For me, our trip highlight was the visit to the Khao Chong Pran Cave in Ratchaburi Province. Nearly 40 years ago Buddhist monks who owned the cave had asked my advice. Their monastery relied on bat guano fertilizer sales for support. But in 1981 production was plummeting. Of course, and the monks wanted to know why.
Before dawn the next morning, my then young field assistant and interpreter, Surapon Duangkhae, and I discovered poachers using large fish nets to capture bats at the cave entrance. They were selling them to local restaurants. We hired two of the poachers to help us document the extent of the problem, then advised the monks to hire a game warden to protect their bats.
We arrived at sunset at the OurLand Nature Reserve in Kanchanaburi Province, our home for the next 5 days. We quickly set up a few mist nets and a harp trap and were rewarded with a brace of lesser false vampire bats (Megaderma spasma) and several cave nectar bats (Eonycteris spelaea). Merlin took the opportunity to show the group how to train a bat. Unfortunately, the chosen bat was unusually difficult. However, just over an hour later it eagerly permitted Merlin to approach, enticing it to drink from a syringe filled with sugar water.
The next morning, we climbed 200 steps in search of roosting bats located in two caves above a monastery occupied by Buddhist shrines.
Initially, we captured a long-winged tomb bat (Taphazous longimanus) but as the group was looking at that one, I netted two bumblebee bats (Craseonycteris thonglongyai). Both were females weighing around two grams. They were delicately held by group participants while I explained the species’ anatomy, ecology, and conservation status.
Loss of essential roosts, especially those in caves, appears to be the most important cause of North American bat decline and endangerment. Millions of bats have been lost from single caves, initially due to saltpeter extraction for gun powder, and later when they were further altered for tourism. Some caves were even burned due to exaggerated fear of bats.
In recent decades, there have been numerous opportunities to recognize mistakes from the past as well as opportunities for the future. One way to address these issues is through cave management training. Bat Survey Solutions held a workshop in San Marcos, Texas from May 7-9, where attendees were provided with examples of a variety of case histories and what they’ve taught us.
Monitoring Impacts of White-Nose Syndrome (WNS): Decline and Stabilization in a Little Brown Bat Nursery Colony,
A Case History from New York
By Merlin D. Tuttle
A New York nursery colony of little brown myotis (Myotis lucifugus) offers a window of opportunity for monitoring the impact and hoped for recovery of this recently devastated species. The colony occupies seven four-chamber, nursery-style bat houses provided by Lew and Dorothy Barnes. The houses were mounted on two sides of their barn near Lake Erie in western New York in the spring of 1995. By July 16, 1997 they had attracted 1,075 little brown myotis. Often aided by professional biologists, regular emergence counts were made between 1997 and 2013, providing potentially invaluable baseline data on WNS-induced population impacts.
Merlin Tuttle’s Bat Conservation is the most recent contribution by Merlin Tuttle to the world of bats. With over 60 years of in-depth knowledge and experience Merlin Tuttle, renowned bat expert, educator and wildlife photographer founded MTBC with one true goal in mind; teaching the world to understand and appreciate the vital contributions bats make to human beings and the world we live in.