American crows are omnivorous, feeding on acorns, carrion, invertebrates, nuts and scraps of food left by humans. They are also hunters of small animals like mice and frogs. They can live in pretty much any open habitat with trees, preferably conifers and large oaks in which they like to nest. They are rarely solitary, usually traveling in extended family groups. Offspring stay with their parents a year or two to help rear siblings before setting out on their own. Small groups of 3-4 have been observed foraging on the exposed mudflats near the condominiums to the north of Salter Grove. Their raucous calls can be heard from all parts of the park as they fly overhead.
Susceptibility to the West Nile virus has caused the crow population to decline by 45% since 1999, the year that the virus was first detected in the U.S. Crows cannot transmit the virus to humans directly but affected individuals can indicate the presence of the disease in an area.