# Presentation: 105667

## What’s Happening to Bats in the Northeast?An Update on White-nose Syndrome

- David Stilwell
- U.S. Fish and Wildlife Service
- Many Slides Originally from Alan Hicks
- New York State Department of Environmental Conservation

## What is White-nose syndrome (WNS) ?

- WNS is a name we have given to an as yet unidentified agent or agents that is apparently causing mass mortalities at a growing number of bat hibernacula in and around NY.

- Bats are also flying near affected sites during daylight hours and are often found dead near the entrances or on nearby structures.   Day flying bats are reported more frequently nearer the  hibernacula,  and as winter progresses beyond late January.  Affected animals have substantially depleted fat supplies, which are exhausted long before food is available in the spring.

- The most obvious symptom of the problem is the presence of a white fungus around the nose of some,  _**but clearly not all**_ affected animals. The fungus can also be present on the wing or tail membrane.

- Affected animals tend to shift to roosts in colder regions of the caves or mines,  and concentrate in unusually high numbers near the entrances. This is often within the zone of light penetration.

## 2006

- Caves not searched

- Contaminated Caves 2006

- 2-16-06
-  **First Observation** **Howe Cave**
- WNS photographed.  Up to 18 dead bats per trip were observed.
*Paul Ruben *

## 2007

**Increasing reports of bats on the winter landscape beginning in late January**

- 1-18-07
-  **First Observation** **Schoharie Caverns**
- Many bats unusually close to the entrance

## 2007

**4/25/07**
**Knox Cave**
- 350 carcasses collected
- WNS observed

**3/14/07**
**Standard winter survey of Hailes Cave **
- Thousands seen dead.
- White nose on half of the survivors

**3/28/07**
**First Report Gages Cavern **
- 805 carcasses eventually collected. No white noses observed

## 3/14/07 Hailes Cave Survey

- Roughly half the bats observed had a white fungus around the muzzle, It had not been noticed at either Schoharie Cavern, or Gages Cavern, although it was seen on animals at Knox.

## 3/14/07 Hailes Cave Survey

- Carcasses, or parts of carcasses, were found on most rocks emerging  from the resurgent stream.  Examinations to date (not yet complete) indicated that  body parts represent  at least 600 animals.

## 3/14/07 Hailes Cave Survey

- Among the missing were all 685 Indiana bats (*Myotis sodalis*).  Since the discovery of this species at Hailes Cave By Donald Griffin during the 1930’s,  this was the first winter survey that we are aware of where they were not observed.   *M. sodalis* have been absent during all three visits since.

## 2007 Surveys (primarily routine Indiana bat surveys)

- 2007 Surveys (primarily routine Indiana bat surveys)

- Not Surveyed

- No mortalities

- Small scale mortalities

- Large scale mortalities

- 100 km

*Sharer Cave*
- This event  was believed to be flooding related.

*Aeolus Cave*
-  A few bats were found dead in the entrance room; a rather common occurrence since the 1930’s.

- Surveys of other sites demonstrated that the problem was limited in distribution.  Pink sites had evidence of mortalities.

*Merlin's Cave*
- About 50 bats reported dead.   This is a recently discovered cave.  These mortalities are suspicious.

## 2008 Surveys- As of 4/8/08

## Most sites checked to date within 80 miles of the 2007 caves are affected 

- Most sites checked to date within 80 miles of the 2007 caves are affected

- Currently Involves 400,000 to 500,000 Animals

## 2007-2008 Mortality Event 

| Site | # of  Live Bats (year) | # of Carcasses Recovered in 2007 | 2007 Survey | 2008 Survey | % Decline   |
| --- | --- | --- | --- | --- | --- |
| Hailes | 15,584 (2005) | count not yet complete | 6,735 | 1,400? | 91% |
| Gages | 968  (1985) | 805 | NA | 88 | 91% |
| Knox | 1,948 (2001) | 350 | NA | NA |  |
| Schoharie Caverns | 1,329 (2006) | 125 | 478 | 38 | 97% |

- 2007-2008 Mortality Event
- Percent Decline Based on Winter Survey Counts

## Photo by Merlin Tuttle, BCI 

- Photo by Merlin Tuttle, BCI

- Background and Biology

- Bat to bat transmission during fall swarm or pre-hibernation movements?
- Bat to bat transmission in hibernacula?
- Bat to bat transmission at maternity colonies?
- Cavers or researchers?

- How Might WNS be Spread?

## Indiana bats, and to a lesser extent little brown bats  typically hibernate in dense clusters. It is hard to imagine a condition more conducive to the spread of disease, if WNS is a disease. 

- Indiana bats, and to a lesser extent little brown bats  typically hibernate in dense clusters. It is hard to imagine a condition more conducive to the spread of disease, if WNS is a disease.

## No real answers to date
Bats are starving to death- very underweight, bats leaving hibernacula early
Involved researchers: virologists, mycologists, pathologists, bacteriologists, immunologists, toxicologists

- No real answers to date
- Bats are starving to death- very underweight, bats leaving hibernacula early
- Involved researchers: virologists, mycologists, pathologists, bacteriologists, immunologists, toxicologists

## Participating Researchers/Laboratories

- Boston University

- NYS DEC Pathology

- NYS Department of Health

- Columbia University

- Humboldt  State

- UC Davis

- USGS Wildlife Health Center

- USGS Ft Collins

- Colorado State

- University of Colorado

- Cornell University

- Indiana State

- Disney

- APHIS

- CDC

- Bucknell

- USFWS

## Summary

- WNS has persisted for at least 2 years at some sites.
- It appears to be killing 90+% of bats at these sites.
- There may be varied vulnerability among species and sites.
- It appears to be rapidly spreading (although we do not know what IT is or if/how it may be spread).
- Look for white fungus on noses or exposed membranes.  Remember that not all WNS sites have bats with white noses.
- Look for bats in unusual roosts, especially  near entrances.
- Monitor for winter reports of bats (*Myotis*) flying during the daytime, or roosting on buildings.

## What does this mean for the Indiana bat?

## Slide 19

## Indiana Bat Hibernacula in New York State 

- Indiana Bat Hibernacula in New York State

- (10 Sites)

- 4,000

- 9,000

- 2,000

- 0-50

- 700

- 38,000

- 100

- Confirmed affected

- Apparently /possibly(?) clean

## Indiana Bat Summary

- 7 Indiana bat hibernacula in NY and 2 in VT confirmed as affected
- ~10% of rangewide population affected to some degree
- Short-term effects appear to vary among sites
- Additional monitoring is needed

## What is the Service doing?

- Created a Webpage for information sharing http://www.fws.gov/northeast/white_nose.html
- General FAQ document
- Caver decontamination protocols
- Field equipment decontamination protocols
- Future sampling for additional research into cause/spread of WNS- T.B.D.
- Mapping caver/biologist movements vs. affected sites
- Tracking surveyed sites for presence/absence of WNS
- Holding weekly conference calls among Service and States
- Coordinating researcher calls when needed
- Applying for funding
- Assisting with permit needs/review for listed species issues
- Assisting with field work

## Next Steps???

- Summaries/reports from all involved labs to date- June 2008
- Meet with researchers to discuss other hypotheses, data needs, possible management strategies- June 2008
- Example data collection/research/monitoring options:
- Track known maternity colonies
- Fall swarming weight studies
- 2008-2009 “on” year for Indiana bat hibernacula surveys
- Additional surveys of other hibernacula
- Captive studies
- Contaminants

## Funding Opportunities

- Internal Service Sources- Regions 3 and 5 applied for 2 pots of money.  Region 4 may have applied as well.
- Opportunities for States
- Traditional S6
- Multistate Conservation Grant Program. ~4 million dollars.  0 Match.  Letter of intent due May 2nd
- Northeast Regional Needs Conservation Program
- Potential future competitive SWG grants

## Thank you for all of your involvement/help to date!