Important insect localities may easily be overlooked in ordinary conservation plans. Odonata, ant guests, and soil insects illustrate three different approaches to their conservation. Odonata diversity can be limited by access to specific wetland or pond habitats, but their habitat demands can sometimes be restored. Ant guests depend fully on the long-term survival of their ant host species, which again depends on the preservation of sufficient habitat area. Soil insects may depend on a combination of specific soil types, vegetation, and climate for their larval development. Entomologists have a responsibility to identify critical ecological parameters for threatened insect species and to suggest tailored rescue plans.