About PABS

The Pennsylvania Biological Survey (PABS) is a nonprofit, all-volunteer organization whose purpose is to increase knowledge of, and foster the perpetuation of, the natural biological diversity of the Commonwealth of Pennsylvania. Among other tasks, the Survey is responsible for determining the status (endangered, threatened, etc.) of wild species of animals, plants and other organisms in the state (click HERE to see how that’s done). Its over 150 members (including more than 70 PhDs) are scientists from throughout Pennsylvania, representatives of state and federal agencies concerned with natural resource management, representatives of Pennsylvania’s major natural history museums and scientific institutions, and other interested and knowledgeable individuals. PABS is governed by a Steering Committee that functions through technical and standing committees focusing on species groups or program areas. To learn more, click on the links at left.

Monongahela crayfish Cambarus monongalensis ©Roger Earl Lathamnortheastern bulrush Scirpus ancistrochaetus ©Arthur Hainesgolden-winged warbler Vermivora chrysoptera ©www.briansmallphoto.combog turtle Glyptemys muhlenbergii George Grall ©National Aquariumnorthern long-eared bat Myotis septentrionalis ©Phil SwansonLoyalhanna lichen ©James ShaulisAmerican globeflower Trollius laxus ©Ann F. Rhoads 2Chesapeake logperch Percina bimaculata ©Rob Criswellflypoison bulb-borer moth Papaipema sp. 1 ©Roger Earl Lathamwood thrush Hylocichla mustelina ©Ed Schneider www.edschneiderphotography.comshorthead garter snake Thamnophis brachystoma ©David BadgerVirginia mallow Sida hermaphrodita ©Jim McCormacWyandot grizzled skipper Pyrgus centaureae wyandot © Jeffrey S. Pippenscarlet tanager Piranga olivacea www.animalspot.netmountain chorus frog Pseudacris brachyphona ©Paul Sattler Virginia Herp SocKates Mountain clover Trifolium virginicum ©Roger Earl Lathamtimber rattlesnake Crotalus horridus ©Richard SandersonAllegheny woodrat Neotoma magister ©Cal Butchkoskiworm-eating warbler Helmitheros vermivorum ©Danny Bonillaserpentine aster Symphyotrichum depauperatum ©Roger Earl Lathameastern regal fritillary Speyeria idalia idalia ©Bill Boutoncheckered sculpin Cottus n.sp. ©Rob Criswellspreading rockcress Arabis patens ©John R. Gwaltney www.southeasternflora.comcrayfish Cambarus (Puncticambarus) sp. ©Jim Fetznerhellbender Cryptobranchus alleganiensis ©Mike PinderHenslow’s sparrow Ammodramus henslowii ©Howard B. Eskinlichen Opegrapha bicolor ©James LendemerSnetsinger's purseweb spider Atypus snetsingeri ©Marie L. Schmidtglade spurge Euphorbia purpurea ©Alan Cresslernorthern coal skink Eumeces anthracinus ©David Badgertundra swan Cygnus columbianus ©Willard C. Hillfreshwater pearl mussel Margaritifera margaritifera Joel BerglundAmerican climbing fern Lygodium palmatum Lucien Taylor ©NE Wildflower Socgreen-faced clubtail Gomphus viridifrons ©Jeffrey S. Pippenstreamline chub Erimystax dissimilis ©Rob Criswellcerulean warbler Dendroica cerulea Wikimedia Commonsisopod Caecidotea kenki ©W. K. JonesMonongahela Barbara’s-buttons Marshallia pulchra Wikimedia Commons

Hover the cursor over an image to pause on it. To learn more about Pennsylvania-responsibility species or view the images one at a time, click HERE.

© Pennsylvania Biological Survey 2020
     Webmaster: Roger Latham