Recent accomplishments of CDFW's scientific community
CDFW Seasonal Aid Katie Schroyer determines the age of a dove by examining its wing
A banded mourning dove at a CDFW trap site in northern California
Age and sex data are recorded before the bird is banded and released.
A large kennel trap can catch more than 30 birds at a time.
As the second half of California’s split dove season kicks off, dove hunters may put more than birds in their bags. They may harvest a bird with a band on its right leg – thus getting an opportunity to contribute important data that will help guide future management efforts.
Since 2003, California has been an active partner in a nationwide assessment of mourning dove populations. California is one of 39 states that currently participate in dove banding. During the months of July and August, trained biologists and volunteers trap and band doves throughout the state. The banding of migratory birds requires a Master Banding Permit issued upon approval of a study application by the U.S. Geological Survey. All banders must pass an annual training to participate and are then issued a sub-permit.
Mourning doves are so widely distributed that banding operations can be – and are – located almost anywhere, from rural locations to urban backyards. Larger operations located on Wildlife Areas, ranches and open desert sites may employ the use of a large kennel trap capable of trapping 30 or more birds at a time, while smaller operations (“backyard banders”) use small Kniffin traps that catch just one or two birds at a time.
When a bird is banded, age and sex data are recorded. This information, along with capture location, date, bander name and corresponding band number, becomes part of a massive database managed by the USGS’s Bird Banding Laboratory. The mourning dove banding data is available to any interested party, but is mainly used by the U.S. Fish and Wildlife Service (PDF), university scientists and state agency scientists to analyze and estimate annual survival, harvest rates, recruitment and abundance.
The resulting analysis is used by wildlife managers in setting annual hunting regulations. For instance, in 2015, the USFWS increased the take of mourning doves in the Western Management Unit (which includes the states of California, Oregon, Washington, Idaho, Nevada, Utah and Arizona) from a daily bag limit of 10 to 15. The California Fish and Game Commission followed suit, also increasing the possession limit from two to three times the daily bag limit, in order to accommodate hunters on multi-day hunting trips.
If you harvest or find (encounter) a banded bird, CDFW asks that you report the number directly to the Bird Banding Laboratory. This can be done online at www.reportband.gov, or by calling (800)327-2263. When reporting an encounter you will be asked for the band number and basic information about where and how you obtained the band.
The person reporting is allowed to keep the band, and will receive a certificate with the details about where, when and by whom the bird was banded.
The USGS Bird Banding Lab is the keeper of banding data for both the US and Mexico. As of September 18, 2017 and since 1960, the BBL has received over 64 million banding records. Since the inception of the North American Bird Banding Program, the BBL has received over 4 million encounter records. On average, over the past decade, the BBL received 1.2 million banding and 87,000 encounter records per year.
For more information about mourning dove banding, including the 2017 Mourning Dove Harvest Strategy, visit the Doves and Pigeons page on the FWS website.
CDFW photos by Kloey Helms
Featured photo: CDFW Seasonal Aid Katie Schroyer determines the age of a dove by examining its wing.
Two doves in a backyard wire trap
A bander holds out a dove’s wing to see which feather has most recently molted, which will provide information about the age of the bird.
A volunteer trapper prepares to release a banded female.
If you have an interest in migratory upland birds – as a hunter, a birdwatcher or just a citizen scientist – there’s a unique volunteer opportunity coming up that will allow you to work hands-on with wildlife, while helping the California Department of Fish and Wildlife collect critical research data that will become part of a national database.
Approved volunteers will be specifically trained over the next few months and permitted to capture mourning doves for a seven-week period, from July 1 through August 20, 2018. Banders attach a metal leg band to each bird, determine the bird’s age and sex , and record the data before releasing the bird. Banders can choose their own trapping sites, which in many cases are on their own property.
CDFW is particularly in need of volunteers in North Coast and Bishop areas, but as this is a statewide program, volunteers from other areas may be able to participate as well.
“It’s a unique opportunity for wildlife enthusiasts to get hands-on experience and play an important role in the management of California’s number one game bird,” explains Karen Fothergill, an environmental scientist and coordinator of CDFW’s Mourning Dove Banding Program.
Several levels of participation are possible, but successful completion of a four-hour training session is mandatory for all participants. Trained volunteers will band in their local areas, ending 10 days prior to the start of the hunting season for mourning doves.
The imprinted bands that are attached to birds’ legs are an important tool used by wildlife managers to help them evaluate mourning dove populations. Band recovery data is incorporated into the US Geological Survey Bird Banding Laboratory database and used by wildlife managers to monitor the status of mourning dove populations.
Together, the volunteer force will band approximately 4,000 mourning doves around the state. This number – which is necessary for accurate population modeling – has only been achieved with the use of volunteers.
Volunteer training opportunities will be held around the state, depending on how many potential volunteers show interest in participating, and where those individuals are located. Fothergill said that she expects to hold at least four training opportunities in the month of May. For scheduling purposes, potential volunteers are asked to contact Fothergill no later than April 13.
Volunteers are not compensated, but all supplies will be loaned at no charge.
Program participants must be over 18 and have good organizational skills and a commitment to wildlife preservation. The trapping and banding work is typically done in the morning and evening, but volunteers who can only work limited hours or on certain days can still be utilized and are welcome. For more detailed information about the program or to reserve a space at a training session, please contact Karen Fothergill at (916) 716-1461 or Karen.Fothergill@wildlife.ca.gov.
Top Photo: Mourning dove (Zenaida macroura)
The latest issue of California Fish and Game, 103-3, makes a significant contribution to the body of research related to longfin smelt in California. A paper titled, “Historic and contemporary distribution of Longfin Smelt (Spirinchus thaleichthys) along the California coast (PDF)” analyzes and presents observation data for this species from a variety of published and unpublished sources dating from 1889 to 2016. This anadromous fish, which is listed as threatened under the California Endangered Species Act, has been documented in a diverse range of habitats, including coastal lagoons, bays, estuaries, sloughs, tidal freshwater streams and nearshore habitats. In addition to providing a comprehensive look at the existing information available for longfin smelt along the California coast, this paper identifies additional information needed to improve management and enhance recovery of the species within the state.
In “Distribution and derivation of dabbling duck harvests in the Pacific Flyway (PDF),” the authors look at abundance, banding and harvest data from throughout the Pacific Flyway and other important source areas in the Central Flyway to estimate the distribution and derivation of Pacific Flyway dabbling duck harvests during 1966−2013. The Pacific Flyway has long been considered an important wintering area for dabbling ducks. Better knowledge of the origins of these birds could assist in both harvest and habitat management.
The authors of “Distribution of Amargosa River pupfish (Cyprinodon nevadensis amargosae) in Death Valley National Park, CA (PDF)” endured harsh environmental conditions to document the occurrence of Amargosa River pupfish along the lower Amargosa River drainage where the species has not been previously documented. The downstream-most location of Amargosa pupfish captured in this study extends the previously recorded geographic range approximately 49 river km. The findings not only determine the distribution of Amargosa River pupfish within Death Valley National Park, but will help identify suitable locations at which to establish long-term monitoring sites.
California Fish and Game has published high-quality, peer-reviewed science for the past 103 years, making important contributions to the understanding and conservation of California’s wildlife.
Cover photo courtesy of Gerald and Buff Corsi © California Academy of Sciences.
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