Encyclopedias, Almanacs, Transcripts, and Maps
- Spawning Aggregations
- Special Use Permit
- Species Introduction
- speedwell
- Spektor, Yitsḥaq Elḥanan
- Spelaeogriphacea (Spelaeogriphaceans)
- Spells
- Spencer, Herbert
- Sperm Whales (Physeteridae)
- Sphenisciformes (Penguins)
- Sphenodontia Tuatara (Sphenodontidae)
- spherical trigonometry
- spider monkey
- spiny anteater
- Spiny Rats (Echimyidae)
- Spirit Possession
- Spirit Possession: An Overview
- Spirit Possession: Women and Possession
- Spiritual Discipline
- Spiritual Guide