There is no effect on frogs or toads that jump into the trap, as the activesare not toxic against them. We have experienced before that frogs that jumped into the trap wetted the gauze on the floater while trying to jump out (and thereby bumping t against the floater). There is no easy solution to prevent frogs from enteringthe traps unfortunately. We have designed the opening between the trap lid and container such that we get optimal mosquito entry. If we make this space smaller or add material that can block frogs etc, we will also limit how many mosquitoes will get attracted and enter the trap. In case there is a problem with frogs getting in, perhaps you can try placing the traps in locations with fewer frogs present? For example, in more elevated places to try avoid animals entering the traps.