The Prince of Wales has suggested that to combat organised gangs in the illegal wildlife trade countries should take back their "ill-gotten gains".
Charles's comments came as he gave a major speech at a conference of world leaders gathered to tackle the threat to endangered animals like tigers, elephants and rhinos.
With his sons the Duke of Cambridge and Prince Harry by his side, the Prince told the summit that the scale of the poaching crisis had reached "unimaginable heights" in certain countries, and there was "not a moment to lose" to safeguard threatened species.
Charles, a long-term campaigner on wildlife conservation, praised the leaders and foreign government ministers for meeting at Lancaster House in London to address the issue.
He said: "Today, if I may say so, you are breaking new ground by coming together and committing - at high levels never before seen at a conference on this topic - to take urgent action to put a stop to this trade, which has become a grave threat not only to the wildlife and the people who protect them, but also to the security of nations."
He added: "Next month, I hope it will be possible to convene a meeting to encourage governments, banks, accounting firms, security agencies and others to make greater use of financial tools to tackle organised crime engaged in the illegal wildlife trade.
"As many experts are telling us, if we 'follow the money' and take back organised crime's ill-gotten gains - now done of course to combat trafficking in drugs, weapons and people - we can send a strong message to criminals that there are serious consequences when they kill endangered wildlife for profit."