Priceless or worthless? That’s the question posed in a new report that lists the 100 most endangered animals, plants and fungi around the globe, as chosen by 8,000 experts for the Zoological Society of London and the International Union for Conservation of Nature. The question was raised because the species closest extinction don’t have an obvious economic value to mankind and yet some, especially the experts, would argue for their protection.

“The donor community and conservation movement are leaning increasingly towards a ‘what can nature do for us’ approach, where species and wild habitats are valued and prioritized according to the services they provide for people,” Jonathan Bailie, conservation director at the Zoological Society of London, said in a statement issued with the report. “This has made it increasingly difficult for conservationists to protect the most threatened species on the planet,” he added. “We have an important moral and ethical decision to make: Do these species have a right to survive or do we have a right to drive them to extinction?”