This list of insects and other organisms at Calamus Swamp is organized alphabetically by scientific name.
| Scientific Name | Common Name |
| Ablabesmyia peleensis | A non-biting midge |
| Acilius sp. | Genus of diving beetles |
| Acricotopus sp. | Genus of non-biting midges |
| Aedes sp. | Genus of mosquito |
| Aeshna umbrosa | Shadow Darner (dragonfly) |
| Aeshnidae | Genus of darners (dragonflies) |
| Agabetes acuductus | A predaceous diving beetle |
| Agabus disintegratus | Disintegrated Diving Beetle |
| Agabus sp. | Genus of predatory diving beetles |
| Agrypnia sp. | Genus of the “Giant Casemaker” caddisflies |
| Anax junius | Green darner (dragonfly) |
| Asellus sp. | Aquatic Sowbug |
| Belostoma sp. | Genus of Giant Waterbugs |
| Berosus sp. | Genus of aquatic beetles |
| Buenoa sp. | Genus of small backswimmers |
| Caecidotea sp. | Genus of small freshwater crustaceans |
| Callibaetis sp. | |
| Cambarus diogenes | Common Burrowing Crawfish |
| Celina sp. | Genus of predaceous diving beetles (family Dytiscidae) |
| Cercaria sp. | Fluke |
| Certopogonidae | |
| Chaoborus sp. | |
| Chauliodes rastricornis | Spring Fishfly |
| Chironomidae | |
| Chironomus (C.) decorus group | |
| Chironomus (C.) staegeri group | |
| Chironomus (Chaetolabis) sp. | |
| Chironomus (Lobochironomus) longipes | |
| Chlorella sp. | Plankton Alga |
| Chlorohydra viridissima | Hydra |
| Chrysops sp. | |
| Cladocera | |
| Cladophora sp. | Filamentous Alga |
| Coenagrionidae | |
| Copelatus sp. | |
| Copepoda | |
| Coptotomus sp. | |
| Corynoneura n.sp4 | |
| Crangonyx sp. | |
| Crangonyx sp. | Scud |
| Cybister fimbriolatus | |
| Cyclops vernalis | Spring Copepod |
| Diaptomus stagnalis | Red Copepod |
| Dineutus sp. | |
| Dytiscus sp. | |
| Endochironomus nigricans | |
| Enochrus sp. | |
| Erpobdella punctata | |
| Erpobdella punctata punctata | |
| Erythemis simplicicollis | |
| Eubranchipus vernalis | |
| Eubranchipus vernalis | Ohio Fairy shrimp |
| Fossaria sp. | |
| Gomphonema sp. | Diatom |
| Graphoderus sp. | |
| Gyraulus parvus | |
| Gyraulus sp. | |
| Haemopis marmorata | |
| Haemopis sp. | Horse Leech |
| Haliplus sp. | |
| Helisoma anceps anceps | |
| Helisoma trivolvis | Common Ramshorn Snail |
| Helobdella sp. | White Leech |
| Helobdella stagnalis | |
| Hesperocorixa sp. | |
| Hydaticus sp. | |
| Hydaticus sp. | Predaceous Diving Beetle |
| Hydra sp. | Hydra |
| Hdracarina | |
| Hydrellia sp. | |
| Hydrocanthus sp. | |
| Hydrochara sp. | |
| Hydrophilus sp. | |
| Hydroporus sp. | |
| Hygrotus sp. | |
| Ilybius sp. | |
| Ischnura sp. | |
| Kiefferulus sp. | |
| Laccophilus sp. | |
| Larsia sp. | |
| Lestes sp. | |
| Lestidae | |
| Lethocerus sp. | Giant Water Bugs |
| Limnephilus sp. | Caddisflies |
| Limnophyes sp. | |
| Lymnaea sp. | Pond Snail |
| Lynceus brachyurus | |
| Matus sp. | |
| Menetus (Micromenetus) brogniatianus | |
| Menetus exacuous | |
| Musculium partumeium | Swamp Fingernail Clam |
| Myxosargus sp. | |
| Navicula sp. | Diatom |
| Neoplea sp. | |
| Notonecta sp. | |
| Notonectidae | |
| Odontomyia (0.) sp. | |
| Oligochaeta | |
| Orthocladiinae | |
| Ostracoda | |
| Pachydiplax longipennis | |
| Parachironomus carinatus | |
| Parachironomus sp. | |
| Paracymus sp. | |
| Paratanytarsus sp. | |
| Pelocoris sp. | |
| Peltodytes sp. | |
| Physa sp. | Pouch Snail |
| Physella sp. | |
| Pisidium casertanum | Ubiquitous Pea Clam |
| Placobdella ornata | |
| Placobdella papillifera | Leech |
| Planorbella (Pierosoma) pilsbryi | |
| Placobdella sp. | Blood-sucking Leech |
| Plea striola | Pigmy Backswimmer |
| Polypedilum (p.) trigonus | |
| Promenetus exacuous | |
| Psectrocladius (Allopsectrocladius) sp. | |
| Psectrotanypus dyari | |
| Ranatra sp. | |
| Riccia fluitans | Slender Riccia |
| Ricciocarpus natans | Purple-fringed Riccia |
| Scirtidae | |
| Sigara sp. | |
| Sphaerium occidentale | |
| Sphaerium sp. | |
| Spongilla lacustris | |
| Stagnicola sp. | |
| Sympetrum sp. | Diatom |
| Synedra sp. | |
| Tanypodinae | |
| Tanypus carinatus | |
| Tanypus sp. | |
| Tanypus “punctipennis” (sensu Roback, 1977) | |
| Thermonectus sp. | |
| Tribonema sp. | Filamentous alga |
| Trichocorixa sp. | |
| Tropisternus sp. | |
| Turbellaria | |
| Vaucheria sp. | Filamentous alga |
| Volvox globator | Volvox |