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Who We Are

Brett Marshall

Brett Marshall, Ph.D. Ecology

President/ CEO/ Principal Scientific Investigator

Brett has been the "Bug Guy" since his tenure at the Academy of Natural Sciences of Drexel University. He is a specialist in aquatic ecology (>30 years) and the founder of River Continuum Concepts, Inc. He has worked with species of conservation concern, including both terrestrial and aquatic invertebrates. His specialty is developing project specific monitoring criteria for aquatic and terrestrial ecosystems. Brett's favorite bug is Yoraperla because he worked with thousands of peltoperlids during his master's thesis and he still has a soft spot for this cute little bug. Additionally, they are usually abundant in beautiful, small undisturbed mountain streams.


Yoraperla, a genus of roach-like stoneflies from the family Peltoperlidae.

Education & Certifications:

The kind of environment Yoraperla is found in...

Merle Roberts

Merle Roberts, Taxonomic Coordinator

Taxonomic Coordinator

Merle has >14 years of field and laboratory experience. He is certified by the Society for Freshwater Science for Identification of macroinvertebrates. Merle's favorite bug is Helicopsyche borealis.


Helicopsyche borealis, a species of caddisfly from the family Helicopsychidae that make an opulent snail shaped case from jewel like sands.

Conner Bailey

Conner Bailey


Conner the Eagle Scout came to work in our laboratory after completing his degree in Environmental Sciences in 2015. He is a wizard with fractions. Conner's favorite bug is Daphnia galeata mendotae.


Daphnia galeata mendotae, a highly variable water flea that is a filter feeder.

Angel Lawellin

Angel Lawellin, Project Coordinator

Project Coordinator

Angel has managed the laboratory, scheduling, budgeting, and preparation of microscopy samples since 2012. Angel's favorite bug is Tanypus neopunctipennis.


Tanypus neopunctipennis, from the sub-family Tanypodinae. Tanypods are commonly known as predators, however we found that this species is a facultative grazer of epiphytic Super close-up of Tanypus diatoms.