Volant mammals

All volant mammals are relatively small and most are nocturnal. The most readily surveyed are the communal species that can be found in caves for all or part of their annual cycle. Bats can be counted in the roost, or individuals captured with nets, or counted visually when the bats enter or exit the cave. For bats with solitary roosts or to sample foraging sites of communal species, nets that span natural passageways or watering holes are the norm. However, it is difficult to erect mist-nets and harp-nets to match the space being used by the


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either by providing a weak link or a remote-release magnetic mechanism in the collar.

Once locations have been collected for an animal, it is possible to determine its home range, habitat use, and multiple other natural history parameters. An additional benefit of radio-collared animals is the ability to construct life history tables. It is difficult to determine if wild animals have died or migrated when they stop being detected by other means. However, which fate occurred is very important for most modeling of animal populations. With radio-collared animals, it is possible to differentiate between mortality and migration, and to determine the timing and cause of mortality.

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