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Growth characteristics of three species of horseshoe bats (Rhinolophus ferrumequinum, R. euryale and R. mehelyi) were studied in northern Bulgaria, and measurements of cohorts born there in different years were compared interannually. Bulgarian horseshoe bats are usually born in the first 3 weeks of June and start to leave the roost at an age of about 3 weeks. Young horseshoe bats of all three species...
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