The wind was whipping across a dark, open field near the southern edge of Yolo County when two small burrowing owls suddenly burst into flight. For a team of birders from UC Davis, the birds marked the 173rd species of the day, breaking a county record that had stood for 25 years.

It was the exciting conclusion of their “Big Day,” a fast-paced birding challenge to find and identify as many bird species as possible in a 24-hour period. Their effort – spanning 150 miles of driving, 17 miles of walking and 41 carefully planned stops – combined careful planning with a love of birds.