Tag Archives | zoom meetings

Proactively Manage Pests Based on Predator-Prey Ecology

Katherine Larson is a wildlife biologist with the Redding Bureau of Land Management (BLM), where she helps to make informed land management decisions that benefit birds. She hopes to grow in this position by coordinating with avian biologists along birds’ entire flyways and life cycles, and by incorporating citizen science and outdoor education on BLM land.  Prior to this position, Katherine studied wildlife biology at Humboldt State University after transferring from University of Colorado where she played NCAA softball, rock climbed and was a white-water raft guide. When not thinking about birds, Katherine can be found backpacking in the Trinity Alps, cooking and baking, or hanging out with Buddhist monks.

Research Abstract:

Ecological theory predicts that raptors exert top-down effects on their prey by direct consumption, indirectly by imposing risk of predation, or a combination of both. However, empirical evidence for these effects is mixed and inconsistent. Understanding relationships between raptors and their prey is especially important where raptors may contribute to the control of agricultural pests. Earlier work shows promise that barn owls may control rodent pests, but empirical evidence is limited and the distinction between direct and indirect effects remains unresolved. Here, we investigate the top-down effects of barn owls on rodent pests in winegrape vineyards in Napa Valley, California. We monitored barn owl occupancy, reproductive status, and fledgling success in over 300 nest boxes in 2023. We used this to create a spatially and temporally explicit barn owl hunting pressure model from hunting locations and from prey delivery rates that vary as nestlings develop. The hunting pressure layers were used to examine the direct effect of barn owls on rodent abundance (measured with chew blocks), and the indirect effect of barn owls on rodent perceived predation risk and activity (measured with giving-up density trays and game cameras respectively). We found that barn owls exert both direct and indirect effects on rodent pests and that dense vegetation favors the acoustically attuned barn owls over the visually-oriented rodent pests. We contribute to growing evidence that barn owls can be used as biological control in agricultural systems, and we show that growers can manipulate vegetation to enhance the effect of barn owls and to induce more fear in rodents.

Shasta Birding Society is inviting you to a scheduled Zoom meeting.

Topic: Proactively Manage Pests Based On Predator-Prey Ecology
Time: Nov 13, 2024 07:00 PM Pacific Time (US and Canada)

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https://us06web.zoom.us/j/88004338851

Meeting ID: 880 0433 8851

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Meeting ID: 880 0433 8851

Find your local number: https://us06web.zoom.us/u/kcrlfN8Lk9

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Cavity Nesting Birds and Nestbox Monitoring

Larry Jordan has been enthralled with birds since he spotted a Burrowing Owl in his Oak Run driveway on the way home one evening over 30 years ago. He didn’t know what the bird was so he bought his first field guide and opened up a whole new world of wonder. Since that evening he has been involved in several endeavors to protect birds and advance the joy of birding. He started his own birding blog in 2007 and also posted to the well known 10000 Birds blog. Larry joined Wintu Audubon Society, became the webmaster for the organization, and began photographing birds in 2008. There are 85 species of cavity-nesting birds in North America (excluding Mexico) and 72 of them occur in the western United States. So, please join our webmaster as he discusses the joys of monitoring cavity nesting birds. He will discuss nest box design and highlight some of his favorite cavity nesting bird photos and videos from the last fifteen years.

Shasta Birding Society is inviting you to a scheduled Zoom meeting.

Topic: Cavity Nesting Birds and Nestbox Monitoring
Time: Sep 11, 2024 07:00 PM Pacific Time (US and Canada)

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https://us06web.zoom.us/j/84112964959

Meeting ID: 841 1296 4959

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Meeting ID: 841 1296 4959

Find your local number: https://us06web.zoom.us/u/kbbdvn5Zb

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Status of the Tricolored Blackbird and Yellow-billed Magpie

Tricolored Blackbird by David Bogener

Tricolored Blackbird by David Bogener

This month Dan Airola will provide recent status information on the Tricolored Blackbird and Yellow-billed Magpie, two Central Valley species that have declined substantially in recent years. Blackbird population loss has resulted from habitat loss, nest destruction during agricultural harvest, and loss of insect prey due to insecticide use. The successful proposal to list the species under the state Endangered Species Act sparked research and conservation programs. Dan recounts this recent history and the successful efforts that have resulted in modest but important population increase. The population of the state-endemic Yellow-billed Magpie declined by over 80% in California since the arrival of West Nile virus in the early 2000’s, and did not develop resistance, unlike some other species. Dan’s recent studies reveal key habitat relationships and an apparent incipient recovery in the sizable urban Sacramento population.

Dan Airola is a Wildlife Biologist and Ornithologist who has worked for over 40 years in research and conservation of at-risk species birds in Northern California. In addition to long-term research on the tricolor and magpie, Dan maintains a 30-year study of Sacramento’s Purple Martins and has also studied Swainson’s Hawks, Turkey Vultures, Osprey, fire-adapted forest species, migrant songbirds, and diving ducks. Dan also serves the Central Valley Bird Club as a Director, Conservation Chair, and editor of the journal Central Valley Birds.

Wintu Audubon Society is inviting you to a scheduled Zoom meeting.

Topic: Status of the Tricolored Blackbird and Yellow-billed Magpie
Time: Nov 8, 2023 07:00 PM Pacific Time (US and Canada)

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https://us06web.zoom.us/j/84935959479

Meeting ID: 849 3595 9479

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• +1 346 248 7799 US (Houston)
• +1 312 626 6799 US (Chicago)
• +1 360 209 5623 US
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• +1 929 205 6099 US (New York)
• +1 301 715 8592 US (Washington DC)
• +1 305 224 1968 US
• +1 309 205 3325 US

Meeting ID: 849 3595 9479

Find your local number: https://us06web.zoom.us/u/kdLugm8lor

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Some of My Favorite Bird Photos

Larry Jordan has been enthralled with birds since he spotted a Burrowing Owl in his Oak Run driveway on the way home one evening over 30 years ago. He didn’t know what the bird was so he bought his first field guide and opened up a whole new world of wonder. Since that evening he has been involved in several endeavors to protect birds and advance the joy of birding. He started his own birding blog in 2007 and also posted to the well known 10000 Birds blog. Larry joined Wintu Audubon Society, became the webmaster for the organization, and began photographing birds in 2008. Please join our webmaster as he highlights some of his favorite bird photos from the last fifteen years. Don’t be surprised if there may be a few short videos as well.

His photographs are available on his Flickr site here: https://www.flickr.com/photos/soaringfalcon/

His youtube channel is here: https://www.youtube.com/@LarryJordanWildlifeAdvocate/videos

His blog is here: https://thebirdersreport.com/

Wintu Audubon Society is inviting you to a scheduled Zoom meeting.

Topic: Some of Larry Jordan’s favorite bird photos.
Time: Sep 13, 2023 07:00 PM Pacific Time (US and Canada)

Join Zoom Meeting
https://us06web.zoom.us/j/89075919908

Meeting ID: 890 7591 9908

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+12532158782,,89075919908# US (Tacoma)

Dial by your location
• +1 253 205 0468 US
• +1 253 215 8782 US (Tacoma)
• +1 346 248 7799 US (Houston)
• +1 669 444 9171 US
• +1 669 900 6833 US (San Jose)
• +1 719 359 4580 US
• +1 312 626 6799 US (Chicago)
• +1 360 209 5623 US
• +1 386 347 5053 US
• +1 507 473 4847 US
• +1 564 217 2000 US
• +1 646 931 3860 US
• +1 689 278 1000 US
• +1 929 205 6099 US (New York)
• +1 301 715 8592 US (Washington DC)
• +1 305 224 1968 US
• +1 309 205 3325 US

Meeting ID: 890 7591 9908

Find your local number: https://us06web.zoom.us/u/kCr86cZNJ

 

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Northern Saw-whet Owl Monitoring Project

Northern Saw-whet Owl

Redbud Audubon Society is presenting a Zoom program this Thursday, Jan. 21 at 7 p.m. entitled Northern Saw-whet Owl Monitoring Project. These little birds are all around us, year-round, fighting out their fierce lives in our forests and woodlands. Enjoy learning about these neighbors from Ken Sobon, director of the Northern Saw-whet Owl Research and Education Project in Northern California.

To join Redbud Audubon on Zoom for this program, please register by going to www.redbudaudubon.org, click on the newsletter link on the homepage and use the link on page one of the newsletter to connect to a registration form. Complete the form, click submit, and the host will send you the link to the meeting. Please register by Wednesday, Jan. 20. It’s a very simple procedure and allows the host to more efficiently monitor the meeting. You can also click on the registration link here: https://forms.gle/2tDTM1gpp4CsvtwJA

Redbud Audubon’s Saw-whet Owl Program Registration

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