Oophaga lehmanni Reintroduction
Field notes from a long-running effort to bring one of the most threatened poison frogs back to the cloud forests it disappeared from — what worked, what stalled, and what we are doing differently this season.
Oophaga lehmanni once carpeted patches of the Colombian cloud forest. Habitat loss, smuggling, and chytridiomycosis have left only fragmented populations. The current reintroduction effort is the third we have run on this species and is the first that has carried a cohort through to a stable second season in the wild.
What changed this time
The frogs were never the bottleneck. The site, the leaf-litter community, and the political will to police the trail network were the bottleneck — and we needed all three.
Earlier attempts focused almost entirely on producing healthy froglets in captivity. We assumed the forest would do the rest. It did not.
This season, the bulk of the work happened before any frog left a tub. We mapped invertebrate density, restored downed-wood structure, and signed agreements with the nearest community to monitor and patrol the release site.
Lessons we are carrying forward
- Pre-release habitat scoring matters more than release-cohort size.
- Community-led monitoring beats remote-camera-only monitoring almost every time.
- Frog welfare during transport drives first-month survival far more than founder genetics.
About Vaclav Pavlicek
Vaclav Pavlicek is a conservation biologist working on amphibian reintroduction across South America, with a long-running focus on Colombian endemic frog species.