Distribution of the Spotted Bat, Euderma maculatum, in California

Pierson, Elizabeth D.; Rainey, William E.

doi:10.2307/1383021

Cited by 9 publications

(8 citation statements)

References 22 publications

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“…Spotted bats appear to roost alone or in small groups in cliffs (Leonard and Fenton 1983;Bogan et al 1998;Rabe et al 1998;Siders et al 1999;O'Shea et al 2011) or caves (Hardy 1941;Geluso 2000;Mead and Mikesic 2001). They use a variety of vegetation types, including open woodland, shrubland, marsh, forest meadow, desert wash, and open canyon corridor for foraging and commuting (Leonard and Fenton 1983;Fenton et al 1987;Wai-Ping and Fenton 1989;Storz 1995;Snow et al 1996;Perry et al 1997;Pierson and Rainey 1998;Rabe et al 1998;Priday and Luce 1999), but key habitat requirements appear to be suitable roosting cliffs and proximity to open foraging areas (Wai-Ping and Fenton 1989;Storz 1995;Snow et al 1996). When foraging, spotted bats exhibit high site fidelity and typically travel on regular circuits in long, progressive ellipses (Woodsworth et al 1981;Wai-Ping and Fenton 1989;Storz 1995;Rabe et al 1998) but may adopt less predictable feeding patterns and cover larger areas (Leonard and Fenton 1983).…”

Section: Introductionmentioning

confidence: 99%

Roosts and home ranges of spotted bats (Euderma maculatum) in northern Arizona

et al. 2011

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Roosting ecology and foraging behavior of spotted bats (Euderma maculatum (J.A. Allen, 1891)) are poorly known. We captured 47 spotted bats at three locations in northern Arizona and attached radio transmitters to 16 bats to identify roosts and home ranges. We identified 14 roosts for 12 bats. Female roosts faced south; males did not select a roost aspect. Bats used a mean of 1.4 roosts during 10 days. Mean distances from capture site and nearest perennial water source to roosts were 15.1 and 5.8 km, respectively. Maximum and minimum distances from capture to roost site were 36.3 and 2.3 km, respectively. Home ranges (95% use, minimum convex polygon method) for bats averaged 297 km 2 , which was much larger than reported for spotted bats elsewhere in their range and other insectivorous bats. Maximum flight speed was 53 km/h. Most foraging locations were in desert scrub vegetation, but bats also used woodlands and forests, perhaps seeking seasonal prey or cooler sites to reduce water stress. Maternity roosts were remote, difficult to access, and within protected areas in northern Arizona. Foraging areas and ponds used for drinking, however, included private and public lands managed for a variety of uses.Résumé : On connaît mal l'écologie de l'utilisation des perchoirs et le comportement de recherche de nourriture chez les chauves-souris tachetées (Euderma maculatum (J.A. Allen, 1891)). Nous avons capturé 47 chauves-souris tachetées à trois sites dans le nord de l'Arizona et fixé des émetteurs radio à 16 des chauves-souris afin d'identifier les sites des perchoirs et les domaines vitaux. Nous avons identifié 14 sites de perchoirs pour 12 chauves-souris. Les perchoirs des femelles font face au sud; les mâles ne choisissent pas d'orientation particulière pour se percher. Sur une période de 10 jours, les chauvessouris utilisent en moyenne 1,4 perchoir. Les distances moyennes du point de capture sont de 15,1 km et du point permanent d'eau le plus proche de 5,8 km. Les distances maximale et minimale entre les points de capture et les sites des perchoirs sont respectivement de 36,3 et 2,3 km. Les aires vitales (95 % d'utilisation, méthode des polygones convexes minimaux) des chauves-souris sont de 297 m 2 , beaucoup plus qu'il n'est signalé chez les chauves-souris tachetées ailleurs dans leur aire de répartition et chez les autres chauves-souris insectivores. La vitesse maximale de vol est de 53 km à l'heure. La plupart des sites d'alimentation sont dans la végétation arbustive de désert; les chauves-souris utilisent aussi les terrains boisés et les forêts, y recherchant peut-être des proies saisonnières ou des sites plus frais pour réduire leur stress hydrique. Les perchoirs de maternité sont éloignés, difficiles d'accès et situés dans des zones protégées dans le nord de l'Arizona. Les zones d'alimentation et les étangs utilisés pour boire se retrouvent sur des terres privées et publiques gérées pour une variété d'utilisations.[Traduit par la Rédaction]

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Section: Introductionmentioning

confidence: 99%

Roosts and home ranges of spotted bats (Euderma maculatum) in northern Arizona

et al. 2011

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“…This is based on the early divergence between northern and central lineages. E. maculatum specimens are rare from CA but are known to occur along the two mountain chains from acoustic data (25). Subsequent Holocene warming likely allowed the species to expand its range inwardly throughout the Great Basin within the last six thousand years.…”

Section: Discussionmentioning

confidence: 99%

Once upon a time in Mexico: Holocene phylogeography of the spotted bat (Euderma maculatum)

Sanchez

Walker

Sobek

et al. 2022

Preprint

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Holocene-era range expansions are relevant to understanding how a species might respond to the warming and drying climates of today. The harsh conditions of North American deserts have phylogenetically structured desert bat communities but differences in flight capabilities are expected to affect their ability to compete, locate, and use habitat in the face of modern climate change. A highly vagile but data-deficient bat species, the spotted bat (Euderma maculatum) is thought to have expanded its range from central Mexico to western Canada during the Holocene. With specimens spanning this latitudinal extent, we coupled phylogeography (mtDNA) with ecological niche modeling (ENM) to investigate the Holocene biogeography from the rear to leading edges. The ENM and phylogeny supported a Holocene range expansion from Mexico with increased expansion throughout the intermountain west within the last 6 kya. Long-term isolation at the southern-most margin of the range suggests one or more populations were left behind as climate space contracted and are currently of unknown status. The species appears historically suited to track shifts in climate space but differences in flight behaviors between leading edge and core-range lineages suggest that range expansions could be influenced by differences in habitat quality or climate (e.g., drought). Although its vagility could facilitate the tracking of environmental change and thereby extinction avoidance, anthropogenic pressures at the core range could still threaten the ability for beneficial alleles to expand into the leading edge.

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“…We used our own (Rodhouse et al, 2005) and others (e.g., Fenton et al, 1987; Gitzen, West, & Baumgardt, 2001; Navo, Gore, & Skiba, 1992; Pierson & Rainey, 1998) reports of the efficacy of aural surveys over traditional capture and recording methods for E. maculatum to motivate our study design. E. maculatum is a strikingly‐colored (Figure 1) but rarely seen obligate cliff‐roosting bat ranging broadly across arid regions of western North America (Wai‐Ping & Fenton, 1989; Watkins, 1977).…”

Section: Methodsmentioning

confidence: 99%

Audible bats provide opportunities for citizen scientists

Rodhouse

Rose

Hawkins

et al. 2021

Conservat Sci and Prac

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Bat conservation has been impeded by a lack of basic information about species' distributions and abundances. Public participation in closing this gap via citizen (community) science has been limited, but bat species that produce low-frequency calls audible to the unaided human ear provide an overlooked opportunity for collaborative citizen science surveys. Audible bats are rare in regional faunas but occur globally and can be under-surveyed by traditional methods. During 2019-2020, we were joined by community members to conduct aural surveys and expand our knowledge of rare audible desert bats in western North America through a structured survey design broadly adaptable for practitioners across the globe where audible bats occur. Our study was integrated into a statistically robust but flexible master sample in use by the North American Bat Monitoring Program (NABat), ensuring representativeness of data contributions. We used survey results to update a Bayesian species distribution model for the rare spotted bat, Euderma maculatum, accounting for imperfect detection and including land cover occupancy predictors. Detection probability was estimated~0.7 ± 0.1. Informative priors from a previous attempt to model E. maculatum were leveraged with the new citizen science data to support spatial predictions of occurrence previously impeded by data sparsity and which reinforced the biogeographic importance of arid cliffs and canyons. Our results are preliminary but encouraging, and future surveys can scale up through the NABat design structure and Bayesian modeling framework. We encourage future surveys to use recording devices to obtain voucher calls and double-observer methods to address false-positive detection errors that arise with inexperienced volunteers. Our design and model supported approach to integrating citizen science surveys into bat conservation programs can strengthen both the scientific understanding of rare species and public engagement in conservation practices.

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Distribution of the Spotted Bat, Euderma maculatum, in California

Cited by 9 publications

References 22 publications

Roosts and home ranges of spotted bats (Euderma maculatum) in northern Arizona

Roosts and home ranges of spotted bats (Euderma maculatum) in northern Arizona

Once upon a time in Mexico: Holocene phylogeography of the spotted bat (Euderma maculatum)

Audible bats provide opportunities for citizen scientists

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