Bats, Bat Houses, and White-Nose Syndrome 2009

Posted on 2009-03-27 by admin

Mosquito control is a perennial topic on the Flatbush Family Network, one of the numerous email discussion groups which cover the different neighborhoods of Brooklyn. Bat houses invariably come up as a way of attracting a natural predator to keep mosquito populations in check. Here I’m reprising and updating my posts on these and related topics from last year.

White-Nose Syndrome (WNS)

Last Spring I wrote about White-Nose Syndrome (WNS). A breakthrough that occurred just in the past few months is that the “White-Nose” has been identified as a group of previously unknown species of Geomyces fungus. It’s still unknown whether it’s a symptom – such as an opportunistic infection – or a cause or contributor.

Bats exhibiting white-nose syndrome in Hailes Cave, Albany County, NY, one of the first caves in which WNS was observed. Photo: Nancy Heaslip, NYS DEC.

Bob Hoke of the District of Columbia Grotto (DCG) of the National Speleological Society (NSS) maintains an excellent chronology of WNS news and understanding. WNS has already killed hundreds of thousands of bats across the northeast over the past four winters. Mortality has been as high as 90% in some caves. It’s estimated that 75% of northeastern bats have died in just four years. Unfortunately, it continues to spread; for the first time, it’s also been found or suspected in New Hampshire, New Jersey, Pennsylania, Virginia and West Virginia.

Map of occurrence of White Nose Syndrome by county as of March 4, 2009. WNS was later confirmed in Virginia. Credit: courtesy of Cal Butchkoski, Pennsylvania Game Commission

Because of the high mortality, rapid spread, and still-unknown causes of the disease, the U.S. Fish and Wildlife Service (US FWS) has issued a cave advisory to suspend all caving activities in affected states, and take precautions in states where WNS has not yet been detected:

The evidence collected to date indicates that human activity in caves and mines may be assisting the spread of WNS. Therefore, the U.S. Fish and Wildlife Service is recommending actions to reduce the risks of further spread of WNS:

A voluntary moratorium on caving in states with confirmed WNS and all adjoining states;

Nationally, in states not WNS-affected or adjoining states, use clothing and gear that has never been in caves in WNS-affected or adjoining states;

State and federal conservation agencies should evaluate scientific activities for their potential to spread WNS; and

Nationally, researchers should use clothing and gear that has never been in caves in a WNS-affected or adjoining state.

This also applies to mines used by cavers.

These recommendations will remain in effect until the mechanisms behind transmission of WNS are understood, and/or the means to mitigate the risk of human-assisted transport are developed.

There was a big thing that came out in the environmental reports last year that chemical mosquito killers are quite bad for the environment and killed more than just mosquitoes. They might even be part of the reason why there is a bacteria/virus killing off northeastern bats. Although, scientists haven’t found anything conclusive it seems.
– via Flatbush Family Network

WNS research is ongoing, but it’s still not known what the cause is. A plausible explanation is immunodeficiency caused by environmental contamination, such as insecticides sprayed for West Nile Virus, but again, that’s just one of several hypotheses being explored by researchers. A pathogen such as a virus, bacteria or fungus is likely due to the patterns by which it’s spreading.

Bat Houses

Bat houses seem like a great idea. At night, bats eat about 1,000 pesky insects an hour. I don’t know how one attracts bats to your bat house but I’ve seen them in the evening in Prospect Park, amazing little creatures that they are.
– via Flatbush Family Network

I wrote about bat houses last year. Bats have specific requirements for roosting sites. Most of the houses I’ve seen commercially available are too small or lacking in other requirements. The National Wildlife Federation (NWF) article, “Why I Built a Bat House,” contains detailed instructions for building a house that meets current knowledge about bats roosting needs.

The bat house I purchased last year from Bat Conservation International before I installed it on the side of the second floor porch – my “tree fort” – at the back of my house.

Note that this is the time of year when bats are looking for their “summer homes.” I put mine up mid-April last year, which was a little late. I’m hoping they find it and set up house this year!

General information about bats

Is there ANY danger to my 4 year old son? Do bats poop/pee/spit anything bad for him? Do they really only come out at night?
– via Flatbush Family Network

Bats really do only come out at night. You’re most likely to see them at dusk, when they leave their roosts, and dawn, when they return. At the end of last summer, I saw a few on my block flying amidst the gaps between the canopies of the street trees. They seemed to be feasting on the insects attracted to the street lights.

Many people are concerned about rabies. While sensible caution is warranted, the risk is extremely low. In New York City, you’re more likely to contract West Nile Virus (WNV), which bats help combat by eating mosquitoes which carry the virus. If you see any normally nocturnal animal – such as a bat, raccoon or opossum – out in the open during the day, keep children and pets away from it and notify animal control by calling 311.

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Links

Bats

Bats of New York, Eileen Stegemann and Al Hicks, Conservationist, February 2008, NYSDEC
Bat Conservation International (BCI)

Bat Houses

Why I Built a Bat House, Carla Brown, National Wildlife Federation (NWF) (H/T Sara S. via Flatbush Family Network)
Bats Wanted, Al Hicks and Eileen Stegemann, Conservationist, February 2008, NYSDEC
The importance of bat houses, Organization for Bat Conservation
The Bat House Forum

White-Nose Syndrome

An excellent chronology of WNS is maintained by Bob Hoke of the District of Columbia Grotto (DCG) of the National Speleological Society (NSS).

White-Nose Syndrome Confirmed in VA Bats, WHSV, Richmond, VA, 2009-04-02
Cave activity discouraged to help protect bats from deadly white-nose syndrome, Press Release, U.S. Fish & Wildlife Service, 2009-03-26
Fungus Kills About 90 Percent Of Connecticut’s Bats, Rinker Buck, Hartford Courant, 2009-03-18 (H/T NewYorkology via Twitter)
Newly Identified Fungus Implicated in White-Nose Syndrome in Bats, Press Release, U.S. Department of the Interior, U.S. Geological Survey (USGS), 2008-10-31
Bats dying off across western Maine, Maine Sun Journal, 2008-07-19 (H/T Center for Biological Diversity)
Dying Bats in the Northeast Remain a Mystery, USGS Newsroom, 2008-05-09
First It Was Bees, Now It’s Bats That Are Dying, Natural News, 2008-04-11
Bats in the Region Are Dying From a Mysterious Ailment, Litchfield County Times, 2008-04-03
Bats Perish, and No One Knows Why, New York Times Science Section, 2008-03-25
Bat Die-Off Prompts Investigation, Environment DEC, March 2008, NYSDEC

White-nose Syndrome Threatens New York’s Bats, New York State Department of Environmental Conservation (NYSDEC)
White-Nose Syndrome, Pennsylvania Game Commission (PGC)
White-Nose Syndrome in bats: Something is killing our bats, U.S. Fish & Wildlife Service, Northeast Region

Mystery Disease Kills U.S. Bats, Bat Conservation International
Bat Crisis: The White-Nose Syndrome, Center for Biological Diversity
White Nose Syndrome Page, Liaison on White Nose Syndrome, National Speleological Society (NSS)
Something is killing our bats: The white-nose syndrome mystery, U.S. Fish and Wildlife Service

Wikipedia: White-nose syndrome

Gardening by Satellite

Posted on 2008-12-16 by admin

Here in Brooklyn, at the end of last week and into the weekend, we got drenched with a couple days of rain. Fellow gardeners in Massachusetts, Vermont, New Hampshire, and Maine, I sympathize.

In this image, snow is red and orange, while liquid water is black. By the time this image was taken [On December 13], the top layer of ice was undoubtedly starting to melt, and the resulting watery ice ranges from dark red to black. The icy region extends over parts of Massachusetts, Vermont, and New Hampshire … The normally green-blue tone of plant-covered land is nearly black throughout most of New Hampshire, the state most severely affected by the storm.
– New England Ice Storm, NASA Earth Observatory

If you’ve blogged about the ice storm in your area, give us a link!

Links

New England Ice Storm, NASA Earth Observatory

The following Garden Bloggers reported on the ice storm where they are.
Common Weeder, Heath, Massachusetts
Garden Path, Scarborough, Maine
The Vermont Gardener, Marshfield, Vermont

Northeastern Bats in Peril

Posted on 2008-03-18 by admin

Bat House at the East 4th Street Community Garden in Kensington/Windsor Terrace

A discussion thread about mosquito control on the Flatbush Family Network led to this question:

I heard that bat houses are a possible long-term solution for mosquitos. I guess you put a bat house up and hope that they come and live there. It can take a few seasons to get them to do it but an average bat eats lots of mosquitos a day. Seems strange to try and seduce bats to your house but those mosquitos are terrible. Anyone else heard about these bat houses?

The photo above is of a bat house in the East 4th Street Community Garden, which I visited for the first time last November. One of the questions they get when they explain what it’s for is, “Where do you get the bats?” If you build it, they will come. We have bats here in Brooklyn. Whether we will continue to have them is in question.

A newly emerging epidemic is wiping out bat colonies. First discovered last winter in a single cave near Albany, New York, this winter it’s been found to have spread to more locations, including sites in Vermont and Massachusetts. Mortality has been as high as 90% in some caves:

Thousands of hibernating bats are dying in caves in New York State and Vermont from unknown causes … The most obvious symptom involved in the die-off is a white fungus encircling the noses of some, but not all, of the bats. Called “white-nose syndrome,” the fungus is believed to be associated with the problem, but it may not necessarily contribute to the actual cause of death. It appears that the affected bats deplete their fat reserves months before they would normally emerge from hibernation and die as a result …

“What we’ve seen so far is unprecedented,” said Alan Hicks, DEC’s bat specialist. “Most bat researchers would agree that this is the gravest threat to bats they have ever seen. We have bat researchers, laboratories and caving groups across the country working to understand the cause of the problem and ways to contain it.”
– Bat Die-Off Prompts Investigation, New York State Department of Environmental Conservation

Bat populations are particularly vulnerable during hibernation as they congregate in large numbers in caves-clusters of 300 per square foot in some locations-making them susceptible to disturbance or disease. The vast majority of the hundreds of thousands of bats known to hibernate in New York do so in just five caves and mines. Because bats often migrate hundreds of miles to their summer range, effects on hibernating bats can have significant implications for bats throughout the Northeast.

Indiana bats [Myotis sodalis], a state and federally endangered species, are perhaps the most vulnerable. Half the estimated 52,000 Indiana bats that hibernate in the state are located in just one former mine-a mine that is now infected with white-nose syndrome. Eastern pipistrelle [Perimyotis subflavus], northern long-eared [Myotis septentrionalis] and little brown [Myotis lucifugus] bats also are dying. Little brown bats, the most common hibernating species in the state, have sustained the largest number of deaths.

Bat Houses, April 13, 2008
Other posts about bats

Links

Chronology
Bat Die-Off Prompts Investigation, New York State Department of Environmental Conservation
Mystery Disease Kills U.S. Bats, Bat Conservation International
Something is killing our bats: The white-nose syndrome mystery, U.S. Fish and Wildlife Service
Wikipedia: White-nose syndrome

Flatbush Family Network (requires membership)

News

Dying Bats in the Northeast Remain a Mystery, USGS Newsroom, May 9, 2008
First It Was Bees, Now It’s Bats That Are Dying, Natural News, April 11, 2008
Bats in the Region Are Dying From a Mysterious Ailment, Litchfield County Times, April 3, 2008
Bats Perish, and No One Knows Why, New York Times Science Section, March 25, 2008

Southern Exposure Nursery, Rutland, Massachusetts

Posted on 2007-07-24 by admin

Southern Exposure Nursery, Rutland, Massachusetts

Cow and Chicken at Southern Exposure Nursery

On our way back from Gardener, Massachusetts this weekend, we stopped at Southern Exposure Nursery in Rutland, at the recommendation of our hostess. The weather was perfect.

Even this late in the season, they had an excellent selection of perennials.