As the title suggests, I'm trying to determine if Swarm Monger's are eligible for an improved familiar. For example, at level 5, I would want to look into changing to a Stirge familiar, which has its own swarm associated with it.
Is this feasible? The swarm monger archetype says the druid must choose from a list of fecund familiars, but doesn't really specify if you can improve it later. Any help is appreciated.