Fourth grade studied ecosystems this year and we learned about food webs. When one population in a food web changes, all the populations in the food web can be affected. This giant Bufo toad was introduced to Florida to help control insect populations and is replacing the native Southern toad. It is an invasive species. If you travel to Florida with your dogs, please read about the Bufo toad on the link below. Its secretions are highly toxic to dogs and cats.