We are a diverse team of people from different backgrounds who honor each others’ differences. We consider ourselves to be on the frontlines of important change.

This change starts with the ecological values we bring to every project, and carries over into a range of volunteer and pro-bono work to serve our community. Some of these projects include:

insight garden program

Billy began volunteering with IGP in 2015 as he was starting the company. As Miridae grew, the company became involved in helping design prison gardens collaboratively with inmates and lead on the logistics, material sourcing and installation of the gardens. To date, Miridae has taken a pro-bono lead role in the design and installation of 5 gardens in Northern California.

Native gardens connect people to nature. In the bleak conditions within prisons, connections to the outside world are rare and engagement through gardening is a powerful force of rehabilitation.

prison garden.jpg
Insight Garden Program.jpg

Could the solution to prison rehabilitation be hiding in a garden? IGP facilitates an innovative curriculum combined with vocational gardening and landscaping training so that people in prison can reconnect to self, community, and the natural world.

California native Grasslands Association

Billy has served on the board of directors since 2016. His roles have included chair of outreach, organizing workshops about native landscaping and curating and writing for a native landscaping column in CNGA’s quarterly publication Grasslands. Check out cnga.org for more information on the beauty and importance of native grasslands in CA.

Summer 2017 Newsletter: p.17: Native Landscaping Snapshots

Fall 2017 Newsletter: p.14: Sticky Plants in Your Garden

Winter 2018 Newsletter: p.14: Creating Structured Native Meadows for Landscapes


The Garden Conservancy Award – A Garden that Ages Well honors a garden that exhibits a strong design idea that will mature gracefully, demonstrating the ability of a garden, as a living work of art and horticulture, to absorb, orchestrate, and take advantage of ongoing change and growth as it moves into the future.

American Horticultural Society Award

Design by Atlas Labs

Design by Atlas Labs

Miridae donated labor and tools to assist Habitat for Humanity and other partners in creating a new landscape at the residence of Stephon Clark’s grandparents.


Billy has studied the ecological and evolutionary interactions between plants and insects since his sophomore year at Brown University. He completed his PhD at UC Davis in 2015 and briefly worked as a post-doctoral scholar at the University of Arizona before running Miridae full-time.

Ongoing scientific research on the native plants we use and the interactions they have with native insects as well as new research projects aimed at shifting decisions made by industry professionals and regulators into ones with more sustainable outcomes. Billy remains an active researcher, publishing multiple peer-reviewed articles each year and building collaborations between ecologists and landscape architects.


VanWyke J, Krimmel BA, Crova L and Pearse IS (in press). Plants trap pollen to feed predatory arthropods as an indirect defense against herbivory. Ecology.

Krimmel BA and Morse, DH (2019). Host-size decisions of female parasitoid wasps seeking hosts. Ecological Entomology 44(4):552-559

Krimmel BA (2018) Native Landscaping and Metapopulations: Thinking beyond the individual garden. Grasslands 28(4):3-5

LoPresti EF, Krimmel BA and Pearse IS (2018) Entrapped carrion increases indirect plant resistance and intra‐guild predation on a sticky tarweed. Oikos 127(7):1033-1044. PDF

Krimmel BA & Kiers H (2018) Creating Structured Native Meadows for Landscapes. Grasslands 28(1): 14-17

LoPresti EF, Robinson MR, Krimmel BA & Charles GK (2018) The sticky fruit of manzanita; potential functions beyond epizoochory. Ecology 99: 2128-2130. PDF

Krimmel BA (2017) Sticky Plants in your Garden. Grasslands 27(4): 14-16

Krimmel BA (2017) Announcing a new Grasslands Series: Native Landscaping Snapshots. Grasslands 27(3): 17-20

Krimmel BA & Pearse IS (2016) Tolerance and phenological avoidance of herbivory in tarweed species. Ecology 97(5):1357-1363

Wheeler AG & Krimmel BA (2015) Mirid (Heteroptera) specialists of sticky plants: Adaptations, Interactions, and Ecological Implications. Annual Review of Entomology 60:393-414. PDF

Krimmel BA & Wheeler AG (2014) Host plant stickiness disrupts novel ant-mealybug association. Arthropod-Plant Interactions 9(2):187-195. PDF

Krimmel BA & Pearse IS (2014) Generalist and sticky plant specialist predators effectively suppress herbivores on a sticky plant. Arthropod-Plant Interactions 8(5):403-410. PDF

Krimmel BA (2014) Why plant trichomes might be better than we think for predatory insects. Pest Management Science 70(11):1666-1667. PDF

Wheeler AG & Krimmel BA (2014) Kleidocerys obovatus Van Duzee (Hemiptera: Lygaeidae: Ischnorhynchinae): New Distribution Records and Habits of an Apparent Seed Specialist on Cypress, Hesperocyparis spp. (Cupressaceae) Proceedings of the Entomological Society of Washington 116 (2), 203-207. PDF

Krimmel BA, Pearse IS (2013) Sticky plant traps insects to enhance indirect defense. Ecology Letters (2) 219- 224. Highlighted in Nature 492:314-315; summarized in Kew Magazine, Pacific Horticulture, Big Science Little Summaries, F1000 Recommended Reading. PDF

Wheeler AG Jr., Krimmel BA (2012) Banasa sordida (Uhler) (Hemiptera: Pentatomidae): Monterey cypress and Gowen cypress (Cupressus macrocarpa, C. goveniana; Cupressaceae) as host plants in coastal California. Proc. Entomol. Soc. Wash. 114: 263–68. PDF

Krimmel BA (2011) Omnivorous insects: evolution and ecology in natural and agricultural systems. Nature Education Knowledge 4(9):4. 

Rosenheim JA, Parsa S, Forbes AA, Krimmel WA, Law YH, Segoli M, Segoli M, Sivakoff FS, Zaviezo T, Gross K (2011) Ecoinformatics for integrated pest management: expanding the applied insect ecologist’s tool-kit. J. Econ. Entomol. 104: 331–42. PDF

Forbes AA & Krimmel BA (2010) Evolution is change in the inherited traits of a population through successive generations. Nature Education Knowledge 1(10): 6.


Billy has given numerous presentations on his research and regularly guest-lectures at American River College and UC Davis. You can see him speaking at CSU Chico here.