Panama is another country to consider although some air travel is needed in country. There are 1020 species that have been spotted in Panama.
Good idea to check state department and CDC advisories for Latin America. Tourists can be taken hostage for ransom and there are diseases like yellow fever and Chagas disease as well as malaria, etc. My wife and I needed to schedule with a doctor who specialized with tropical medicine to get the vaccinations we needed for our trip to the Pantanal.
The most common deadly diseases in Latin America and the Caribbean could be eliminated with the implementation of medical programs.
fundahigadoamerica.org
We also rely on treating our clothing with permethrin and protecting our exposed skin with picaridin and both are safe for optical gear.