Western small-footed bats are relatively small bats, having a total length of 8 to 10 cm (3.1 to 3.9 in), and a wingspan of about 24 cm (9.4 in). They weigh just 4 to 5 g (0.14 to 0.18 oz), with females being larger than males. Their fur is yellowish-brown in color, with paler, sometimes white, underparts. The muzzle and chin are black, as are the 11 to 16 mm (0.43 to 0.63 in) long ears. The tail is 3 to 5 cm (1.2 to 2.0 in) in length, but is almost entirely enclosed within the uropatagium, with only the tip extending beyond it. As the common name indicates, the feet are unusually small, being about half the length of the tibia.[3]
The bats have a wing aspect ratio of 6.1 and a wing loading of 6.7 N/m2, which are both relatively low values for bats.[4] They are very similar in appearance to the closely related California myotis, with which they share some of their range; the two species can be distinguished in that the latter does not have the black "face mask" of the small-footed species.[3]
Distribution
Western small-footed bats are found across much of the western half of North America, from southern British Columbia and Saskatchewan in the north down to Baja California, Zacatecas, and Nuevo León in the south. Within this region, they are most common arid and semiarid habitats, such as deserts and badlands, but may be found in pine or juniper forests, especially at higher elevations. They are found from 300 to 3,300 m (980 to 10,830 ft).[3] Two subspecies are recognised:
M. c. ciliolabrum - Western and southern parts of the range, from British Columbia to Mexico
M. c. melanorhinus - Northeastern parts of the range, from Alberta to Kansas
Biology and behavior
Western small-footed bats are nocturnal and insectivorous, feeding on moths, beetles, and flies.[5] Their flight is slow but maneuverable,[4] and they often feed close to water or to rocky bluffs.[3] Their echolocation calls vary in different parts of their range, but have been recorded as lasting 1-3 milliseconds, with a sweep of 60 down to 40 kHz in Washington state.[6] They often roost during the day in caves, but may also be found in smaller crevices, artificial structures, or under loose bark. Males typically roost alone, but females may gather into small groups of up to nineteen individuals when nursing young.[3] They hibernate during the winter, typically alone.[7] The bats give birth to a single young between June and July. The young are hairless and born, and have been recorded as weighing 1.1 g (0.039 oz).[3]
References
^Arroyo-Cabrales, J.; Álvarez-Castañeda, S.T. (2017). "Myotis ciliolabrum". IUCN Red List of Threatened Species. 2017: e.T14153A22058110. doi:10.2305/IUCN.UK.2017-2.RLTS.T14153A22058110.en. Retrieved 11 November 2021.
^Arroyo-Cabrales, J. & Ticul Alvarez Castaneda, S. (2008). "Myotis ciliolabrum". IUCN Red List of Threatened Species. 2008. Retrieved 8 February 2010.old-form url
^ abcdefHolloway, G.L. & Barclay, R.M.R. (2001). "Myotis ciliolabrum". Mammalian Species. 670: Number 670: pp. 1–5. doi:10.1644/1545-1410(2001)670<0001:MC>2.0.CO;2. S2CID 198968649.
^ abNorberg, U.M. & Rayner, J.M.V. (1987). (PDF). Philosophical Transactions of the Royal Society B. 316 (1179): 335–427. Bibcode:1987RSPTB.316..335N. doi:10.1098/rstb.1987.0030. S2CID 84236246. Archived from the original (PDF) on 2020-02-20.
^Warner, R.M. (1985). "Interspecific and temporal dietary variation in an Arizona bat community". Journal of Mammalogy. 66 (1): 45–51. doi:10.2307/1380954. JSTOR 1380954.
^Thomas, D.W.; et al. (1987). "Variation in echolocation call frequencies recorded from North American vespertilionid bats: a cautionary note". Journal of Mammalogy. 68 (4): 842–847. doi:10.2307/1381562. JSTOR 1381562.
^Szewczak, J.M.; et al. (1998). "Bats of the White and Inyo mountains of California–Nevada". Western North American Naturalist. 58 (1): 66–75.
April 16, 2023
western, small, footed, western, small, footed, myotis, ciliolabrum, also, known, western, small, footed, myotis, species, vesper, native, north, america, conservation, statusleast, concern, iucn, scientific, classificationkingdom, animaliaphylum, chordataclas. The western small footed bat Myotis ciliolabrum also known as the western small footed myotis is a species of vesper bat native to North America Western small footed batConservation statusLeast Concern IUCN 3 1 1 Scientific classificationKingdom AnimaliaPhylum ChordataClass MammaliaOrder ChiropteraFamily VespertilionidaeGenus MyotisSpecies M ciliolabrumBinomial nameMyotis ciliolabrum Merriam 1886 2 Contents 1 Description 2 Distribution 3 Biology and behavior 4 ReferencesDescription EditWestern small footed bats are relatively small bats having a total length of 8 to 10 cm 3 1 to 3 9 in and a wingspan of about 24 cm 9 4 in They weigh just 4 to 5 g 0 14 to 0 18 oz with females being larger than males Their fur is yellowish brown in color with paler sometimes white underparts The muzzle and chin are black as are the 11 to 16 mm 0 43 to 0 63 in long ears The tail is 3 to 5 cm 1 2 to 2 0 in in length but is almost entirely enclosed within the uropatagium with only the tip extending beyond it As the common name indicates the feet are unusually small being about half the length of the tibia 3 The bats have a wing aspect ratio of 6 1 and a wing loading of 6 7 N m2 which are both relatively low values for bats 4 They are very similar in appearance to the closely related California myotis with which they share some of their range the two species can be distinguished in that the latter does not have the black face mask of the small footed species 3 Distribution EditWestern small footed bats are found across much of the western half of North America from southern British Columbia and Saskatchewan in the north down to Baja California Zacatecas and Nuevo Leon in the south Within this region they are most common arid and semiarid habitats such as deserts and badlands but may be found in pine or juniper forests especially at higher elevations They are found from 300 to 3 300 m 980 to 10 830 ft 3 Two subspecies are recognised M c ciliolabrum Western and southern parts of the range from British Columbia to Mexico M c melanorhinus Northeastern parts of the range from Alberta to KansasBiology and behavior EditWestern small footed bats are nocturnal and insectivorous feeding on moths beetles and flies 5 Their flight is slow but maneuverable 4 and they often feed close to water or to rocky bluffs 3 Their echolocation calls vary in different parts of their range but have been recorded as lasting 1 3 milliseconds with a sweep of 60 down to 40 kHz in Washington state 6 They often roost during the day in caves but may also be found in smaller crevices artificial structures or under loose bark Males typically roost alone but females may gather into small groups of up to nineteen individuals when nursing young 3 They hibernate during the winter typically alone 7 The bats give birth to a single young between June and July The young are hairless and born and have been recorded as weighing 1 1 g 0 039 oz 3 References Edit Arroyo Cabrales J Alvarez Castaneda S T 2017 Myotis ciliolabrum IUCN Red List of Threatened Species 2017 e T14153A22058110 doi 10 2305 IUCN UK 2017 2 RLTS T14153A22058110 en Retrieved 11 November 2021 Arroyo Cabrales J amp Ticul Alvarez Castaneda S 2008 Myotis ciliolabrum IUCN Red List of Threatened Species 2008 Retrieved 8 February 2010 old form url a b c d e f Holloway G L amp Barclay R M R 2001 Myotis ciliolabrum Mammalian Species 670 Number 670 pp 1 5 doi 10 1644 1545 1410 2001 670 lt 0001 MC gt 2 0 CO 2 S2CID 198968649 a b Norberg U M amp Rayner J M V 1987 Ecological morphology and flight in bats Mammalia Chiroptera wing adaptations flight performance foraging strategy and echolocation PDF Philosophical Transactions of the Royal Society B 316 1179 335 427 Bibcode 1987RSPTB 316 335N doi 10 1098 rstb 1987 0030 S2CID 84236246 Archived from the original PDF on 2020 02 20 Warner R M 1985 Interspecific and temporal dietary variation in an Arizona bat community Journal of Mammalogy 66 1 45 51 doi 10 2307 1380954 JSTOR 1380954 Thomas D W et al 1987 Variation in echolocation call frequencies recorded from North American vespertilionid bats a cautionary note Journal of Mammalogy 68 4 842 847 doi 10 2307 1381562 JSTOR 1381562 Szewczak J M et al 1998 Bats of the White and Inyo mountains of California Nevada Western North American Naturalist 58 1 66 75 Retrieved from https en wikipedia org w index php title Western small footed bat amp oldid 1110668717, wikipedia, wiki, book, books, library,
