support of the worldwide Year of the Gorilla campaign.

The evening lectures each offer an opportunity to hear fascinating, first-hand personal experiences from world-renowned gorilla experts.

Mr Redmond, ambassador for the UN's Year of the Gorilla, is best known for his work with great apes and his work with the late Dr Dian Fossey who devoted her life to protecting and studying the mountain gorillas of Africa.

The next event, on Saturday, November 7, is called My life with gorillas by animal welfare hero, Rachel Hogan.

The final talk in the series, on Thursday, November 26, sees Bristol Zoo's head of veterinary services, Sharon Redrobe, talk about her experiences working with gorillas in zoos and in the wild.

All talks will be held in The Pavilion at Bristol Zoo Gardens from 6.30pm to 9pm. Tickets are £4 (£3 for students), and advance booking is advised where possible.

To book, phone 0117 974 7300 or email receptionist@bristolzoo.org.uk.