California Raven Management...• November 1 and 2, 2016 • Sage grouse and desert tortoise focused...
Transcript of California Raven Management...• November 1 and 2, 2016 • Sage grouse and desert tortoise focused...
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California Raven Management Tara Callaway
Palm Springs Field Office U.S. Fish and Wildlife Service
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Raven Workshop • November 1 and 2, 2016 • Sage grouse and desert tortoise focused • 82 participants from 42 different agencies and
organizations • Presentations • Panels • Breakout groups
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Breakout Groups
• Discussed 4 major topics – Factors that influence raven abundance – Direct management of raven populations – Measure the effectiveness of raven management – Education/outreach/communication to the public
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Breeding Bird Survey Data Sauer, USGS
Detected at ~40% of
surveys
Preliminary Information—Subject to Revision. Not for Citation or Distribution
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Breeding Bird Survey Data Sauer, USGS
Detected at ~80% of
surveys
Preliminary Information—Subject to Revision. Not for Citation or Distribution
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Factors that Influence Raven Abundance
• Priorities:
• Human behavior
• Address access to nesting substrates and prioritize areas with high tortoise densities
• Address areas with high concentration of roadkills
• Water sources: map and target
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• Priorities:
• Prioritize removal areas (TCA’s)
• Sterilization – explore alternative technologies to reduce numbers and impacts
• Compare removal efforts that are targeted vs. broad scale
• Address communal roosting sites
Direct Management of Raven Populations
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Measure the Effectiveness of Raven Management
• Priorities:
• Monitor raven population using standardized protocol
• Standardized data collection and management (database) across western range
• Increase use of Citizen Science
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California Raven Environmental Assessment (EA)
• 1989 - interagency raven control program halted by TRO from the Humane Society
• 1990 - follow-up program
delayed due to public concern • 1993-1994 - Technical Review
Team implemented experimental removal program
• 1993 – lawsuit appeal filed for
removing ravens without evidence of predation on tortoises
• 2006-2008 – DMG proceed with
development of the CA Raven EA
Photo credit: Kevin Powell
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Raven EA Alternatives • Alternative A: Status Quo
• Alternative B: Reduce human subsidies Remove identified predator ravens only
• Alternative C: Reduce human subsidies Remove identified predator ravens Remove all ravens from specific tortoise conservation areas
• Alternative D: Reduce human provided subsidies Remove identified predator ravens Remove all ravens from specific tortoise conservation areas Remove ravens from concentration areas such as landfills
• Alternative E: Reduce human provided subsidies of food, water, nest and communal roost
sites
• Alternative F: Implement phases (Alt B, followed by C and D if other Alts are unsuccessful)
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Raven EA
• Alternative F chosen • Currently, implementing Alternative B (Phase
1) and moving to Alternative C (Phase 2)
• Alternative C: Reduce human subsidies Remove identified predator ravens Remove all ravens from specific tortoise conservation
areas
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Raven Monitoring and Removal Program • Areas monitored (9 total): - Superior-Cronese DWMA (2013-2016) -Chemehuevi DWMA (2014-2016) -Chuckwalla DWMA (2013-2015) -Ord-Rodman DWMA (2016) -Piute-Fenner DWMA (2016) -Ivanpah DWMA (2013) -Joshua Tree NP (2016) -Mojave NP (2016) -DTRNA (2013)
Image taken from DTRO RATT (Recovery Action Tracking Tool)
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Education/Outreach/Communication to the Public
• Priorities:
• Bring in education specialists and PR firm– smart outreach
• Use social media
• Focus on more broad-scale message – desert-wide conservation and not just tortoise and ravens
• Develop talking points standardized across partners
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Short-Term Goals
• Outreach to public about raven issues • Setup raven abundance surveys using USGS protocol
(Pete Coates) • Toolbox of mitigation measures/BMPs • MOG/think tank group – identify interested parties
and form group and include: USFWS, DFW, BLM, DOD, APHIS, NPS, academia, USGS, NGO’s, and others (?)
• Fund research for fertility control • Share resources such as raven documentary
( https://vimeo.com/116598017) • Others?
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Long-Term Goals
• MOG/think tank group – Create a broader plan than Raven EA to include other
states beyond California – Create separate EA for other states
• Multi-level approach:
– WGA – 11 states for sage grouse and desert tortoise
• Others?
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Funding Sources
• NFWF DMG Raven Fund : ⁻ non-renewable energy projects - $105 per acre ($112,292) ⁻ distribution of funds approved by DMG
• NFWF REAT Raven Fund : - renewable energy projects - $105 per acre ($5,541,803) - distribution of funds governed by REAT (BLM, CEC, FWS, CDFW)
• $105/acre fee calculation: - Removal staff - Outreach and education - Monitoring survey team
Photo credit: Tim Shields
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Questions?
Ideas?
Photo credit: Bill Boarman
Photo credit: Kemp Anderson