We have given numerous talks  in English and Spanish in the US and Latin America about natural history subjects over the years.  We have added a number of our talks to this page in order to provide a source of information for cactus (and other nature-oriented) groups to use.  In the event that your group prefers a live presentation we may be available to do so.  Depending on the location we would only request that transportation and lodging expenses are covered.  We do not charge honoraria.

A new page related to biodiversity is being developed here. When it is ready it will be made public.

Feel free to contact us for more details.