The type specimen, a male, was obtained on 7 November 2006 by four collectors[a] at the Ironbark Dam in the Oyala Thumotang National Park.

[2][3] The epithet refers to a conservation advocate of bats, Leslie Hall, which the authors gave in honour of his contribution to chiropteran research.

The known records are separated by around 500 kilometres, in a region poorly surveyed for bat populations, and it may be widespread or occur in isolated colonies.

[2] The species is known from specimens captured by mist nets laid near bodies of water in open vegetation of eucalypt woodlands.

[2] The conservation status of Ozimops halli is data deficient at the entry in the IUCN redlist, which notes the stability of the population as unknown.