In 2017, Omar Trujillo Santos was sitting in a small wooden boat holding a crocodile, its skin soft like a snake. He helped untie the reptile, a juvenile Morelet’s crocodile, and carefully guided it into the dark water. It swam off to find a new home in the Alvarado Lagoons System in Veracruz, southeastern Mexico, completing the final phase of a mangrove restoration project. Studies suggest Mexico, a country rich in mangroves, has experienced the highest degree of mangrove loss in the Americas. Conservation and reforestation efforts seek to reverse this loss, yet many projects fail to restore a mature forest. Seedlings and young trees too often die due to improper planting techniques or unsuitable sites. Led by REVIVE, a nonprofit that works to boost biodiversity in the region, the Veracruz project aims to restore not just trees, but the mangrove ecosystem as a whole by employing Aztec-inspired planting methods to rebuild forests and using crocodiles to help maintain them. According to REVIVE, this technique has resulted in a fully restored forest. Conservationists involved in the project say they hope this success encourages others to consider how crocodiles could be used to benefit future mangrove restoration projects. Omar Trujillo Santos stands in front of a chinampa planted with mangrove seedings grown in a nursery. Image from Soto et al., 2026 (preprint) (CC BY 4.0). An ancient technique In 2006 when biologist Aníbal Ramírez Soto began working with mangroves in the wetlands around the Alvarado lagoons, he planted mangrove seedlings in…This article was originally published on Mongabay