| Scientific Name | Crotalus scutulatus scutulatus |
| Category | D |
| Taxon | Reptiles |
| Climate Change Vulnerability Score | Less Vulnerable |
The Mojave Rattlesnake (Crotalus scutulatus scutulatus) is a large (61-129 cm [24-51 in]), highly venomous snake found in the deserts and arid regions of the southwestern US, including Arizona, California, Nevada, and New Mexico. In New Mexico, this species is found in Otero and Hidalgo Counties. Its background color varies from greenish-gray, yellow, tan, and olive-green to brown. It has irregular, dark, well-defined, diamond or near diamond-shaped dorsal markings. It eats a wide variety of smaller animals, lizards, and other snakes. The Mojave Rattlesnake will experience a high degree of climate exposure and has a high adaptive capacity. Overall, it has a Climate Change Vulnerability Index ranking of Less Vulnerable under both Representative Concentration Pathway (RCP) 4.5 and RCP 8.5 Scenarios. The Mojave Rattlesnake’s climate change vulnerability is impacted by factors related to distribution, demography, and abiotic niche, which influence its ability to shift in space, persist in place, and respond to climate change impacts.
Threats and Conservation Actions
Result for:
All
Agriculture and Aquaculture
Biological Resource Use
Transportation and Service Corridors
Assess the synergistic effects between climate change and other threats to SGCN and their habitats (e.g., Friggens et al. 2019, Parks et al. 2019). Incorporate appropriate climate adaptation strategies and frameworks into projects designed to address these synergistic effects. This may include enhancing connectivity (CEQ 2023), facilitating a species’ innate adaptive capacity (Thurman et al. 2022), enhancing genetic diversity (Powell 2023), considering local adaptation (Meek et al. 2023), or considering whether it is most appropriate to resist, accept, or direct ecosystem transformation (Lynch et al. 2021, Stevens et al. 2021). Projects should acknowledge ecosystem dynamism and incorporate indigenous knowledge (e.g., Roos et al. 2022, Eisenberg et al. 2024), nature-based solutions (Warnell et al. 2023), and experimentation (Guiterman et al. 2022) when appropriate. Potential collaborators: BLM, NPS, USFS, USFWS, USGS, universities, Tribal natural-resource managers.
Agriculture and Aquaculture
Biological Resource Use
Transportation and Service Corridors
Assess the synergistic effects between climate change and other threats to SGCN and their habitats (e.g., Friggens et al. 2019, Parks et al. 2019). Incorporate appropriate climate adaptation strategies and frameworks into projects designed to address these synergistic effects. This may include enhancing connectivity (CEQ 2023), facilitating a species’ innate adaptive capacity (Thurman et al. 2022), enhancing genetic diversity (Powell 2023), considering local adaptation (Meek et al. 2023), or considering whether it is most appropriate to resist, accept, or direct ecosystem transformation (Lynch et al. 2021, Stevens et al. 2021). Projects should acknowledge ecosystem dynamism and incorporate indigenous knowledge (e.g., Roos et al. 2022, Eisenberg et al. 2024), nature-based solutions (Warnell et al. 2023), and experimentation (Guiterman et al. 2022) when appropriate. Potential collaborators: BLM, NPS, USFS, USFWS, USGS, universities, Tribal natural-resource managers.
Agriculture and Aquaculture
Biological Resource Use
Transportation and Service Corridors
Assess the synergistic effects between climate change and other threats to SGCN and their habitats (e.g., Friggens et al. 2019, Parks et al. 2019). Incorporate appropriate climate adaptation strategies and frameworks into projects designed to address these synergistic effects. This may include enhancing connectivity (CEQ 2023), facilitating a species’ innate adaptive capacity (Thurman et al. 2022), enhancing genetic diversity (Powell 2023), considering local adaptation (Meek et al. 2023), or considering whether it is most appropriate to resist, accept, or direct ecosystem transformation (Lynch et al. 2021, Stevens et al. 2021). Projects should acknowledge ecosystem dynamism and incorporate indigenous knowledge (e.g., Roos et al. 2022, Eisenberg et al. 2024), nature-based solutions (Warnell et al. 2023), and experimentation (Guiterman et al. 2022) when appropriate. Potential collaborators: BLM, NPS, USFS, USFWS, USGS, universities, Tribal natural-resource managers.
Agriculture and Aquaculture
Balance irrigation and groundwater demands with the needs of aquatic communities, particularly those supporting native fish, amphibian, and springsnail populations. This may include promoting a transition from irrigated to dryland farming in areas where groundwater pumping and water scarcity threaten SGCN and their habitats. Potential collaborators: BOR, NRCS, USACE, NMOSE, non-profit organizations, private landowners, Tribal natural-resource managers, water-management districts.
Agriculture and Aquaculture
Biological Resource Use
Transportation and Service Corridors
Collaborate with interested and willing land managers and private landowners to designate protected areas or implement conservation easements for lands that encompass important SGCN habitats. Potential collaborators: BLM, NPS, NRCS, USFS, USFWS, SLO, non-profit organizations, private landowners.
Agriculture and Aquaculture
Biological Resource Use
Transportation and Service Corridors
Collaborate with interested and willing land managers and private landowners to designate protected areas or implement conservation easements for lands that encompass important SGCN habitats. Potential collaborators: BLM, NPS, NRCS, USFS, USFWS, SLO, non-profit organizations, private landowners.
Agriculture and Aquaculture
Biological Resource Use
Transportation and Service Corridors
Collaborate with interested and willing land managers and private landowners to designate protected areas or implement conservation easements for lands that encompass important SGCN habitats. Potential collaborators: BLM, NPS, NRCS, USFS, USFWS, SLO, non-profit organizations, private landowners.
Agriculture and Aquaculture
Determine how timing, intensity, and duration of livestock grazing affect SGCN and their habitats, including the interactions among grazing, fire, and the spread of invasive and problematic species and among grazing, soil erosion (e.g., Pilon et al. 2017), and native riparian vegetation growth (e.g., Lucas et al. 2004). Potential collaborators: BLM, NRCS, USFS, NMDA, SLO, universities, private landowners, Tribal natural-resource managers.
Agriculture and Aquaculture
Biological Resource Use
Transportation and Service Corridors
Determine life history needs, ecology, distribution, movements, status, and trends of and threats to SGCN (especially invertebrates that are not currently monitored, riparian-obligate species, herpetofauna [Pierce et al. 2016, Olson and Pilliod 2022], and rare native fishes) and their habitats. Consider full annual cycles for migratory species when appropriate and logistically feasible (KFF 2021) and interactions with lower trophic levels that may drive SGCN status (e.g., EPA 2023). Use this information to develop and implement effective monitoring protocols and conservation actions, including actions to mitigate identified threats. Potential collaborators: BLM, BOR, NPS, USFS, USFWS, SLO, universities, non-profit organizations, private industry, species working groups, Tribal natural-resource managers.
Agriculture and Aquaculture
Biological Resource Use
Transportation and Service Corridors
Determine life history needs, ecology, distribution, movements, status, and trends of and threats to SGCN (especially invertebrates that are not currently monitored, riparian-obligate species, herpetofauna [Pierce et al. 2016, Olson and Pilliod 2022], and rare native fishes) and their habitats. Consider full annual cycles for migratory species when appropriate and logistically feasible (KFF 2021) and interactions with lower trophic levels that may drive SGCN status (e.g., EPA 2023). Use this information to develop and implement effective monitoring protocols and conservation actions, including actions to mitigate identified threats. Potential collaborators: BLM, BOR, NPS, USFS, USFWS, SLO, universities, non-profit organizations, private industry, species working groups, Tribal natural-resource managers.
Agriculture and Aquaculture
Biological Resource Use
Transportation and Service Corridors
Determine life history needs, ecology, distribution, movements, status, and trends of and threats to SGCN (especially invertebrates that are not currently monitored, riparian-obligate species, herpetofauna [Pierce et al. 2016, Olson and Pilliod 2022], and rare native fishes) and their habitats. Consider full annual cycles for migratory species when appropriate and logistically feasible (KFF 2021) and interactions with lower trophic levels that may drive SGCN status (e.g., EPA 2023). Use this information to develop and implement effective monitoring protocols and conservation actions, including actions to mitigate identified threats. Potential collaborators: BLM, BOR, NPS, USFS, USFWS, SLO, universities, non-profit organizations, private industry, species working groups, Tribal natural-resource managers.
Biological Resource Use
Determine the distribution (historic, current, and future), composition, disturbance regimes, and function of piñon (Pinus spp.)-juniper (Juniperus spp.) woodlands and savannas needed by SGCN and SGCN prevalence in these habitats. Potential collaborators: BLM, NPS, USFS, USFWS, universities, private landowners, Tribal natural-resource managers.
Agriculture and Aquaculture
Determine where habitat restoration would benefit SGCN and work with federal, state, Tribal, and private landowners to restore degraded rangelands to good or excellent condition. Monitor restoration results to develop and initiate any identified improvements to restoration practices. Potential collaborators: BLM, USFS, SLO, private landowners, Tribal natural-resource managers.
Transportation and Service Corridors
Determine where roads, vehicle traffic, and utility lines are inhibiting or preventing movement of SGCN, including during migration. Identify and conserve natural habitat corridors, especially those at risk from future fragmentation by roads or utility lines. This may include reconnecting stream and wetland habitats that have been fragmented by roads, culverts, and other man-made structures that isolate and preclude movement of aquatic and semi-aquatic SGCN. Does not include structures that serve a beneficial role for wildlife (e.g., native fish barriers). Re-establish SGCN in areas where extirpated and appropriate. Potential collaborators: BLM, NPS, USFS, NMDOT, universities, non-profit organizations, private landowners, utility companies.
Biological Resource Use
Develop and implement strategies to sustainably harvest wood products while retaining pine (Pinus spp.)-oak (Quercus spp.) regeneration, old-growth trees, large diameter snags, and coarse woody debris at densities needed by SGCN. Potential collaborators: BLM, USFS, SFD, SLO, private landowners.
Agriculture and Aquaculture
Employ existing incentive programs to promote persistence of productive wildlife habitat and native vegetation on private lands, SGCN conservation, and retirement of agricultural fields and water rights where feasible. Support maintenance and growth of incentive programs. Potential collaborators: BLM, NRCS, USFWS, NMDA, SLO, private landowners.
Biological Resource Use
Enforce laws that protect SGCN populations that are often collected illegally, especially reptiles and amphibians. Longer-lived species, such as turtles, may be especially threatened by over-collection (Fitzgerald et al. 2004). Potential collaborators: BLM, DOD, NPS, USFS, USFWS, SLO.
Agriculture and Aquaculture
Establish baseline composition, condition, disturbance regimes, and function of major range habitats to inform habitat-restoration actions, particularly for piñon (Pinus spp.)-juniper (Juniperus spp.), sagebrush, and riparian habitats. Includes addressing tree invasion into grassland meadows and shrub invasion into historic grasslands. Potential collaborators: BLM, USFS, SFD, SLO, universities, private landowners, Tribal natural-resource managers.
Agriculture and Aquaculture
Biological Resource Use
Transportation and Service Corridors
Evaluate the effectiveness of public education and outreach efforts regarding threats to SGCN and their habitats and the ways that the public can assist in threat mitigation (KFF 2021). Modify outreach activities as needed in response to evaluation outcomes. Potential collaborators: BLM, BOR, NPS, USACE, USFS, USFWS, USGS, NMED, NMSP, SFD, SLO, universities, local governments, municipalities, non-profit organizations.
Agriculture and Aquaculture
Biological Resource Use
Transportation and Service Corridors
Evaluate the effectiveness of public education and outreach efforts regarding threats to SGCN and their habitats and the ways that the public can assist in threat mitigation (KFF 2021). Modify outreach activities as needed in response to evaluation outcomes. Potential collaborators: BLM, BOR, NPS, USACE, USFS, USFWS, USGS, NMED, NMSP, SFD, SLO, universities, local governments, municipalities, non-profit organizations.
Agriculture and Aquaculture
Biological Resource Use
Transportation and Service Corridors
Evaluate the effectiveness of public education and outreach efforts regarding threats to SGCN and their habitats and the ways that the public can assist in threat mitigation (KFF 2021). Modify outreach activities as needed in response to evaluation outcomes. Potential collaborators: BLM, BOR, NPS, USACE, USFS, USFWS, USGS, NMED, NMSP, SFD, SLO, universities, local governments, municipalities, non-profit organizations.
Agriculture and Aquaculture
Gather and assess current information on grazing practices and determine how the Department can support landowners that provide habitat for SGCN. Potential collaborators: BLM, NRCS, USFS, NMDA, SLO, private landowners, Tribal natural-resource managers.
Agriculture and Aquaculture
Identify human-constructed water-retention structures (e.g., stock tanks, water troughs, and drinkers) that provide habitat for aquatic SGCN and other wildlife, particularly amphibians. Remove invasive species (e.g., bullfrogs [Rana (Aquarana) catesbeiana]) from these structures that may threaten native aquatic wildlife. Potential collaborators: BLM, USFS, universities, private landowners, Tribal natural-resource managers.
Agriculture and Aquaculture
Biological Resource Use
Transportation and Service Corridors
Identify or develop an accessible, jointly used database to document the status and condition of, threats to, and conservation actions implemented across aquatic, riparian, and upland habitats. Identify data gaps (e.g., Ganey et al. 2017) and implement standardized methods to gather habitat data (e.g., Vollmer et al. 2018, Shirk et al. 2023) and to monitor the success of conservation actions (e.g., Davis and Pinto 2021), including impacts on local SGCN populations. Synthesize existing information (e.g., Jain et al. 2021) and apply modeling techniques to aid in evaluating success when appropriate (e.g., Parks et al. 2018). Adjust future conservation actions as needed based on observed outcomes. Potential collaborators: BLM, BOR, NPS, USACE, USFS, USFWS, USGS, NMED, SFD, SLO, universities.
Agriculture and Aquaculture
Biological Resource Use
Transportation and Service Corridors
Identify or develop an accessible, jointly used database to document the status and condition of, threats to, and conservation actions implemented across aquatic, riparian, and upland habitats. Identify data gaps (e.g., Ganey et al. 2017) and implement standardized methods to gather habitat data (e.g., Vollmer et al. 2018, Shirk et al. 2023) and to monitor the success of conservation actions (e.g., Davis and Pinto 2021), including impacts on local SGCN populations. Synthesize existing information (e.g., Jain et al. 2021) and apply modeling techniques to aid in evaluating success when appropriate (e.g., Parks et al. 2018). Adjust future conservation actions as needed based on observed outcomes. Potential collaborators: BLM, BOR, NPS, USACE, USFS, USFWS, USGS, NMED, SFD, SLO, universities.
Agriculture and Aquaculture
Biological Resource Use
Transportation and Service Corridors
Identify or develop an accessible, jointly used database to document the status and condition of, threats to, and conservation actions implemented across aquatic, riparian, and upland habitats. Identify data gaps (e.g., Ganey et al. 2017) and implement standardized methods to gather habitat data (e.g., Vollmer et al. 2018, Shirk et al. 2023) and to monitor the success of conservation actions (e.g., Davis and Pinto 2021), including impacts on local SGCN populations. Synthesize existing information (e.g., Jain et al. 2021) and apply modeling techniques to aid in evaluating success when appropriate (e.g., Parks et al. 2018). Adjust future conservation actions as needed based on observed outcomes. Potential collaborators: BLM, BOR, NPS, USACE, USFS, USFWS, USGS, NMED, SFD, SLO, universities.
Biological Resource Use
Inform natural-resource law enforcement staff of the distribution, life history, and habitat needs of SGCN. Partner with them to enforce laws to protect SGCN populations and habitats. Potential collaborators: BLM, NPS, USFS, USFWS.
Agriculture and Aquaculture
Promote expanded use of appropriate, cost-effective grazing practices that ensure long-term ecological sustainability for SGCN and their habitats (especially riparian habitats). These include actions such as rest-rotation grazing management and conservation easements (Gripne 2005) that contribute to recovery of rangelands impacted by drought and allow restoration activities to be completed. May also include the use of virtual fencing to keep livestock in desired locations and out of sensitive areas (USFS 2024). Potential collaborators: BLM, USFS, SLO, private landowners, Tribal natural-resource managers.
Agriculture and Aquaculture
Promote grazing systems that address local needs of livestock and for SGCN habitat, including riparian areas. When particular habitat components need improvement, coordinate with ranchers and resource managers to identify and implement modifications that would provide the desired habitat outcomes. BLM, USFS, SLO, private landowners, Tribal natural-resource managers.
Agriculture and Aquaculture
Promote grazing systems that incorporate rested pastures and help improve overall range condition and enhance wildlife habitat health and function. In upland areas, these systems may include rest-rotation and/or deferred-rotation. In riparian areas, beneficial grazing practices may also include grazing in early spring and restricting summer grazing and redistribution practices such as herding and developing drinking water sources in upland areas. Especially during times of drought, rested pastures can provide forage reserves and relieve pressure on grazed pastures or allotments. Potential collaborators: BLM, NRCS, USFS, USFWS, SLO, private landowners, Tribal natural-resource managers.
Agriculture and Aquaculture
Promote use of ecoregion-appropriate agricultural practices that provide habitat or resources or protect habitat quality (e.g., reduce erosion) for SGCN, including planting rows of trees between crops (McCarthy 2024) and pollinator-friendly practices such as planting pollinator habitat along field margins and underutilized areas, revegetating retired farmland with wildflowers, including pollinator-friendly forbs in cover-crop seed mixes (O’Brien and Arathi 2021), waiting to mow along acequias or other areas until after pollinator-friendly plants finish flowering (e.g., Xerces Society 2018), and conserving semi-natural habitat near agricultural fields (Shi et al. 2024). Potential collaborators: NRCS, USFWS, NMDA, private landowners, Tribal natural-resource managers.
Transportation and Service Corridors
Site, consolidate, and maintain utility corridors to minimize adverse effects to SGCN and their habitats. Reduce avian powerline collisions by using line markers and illumination with ultraviolet lights and by burying powerlines (Bateman et al. 2023). Avoid mowing rights-of-way during peak SGCN pollinator larvae abundance and avoid mowing patches of nectar resources important for pollinator SGCN (e.g., Xerces Society 2018). Potential collaborators: BLM, DOD, USFS, SLO, interested and affected members of the public, local governments, utility companies.
Biological Resource Use
Support programs that educate the public about the importance of not illegally collecting or harassing SGCN, especially reptiles and amphibians (Pierce et al 2016). Potential collaborators: BLM, DOD, NPS, USFS, USFWS, SLO.
Agriculture and Aquaculture
Transportation and Service Corridors
Where appropriate, incorporate native, pollinator-friendly plants (Glenny et al. 2022) or native plants adapted to projected future climatic conditions at the restoration site (e.g., Meek et al. 2023, Stanturf et al. 2024) into seed mixes and live plantings used in the restoration of lands affected by grazing, fire, resource extraction, energy development, or urban development. Consider reclamation site conditions, genetic diversity, and resilience to local threats when producing seedlings (Davis and Pinto 2021) and consider appropriate climate analogs when identifying appropriate seed sources (e.g., Richardson et al. 2024). When focused on benefiting pollinators, prioritize plants that are attractive to pollinators, especially SGCN; support pollinators throughout the growing season (Glenny et al. 2023); provide food for caterpillars of insect SGCN (e.g., Dumroese et al. 2016); and produce pollen with high nutritional diversity (Vaudo et al. 2024). Potential collaborators: BLM, NPS, NRCS, USFS, SFD, SLO, energy and mining companies, non-profit organizations, private landowners, Tribal natural-resource managers.
Agriculture and Aquaculture
Transportation and Service Corridors
Where appropriate, incorporate native, pollinator-friendly plants (Glenny et al. 2022) or native plants adapted to projected future climatic conditions at the restoration site (e.g., Meek et al. 2023, Stanturf et al. 2024) into seed mixes and live plantings used in the restoration of lands affected by grazing, fire, resource extraction, energy development, or urban development. Consider reclamation site conditions, genetic diversity, and resilience to local threats when producing seedlings (Davis and Pinto 2021) and consider appropriate climate analogs when identifying appropriate seed sources (e.g., Richardson et al. 2024). When focused on benefiting pollinators, prioritize plants that are attractive to pollinators, especially SGCN; support pollinators throughout the growing season (Glenny et al. 2023); provide food for caterpillars of insect SGCN (e.g., Dumroese et al. 2016); and produce pollen with high nutritional diversity (Vaudo et al. 2024). Potential collaborators: BLM, NPS, NRCS, USFS, SFD, SLO, energy and mining companies, non-profit organizations, private landowners, Tribal natural-resource managers.
Agriculture and Aquaculture
Where appropriate, promote the use of flood irrigation for crops such as grass hay in historic riparian floodplains of upper watershed regions to mimic natural processes (i.e., seasonal flooding) and benefit SGCN and other wildlife (Donnelly et al. 2024). Potential collaborators: NRCS, NMDA, non-profit organizations, private landowners, Tribal natural-resource managers.
Transportation and Service Corridors
Work with appropriate agencies to develop and enforce road-management plans (Crist et al. 2005). Potential collaborators: BLM, USFS.
Transportation and Service Corridors
Work with collaborators to complete mitigation measures that will increase the probability of safe passage across roads and near utility lines for affected SGCN. These include modifying barrier fences along roadways, constructing road crossings, placing warning signs for motorists, marking utility lines so they can be readily seen by birds, and placing safeguards that will reduce the probability of electrocution. Integrate benefits to SGCN in projects primarily designed and implemented to enhance safe passage for large mammals (e.g., projects implemented under the Wildlife Corridors Action Plan) (Cramer et al. 2022). Monitor the efficacy of mitigation measures and initiate any identified maintenance and improvements. Potential collaborators: BLM, DOD, USFS, NMDOT, SLO, private landowners, utility companies, Tribal natural-resource managers.
Biological Resource Use
Work with landowners and land-management agencies to use forests, woodlands (including piñon-juniper woodlands), and savannas in a manner that maintains healthy, and returns degraded, vegetation to an improved composition and function for SGCN, while protecting grassland communities surrounding piñon-juniper woodlands from woody plant invasion. Potential collaborators: BLM, DOD, NPS, USFS, SFD, SLO, private landowners.
Agriculture and Aquaculture
Work with private landowners to improve irrigation processes and infrastructure to conserve water. Includes promoting the use of devices and models that improve water conservation and irrigation efficiency (Schaible and Aillery 2012, Wang 2019) to help conserve the structure and function of aquatic and riparian habitats. Potential collaborators: NRCS, NMOSE.
