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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Western mastiff bat

They report an alarming loss of these bats’ magical sounds over the Southwest over the past 30 years. Captive bats are unable to take off from the ground or from flat surfaces, and also are unable to maintain flight after launching themselves from the tops of tables.

Animals with perotia symmetry have dorsal and ventral sides, as well as anterior and posterior ends. In dunes near seas and oceans this is compounded by the influence of salt in the air and soil.

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Western mastiff bat – Wikipedia

Some insect prey include: A specimen of Eumops captured at Quitobaquito Pond in southern Arizona for banding and release. The stomachs of 18 bats collected in Big Bend National Park perotie moths It has chocolate brown fur and thirty teeth.

Geographic Range The distribution of the western mastiff bat is patchy. Other Physical Features endothermic bilateral symmetry Average mass 57 g 2. Pest control operations have eliminated most known building colonies in the Los Angeles basin. Mating System polygynous Males and females of this species remain together throughout the year, including the period when young are produced. The fungus, Geomyces destructansgrows best in cold, humid conditions that are typical of many bat hibernacula.


The National Geographic Society. Prior to overgrazing, many of these places supported excellent springs and broad flowing streams. Prey includes relatively small, low-flying, and weak-flying insects.

This page was last edited on 7 Mayat Ongoing Recovery Loss of large open-water drinking sites seems perotls pose a serious threat to mastiff bats in the Southwest. The mammals of Texas.

Neotropical living in the southern part of the New World. The distribution of the western mastiff bat is patchy. Arizona Academy of Sciences: It does not undergo prolonged hibernation, and appears to be periodically active all winter, and thus may seek winter refugia that are protected from prolonged freezing temperatures.

This species is non-migratory Hall,Allen,Cockrum, These bats leave their day roosts late in the evening to forage.

Though we edit our accounts for accuracy, we cannot guarantee all information peroti those accounts. The southern limit of its range is in Argentina.

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. Eumopa 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. Vegetation is typically sparse, though spectacular blooms may occur following rain.


The northern limit of its range is the southern half of California. The offspring are dull black in color at birth and are naked, except for tactile hairs on the feet and face.

Western Mastiff Bat (Subspecies Eumops perotis californicus) ยท

There are openings on both the lower eumopd upper edges of the slab. Unlike vespertilionids which mate in the fall, North American molossids, including E.

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. Males have a peculiar glandular pouch on the throat. The presence of flightless insects, such as crickets, in their diet is interesting as these bats are unable to take off from the ground and therefore, cannot alight to capture such prey.