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 Harp traps are designed to catch flying bats without damaging their wings.  They consist of a frame that supports two rows of fine thread, and a catching.

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Presentation on theme: " Harp traps are designed to catch flying bats without damaging their wings.  They consist of a frame that supports two rows of fine thread, and a catching."— Presentation transcript:

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2  Harp traps are designed to catch flying bats without damaging their wings.  They consist of a frame that supports two rows of fine thread, and a catching bag at the base. If a bat detects the first row and swerves to pass through, it collides with the second row and tumbles into the collecting bag.

3  Mist nets are used by ornithologists and bat biologists to capture wild birds and bats for banding or other research projects.  Mist nets are typically made of nylon mesh suspended between two poles, resembling an oversized volleyball net.  When properly deployed, the nets are virtually invisible.

4  Traps are checked after the evening peak activity and bats are collected  Processing of most bats are done in the forests, however selected species will be taken back to base for further processing  If kept over night, released at first light and species trapped during dawn peak activity processed

5  Measurements taken once a bat has been trapped:  Forearm length  Age  Sex  Species  Weight  Location  If the individual has been caught before, we can then work out how far the bat has traveled since we last caught it, and how much older it is

6  By attaching a small electronic device to an individual animal, movement throughout its environment can be accurately tracked and monitored.  There are a number of different tracking techniques, but each involves the transmission of an electronic signal from an attached device – either via satellite, high frequency radio waves, or the mobile telephone network.

7  In this study, radio tracking will be used to identify roosts.  The spatial co-ordinates are recorded and then then the roost is characterised in terms of its physical characteristics  Roost type  Diameter at breast height  Height of roost opening  Vegetation cover  Distance to trail, water etc  The roost is monitored daily to see if the bat switches roosts

8  Field surveys are essential to identify the habitats present in a study area and to record the locations of habitats  Habitat surveys are done in 50x50m plots.  Each tree over 5m is assigned to a size class.


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