These can be further broken down into nymphs, terrestrials, dry flies, eggs, scuds, and streamers. Most are sympodial epiphytes, or rarely terrestrials. Most species in the Oncidium genus are epiphytes, although some are lithophytes or terrestrials. They may be epiphytes, terrestrials or growing as lithophytes on damp rocks. The four outer planets are giant planets, being substantially more massive than the terrestrials. A few species grow as terrestrials or even as lithophytes in open, humid habitats. They run witness support groups for those who believe they have encountered extra terrestrials. Terrestrials are prominent in late summer. Upon its release, "Terrestrials" received positive reviews from music critics.