Saturday, 22 July 2017

A mallard drake takes flight from calm waters
Credit: USFWS

July 14, 2017 - The California Department of Fish and Wildlife (CDFW) has completed its annual waterfowl breeding population survey.

The breeding population of mallards decreased from 263,774 to 198,392 (a decrease of 25 percent) and total ducks decreased from 417,791 to 396,529 (a decrease of five percent).

The decline was not expected, given the abundant precipitation. Low duck observations could be attributed to winter flooding of nesting habitat and the late flooding of rice in the Sacramento Valley.

CDFW biologists and warden pilots have conducted this annual survey using fixed-wing aircraft since 1948. The population estimates are for the surveyed areas only, which include the majority of the suitable duck nesting habitat in the state. Surveyed areas include wetland and agricultural areas in northeastern California, throughout the Central Valley, the Suisun Marsh and some coastal valleys.

The full Breeding Population Survey Report is can be found at www.wildlife.ca.gov/conservation/birds/waterfowl.

The majority of California’s wintering duck population originates from breeding areas surveyed by the U.S. Fish and Wildlife Service (USFWS) in Alaska and Canada. Those survey results should be available in early 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.
Source: CDFW
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