Super-elongated katydid nymph (Tettigoniidae) from Belize.
Roesel's Katydid nymph (Tettigoniidae: Tettigoniinae, Metrioptera roeselii) from Iowa. Members of this subfamily are also called 'shield-backed katydids' thanks to their unique pronota.
Large katydids (Tettigoniidae) were a common sight in Costa Rica. These robust herbivores don't take kindly to being handled and can deliver a surprisingly strong pinch with their powerful mandibles.