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Research & Collections Photo Gallery

These images are solely for use by the working press to illustrate a story about the Academy of Natural Sciences. All other potential uses must be cleared through the Communications Office.

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Delaware River Watershed Initative

  • Two scientists in leafy Cobbs Creek. Photo by Tess Hooper
    Academy scientists sample algae on Cobbs Creek near Bethlehem, Pa., as part of the Delaware River Watershed Initiative.
    Credit: Tess Hooper
  • Horse farm at stream. Photo by ANS
    Farm fertilizers and animal waste flowing into streams can cause problems in the Delaware River Watershed.
    Credit: ANS
  • Scientist with measuring tape
    Academy Research Technician Amanda Chan and Staff Scientist II Sylvan Klein conduct a habitat assessment for a salamander biological survey of the Lehigh River near East Stroudsburg, Pa. Salamanders are key indicators of water quality.
    Credit: Nikita Shah/ANS
  • Measuring stream depth
    Drexel University co-op student Nikita Shah evaluates habitat conditions of a stream in the Poconos, Pa., for potential sampling as part of the Delaware River Watershed Initiative.
    Credit: Meg O’Donnell/ANS
  • Collecting fish in stream
    Academy scientists return to Cobbs Creek near Havertown, Pa., every other year to monitor fish populations and species abundance for a long-term survey. Here they are electrofishing to capture and then release fish.
    Credit: Sylvan Klein/ANS


  • Ted Daeschler holding dimetron jaw.
    Ted Daeschler, PhD, the Academy’s vice president for collections, holds a cast of the jaw specimen.
  • Dimetron illustration by Danielle Dufault/Royal Ontario Museum
    A depiction of Dimetrodon with the section of jaw that is now fossilized and a part of the Academy’s collection highlighted. Drawing by Danielle Dufault, Royal Ontario Museum.
  • Dimetron lithograph
    A lithograph of the fossil from around the time it originally made its way to the Academy’s collection.
  • jaw and scan. Photo courtesy Kirsten Brink
    The Dimetrodon fossil, left, with the CT scan of it used by the Canadian research team. Photo courtesy Kirsten Brink.

Rare Butterfly

  • Live Gynandromorph
    The live Lexias pardais was a shocking delight when it was spotted in the Academy’s Butterflies! exhibit.
    Credit: Isa Betancourt/ANSP

  • Lexias paradalis specimen
    The right wings of this preserved Lexias pardais are characteristic of the female of the species and the left wings are typical of the male. The body’s coloration is exactly split down the middle lengthwise.
    Photo J.D. Weintraub/ANSP Entomology

  • Chris Johnson, Jason Weintraub, butterfly
    Academy volunteer Chris Johnson (left), here with entomologist Jason Weintraub and the preserved Lexias pardais, couldn’t believe his eyes when he first spotted the rare butterfly in the Butterflies! exhibit.
    Credit: Doug Wechsler/VIREO

  • Dr. Marina Potapova collects diatoms, single-celled algae.
    Credit: ANSP

  • Dr. Clyde Goulden interviews nomadic herders in Monglia who are affected by climate change.
    Credit: Tuya Goulden
  •  Fisheries scientist David Keller examines a fish for environmental toxins.
    Credit: Bruce Tepper/ANSP


  • Dr. Nate Rice showing a hummingbird specimen from the Ornithology collection to visiting students.
    Credit: Dennis Murphy/ANSP



  • Entomologist Isabelle Betancourt with a cicada specimen from the Academy’s world-renowned Entomology Collection of about 4 million specimens.
    Credit: ANSP