11K views · 573 reactions | How do you define the term "spring peeper" ? 1⃣ Any frog I hear in the spring 2⃣ Anything peeping in the spring 3⃣ Pseudacris crucifer 4⃣ Any frog, I am chaotic and possibly evil 5⃣ Stop it, I live in the west  Megan Seymour/USFWS. A spring peeper's vocal sac inflates as it makes several short "peep" calls. | U.S. Fish and Wildlife Service | Facebook