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Theresa Crimmins

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Director, USA National Phenology Network, University of Arizona

A volunteer looks for waterbirds at Point Reyes National Seashore in California during the National Audubon Society’s annual Christmas Bird Count. Kerry W/Flickr

February 3, 2021

Citizen scientists are filling research gaps created by the pandemic

Theresa Crimmins, University of Arizona; Erin Posthumus, University of Arizona, and Kathleen Prudic, University of Arizona

COVID-19 kept many scientists from doing field research in 2020, which means that important records will have data gaps. But volunteers are helping to plug some of those holes.

Yellow trout lily flowers nearly a week earlier now than in previous decades in the Appalachian Mountains. Katja Schulz/Wikipedia

March 5, 2020

Spring is arriving earlier across the US, and that’s not always good news

Theresa Crimmins, University of Arizona

Climate change has advanced the arrival of spring by as much as several weeks in some parts of the US. This can mean major crop losses and disconnects between species that need each other to thrive.

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Location: Tucson, Arizona, U.S.
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Joined October 30, 2019