CDFW Completes 2025 Waterfowl Breeding Population Survey
July 25, 2025
The California Department of Fish and Wildlife (CDFW) has completed its 2025 waterfowl breeding population survey. The results of the survey show both mallard and total duck species have increased this year.
The breeding population of mallards increased from 177,828 to 265,640 (a 49% increase), and total ducks (all species combined) increased from 373,864, to 474,495 (a 27% increase). Mallards remain below the long-term average by 16%.
“The survey indicated an increase in mallard abundance, and habitat conditions were good in northern California, so we expect average to above-average production for all waterfowl species,” said CDFW Waterfowl Program Biologist Melanie Weaver.
Since 1948, CDFW biologists and warden-pilots have conducted this survey annually using fixed-wing aircraft. The population estimates are for those areas where the vast majority of waterfowl nesting occurs in California, including wetland and agricultural areas in northeastern California, throughout the Central Valley, the Suisun Marsh and some coastal valleys.
The complete 2025 California Waterfowl Breeding Population Survey Report (PDF) is available at the CDFW website.
The majority of California’s wintering duck population originates from breeding areas surveyed by U.S. Fish and Wildlife Service (USFWS) in Alaska and Canada, and these results should be available by late August. CDFW survey information, along with similar data from other Pacific Flyway states, is used by the USFWS and the Pacific Flyway Council when setting hunting regulations for the Pacific Flyway states, including California.
###
Media Contacts:
Melanie Weaver, CDFW Wildlife Branch, (916) 502-1139
Peter Tira, CDFW Communications, (916) 215-3858
