The Zoological Society of London (ZSL) has launched a voluntary redundancy scheme in an effort to reduce costs by £2m a year.
The wildlife charity, which runs London Zoo and Whipsnade Zoo in Bedfordshire, says it has been "hit hard by the abrupt end" of USAID funding, the UK government's 40% cut to foreign aid spending, and the ongoing cost-of-living crisis.
Matthew Gould, chief executive of ZSL, has said he could not rule out future compulsory redundancies but "is doing everything possible" to avoid them.
The government said it remained "committed to international development" and was "modernising" its approach to tackle the climate crisis. USAID has been approached for comment.
