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The Pond Bat (Myotis dasycneme) is a species of vesper bat in the Vespertilionidae family. It is found in Eurasia from France to Russia and Kazakhstan.

Physical characteristicsEdit

The bat is medium sized, with a noticeally short tragus for a species in the Myotis genus. Fur is thick and black-brown at the base, with brownish or yellowish-grey fur on the dorsal side and white-grey or yellow-grey fur on the ventral side.

StatusEdit

The species is world endangered, with a large decline in numbers in the west of range; many nursery sites in the Netherlands have been lost.

HabitatEdit

In the summer this species nests in lowland regions with areas of water, meadows and woods, with winter roosts also occurring in the foothills of mountains. The record for the altitutude of a M. dasycneme roost is 1000 meters above sea level, with winter roosts not normally occurring more than 300 meters above sea level. Summer roosts are mostly in roof spaces or church towers, with individuals sometimes found nesting in hollow trees.

ReproductionEdit

Females reach sexual maturity in the second year. The mating season is from the end of August, with nursery roosts then becoming occupied the following may with 40-400 females, although rarely any males. The maximum recorded age is 19 years.

HuntingEdit

Members of this species emerge to hunt in late dusk, with either 1 or 2 foraging periods in evening and early morning. Hunting occurs over water, meadows and along woodland edges, with rapid, skillful flight (sometimes only 5-10 cm above water). Prey includes gnats, mosquitoes, moths and insects caught from the surface of the water.

EcholocationEdit

Echolocation is done with FM singles between 60 and 24 kHz, with a 5-8 millisecond duration. The call sequence occurs every 115 milliseconds on average, with approximately 8-10 signals per second. Signal range is between 5 and 20 meters.

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