Varmints! opens each episode by lowering expectations, then spends the rest of it working to beat them. The cast repeat the same premise every time: they are not animal experts, and they intend to do their best to learn alongside the listener. It is an honest framing, and it shapes how the show sounds. Nobody is lecturing from a podium. Instead, people who did the reading report what they found. The frog episodes collected under 'A Frog a Day', a special series for National Podcast Posting Month, show how many shapes that reporting can take. Some are solo species profiles from Moss, billed as Science Dude. The Wallace's flying frog profile covers a frog that can glide 15 meters or more. It also covers a female that beats fluid into a foam nest with her hind legs, whipped up like meringue, before the tadpoles drop from the branches into the water below. It also notes that the species is listed as least concern on the IUCN Red List. The American green tree frog profile opens on a pun, then turns to males that eavesdrop on their neighbors, adjust their calls to compete, and sometimes fall silent to intercept a rival's signal. Other episodes bring in an outside voice. Henry Adams, MS, of the Lincoln Park Zoo, appears across a four-part interview series that runs from ranids, the so-called true frogs, to how many North American places are named Frogtown. A question about whether all frogs are edible gets a firm no, because many would make a person sick. The cast discussion of an article titled 'How Genes Can Leap from Snakes to Frogs in Madagascar' is where the show's candor pays off. One cast member admits the article never explained how the gene actually makes the jump, and the transposon at its center gets called a grifter. In 'Wrap-up Chat with Henry the Herpetologist!', Donna, Moss, Kurt and Henry trade what stayed with them. There is a zombie frog, named because its discoverer, Raphael Ernst, thought fellow researchers climbing out of the pit where they dug for the frogs looked like zombies. A cast member recalls a segment on the Suriname toad, which keeps its eggs under the mother's skin, and sets it against frogs that incubate in their mouths, on leaves or in funnel plants. Not every loose end gets tied: someone admits they still have not worked out what the zombie frog's scientific name translates to. The humor stays nerdy and affectionate, with words like 'fantabulous' and one creature summed up as 'a mouth with feet'. The same sign-off, be nice to animals, recurs across the series. For a first listen, a species profile shows the show's fact-driven side, and the wrap-up chat brings the cast and their guest together.