Abstract. We report the first record of the greater mastiff bat Eumops perotis from Oklahoma. This specimen represents a 1, km range extension from the. Geographic distribution of the greater mastiff bat. Eumops perotis is unusual in that there are two widely disjunct regions of occurrence. The northern portion. Information about the Western Mastiff Bat (Eumops perotis), a species found in the State of Texas.

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The diet consists primarily of moths Lepidopterabut also includes crickets and katydids. The period of parturition probably extends from June to early July and a nursery colony may contain young ranging from newborn individuals to ones that are several weeks old.

National Park Service, Wildlife Health. They usually feed from ground to tree-level eumos may soar to heights of some 60 m in rugged terrain. In other words, Central and South America. Vegetation is dominated by stands of dense, spiny shrubs with tough hard or waxy evergreen leaves.

Observations indicate that males and females of this species remain together throughout the year, even during the period when young are produced.

ADW: Eumops perotis: INFORMATION

It is the largest molossid in North America. Conservation Status Apparently, litte data is available for the current status of this bat species. Their colonies are small, usually numbering fewer than members, and adult males can be found in maternity colonies Cockrum, ; Texas Tech, ; Ahlborn, Both sexes of the western mastiff bat possess a peculiar dermal gland on the throat which looks like a pouch and produces an odoriferous secretion, athough this gland is much more developed in the males Ahlborn, ; Texas Tech, ; Allen, Roosts are generally high above the ground, usually allowing a clear vertical drop of at least 9.

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A specimen of Eumops captured at Quitobaquito Pond in southern Arizona for banding and release. Prior to overgrazing, many of these places supported excellent springs and broad flowing streams.

Because its wing structure is adapted for fast and straight-line flight, it is unable to drink from water sources less than 30 m long. A large free-tailed bat, similar to Tadarida and Nyctinomops in general appearance but nearly twice as large; foot large, ratio of foot to tibia about 60; ears large, united across the forehead and projecting about 10 mm beyond the snout; second joint of fourth finger about 6 mm; pelage short and velvety; upperparts brown or grayish brown, bases of hairs whitish; underparts paler.

Normally only one young is produced per pregnancy, with twins being very rare. Other More surveys are needed, using acoustic techniques, to delineate the range of this species.

By using this site, you agree to the Terms of Use and Privacy Policy. The fungus, Geomyces destructansgrows best in cold, humid conditions that are typical of many bat hibernacula. They report an alarming loss of these bats’ magical sounds over the Southwest over the past 30 years.

This is unusual as most bat species produce calls in a kHz range far above that of which is audible to humans. Eumops perotis Schinz Description. Males remain with females during the period when young are produced but it is uncertain what degree of assistance in care they actually provide. Ongoing Recovery Loss of large open-water drinking sites seems to pose a serious threat to mastiff bats in the Southwest. Bat Conservation International lists Eumops perotis on its Threatened and Endangered Bats List due to the the fact that it uses only select drinking sites and is severely limited by the availability of drinking water.

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Western mastiff bat

The Western Mastiff Bat normally prefers a colonial roosting ;erotis with fewer than members, but there are some instances when it will roost individually Burt and Grossenheider, A nursery colony of these bats may contain young ranging from newborn individuals to ones already several weeks old. Insects carried aloft by thermal currents probably furnish an important portion of their diet.

Mating occurs in early spring when the dermal gland of adult males is most functional and the testes enlarge and descend. In other projects Wikimedia Commons Perotls. At this site the canyon wall is about 38 m high and the rather steep slope below the cliff has no tall vegetation that might obstruct the takeoff and landing of the bat.

Negative This species sometimes roosts in high buildings or tunnels where it can be an unsightly nuisance. These prey items are likely to be taken from surfaces such as canyon walls Cockrum ; Texas Tech, ; Ahlborn, Eumo;s dunes near seas and oceans this is compounded by the influence of salt in the air and soil. Tadarida brasiliensis which undergo long distance seasonal migrations, E. From Wikipedia, the free encyclopedia. Geographic Range The distribution of the western mastiff bat is patchy.

Biogeographic Regions nearctic native neotropical native Habitat Suitable habitat for the western mastiff bat consists of extensive open areas with potential roost locations having vertical faces to drop off from and take flight, such as crevices in rock outcropings and cliff faces, tunnels and tall buildings.