Diary of a bat hunter
Wed, 25 Feb 2009 2:23 pm – Posted by Brian Lloyd | 3 Comments
Forest & Bird’s Bat Survey Officer, Top of the South, Brian Lloyd
Tasked with the job of surveying bat populations in the top of the South island, I have spent many summer days setting out bat detectors around the countryside in the hope that they pick up the high frequency echolocation (or clicks) that bats use to navigate their way around.
Short-tailed bat, Photo: Rosalind Cole
Sometimes a seemingly fruitless task , finding populations of these rare and elusive short-tailed and long-tailed bats, contributes to a national picture of the status of these two disappearing species.
Differing not only in appearance, but also with respect to feeding patterns & behaviour, our two bat species share little in common.
Short –tailed bats generally roost in large tree cavities, and in winter are known to stay in their roosts and go into torpor. Like our kakapo, they have a lek breeding system, which is the equivalent of a male sing-star contest to win over a prize mate. Most peculiarly though, is the way that they forage. Unlike most other micro-bats that catch air-borne creatures, short-tailed bats are known to forage on the ground using their folded wings as front limbs. This unusual trait makes them particularly vulnerable to predation. In the central North Island I found several thousand of these wonderful creatures in the large tracts of indigenous forest from Urewera west to Taranaki. A career highlight!