Bat Workshops:

BCI's and BCM's various workshop events from across the country...


John Chenger • Bat Conservation and Management, Inc.
Bat Movie Collection

I realize that it is difficult to visualize some of the projects we do. My work has taken me to many special places allowing me to witness and even record some truly amazing places and fascinating events. I hope these clips drive the imagination of people who might not otherwise have the opportunity to visit these places and witness these events in person.

The movie collection is migrating...please see the latest videos on BCM's Bat Channel on Vimeo!

getquicktimeThese movie files are LARGE because resolutions have been kept high in order to distinguish detail (such as bats in flight). Problems playing movies? Download them to your disk (right click) and make sure to use the most recent Quicktime Player. Newest movies require the latest version of Quicktime. MOV files may play right in your browser, but newer m4v files may automatically be saved in your downloads folder, check before you click links twice thinking nothing happened. If the large movies stutter, try the small version if available. All movies © 1999-2014 by John Chenger unless noted. Permission must be obtained in writing for any duplication, broadcast, or presentation of any movie, clip, or frame.


Mission: Bat Camp

Pennsylvania 2004. This began innocently when I noticed Janet using the ANABAT with serious determination and immediately envisioned the perfect sound track.

Mission:BatCamp (small)

File 4.2 M at 320x240

Mission:BatCamp (large)

File: 27.4 M at 720x480


Condo/Church Visit

Pennsylvania 2004. We visit the original Bat Condo in the northeast. Afterwards we head into the church attic for a look into THE nursery colony of central PA, then witness the dawn return at 5:30 AM.

Condo/Church Visit:

File: 14.1 M at 320x240


Acoustic Monitoring

Pennsylvania 2005. This was the first BCI Acoustic Monitoring Workshop in the East. Over-the-top netting yielded every available species except silver-haired. ANABAT, Pettersson, zip-lining, light tagging, extension cords, oh my!

Acoustic Workshop:

File: 4.8 M at 320x240


Out for a Walk

Pennsylvania 2005. Three field trips: the habitat assessment walk, trapping at the Canoe Creek Mine, and wraps up with one of the favorite net sites, Huntingdon Rocks.

Out for a Walk:

File 5.5M at 320x240


Bring On The Night

Pennsylvania 2006. The JV bat house emergence, bat house building, and the Canoe Creek Mine tour.

Bring On The Night:

File: 68M at 1280x720


2007 Bat Workshop

Pennsylvania 2007. I tried to get a little bit of everything in this video; pretty tough to condense 5 days into 2:32, but here it is.

2007 Bat Workshop

File: 14M at 960x540


2008 BCM Workshop

Pennsylvania 2008. Toasty hot attics, chilly cold mine passages and countless forest roads, triple-high poles, stream corridors, bat boxes, wetlands, mist nets, cliffs, and harp traps in between as we meet over 900 individuals of 6 bat species.

New Souls for Bat Research

File: 109M at 960x540

New Souls for Bat Research (small)
File: 26M at 480x272.


2005 Arizona BCM

Arizona 2005. A good overview of most of the activities during the AZ BCM.

BCI AZ 05 Short

File: 6.1M at 480x360

BCI AZ 05 Full

File: 67.3M at 640x480


Lava Land

California 2008. When our whirlwind workshop ended, we had caught nearly every bat species in northern CA, thanks much to the unique lava cave topography covering Lava Beds National Monument and a few good ice caves that are the only source of water for miles.

Lava Land

File:46M at 960x540


Bat Camp Blues

Kentucky 2006. Now that the ticks and chiggers have been scraped off, it's time to relive some of the action of the KY Workshop. Mammoth Cave, Coach, James netting, artificial trees, and even fireworks. Late night music provided by Chris Isaac.

Bat Camp Blues:

File: 27M at 1280x720


Scenes from an Acoustic Workshop

Kentucky 2007. Co-led by the icons of bat detector analysis software; Archmage of the ANABAT, Chris Corbin and the Sultan of SonoBat, Joe Szewczak. The Acoustic Workshop is logistically intense since a completely independent crew must handle catching bats for participants to record, zipline, and light tag.

Acoustic Workshop:

File 20.6M at 960x540

Bat Swarms and Trapping:

Fall swarm activity at some of the classic winter sites in Pennsylvania...



Bat Trapper II

CS & M Mine, October 2001. One of the largest known bat hibernation mines in Pennsylvania. A high resolution G3 night vision camera was used with infrared lighting illuminating the abandoned mine.

Bat Trapper II

File 6.1M at 240x160


Bat Trapper III

US Steel Mine, October 2002. One of the largest known bat hibernation mines in Pennsylvania. A high resolution G3 night vision camera was used with supplemental infrared lighting.

Bat Trapper III:

File 5.7M at 640x480


Bat Trapper IV

ANF Cave, October 2002. A small sandstone cave in Pennsylvania. The cave entrance is a small pit UNDER the traps. A high resolution G3 night vision camera was used with supplemental infrared lighting.

Bat Trapper IV:

File: 4.5M at 640x480


Elizabeth Mine

October 2006. Second largest hibernacula in Vermont. Stare closely to see bats swarming in the top center of the frame at a distance of hundreds of feet. Filmed with a G3 night vision scope on a VHS tape.

Elizabeth Mine 2002:

File: 24M at 640x480


Deadly Fungus Marches Across the Northeast,
Spelling Doom to Millions of Bats

Every autumn like clockwork, bats have filled the night skies outside caves and other cold-air traps as populations leave their summer habitat and prepare for months of quiet hibernation. But time has run out for many colonies, and others are unwittingly practicing this instinct-driven swarm perhaps for the last time. This is a spectacle that few humans have ever witnessed, and fewer still completely understand.

Late summer/early fall swarming behavior begins long after dark each night and lasts for several hours. In the swarms, bats swirl and dive, wheeling with chaotic purpose above and around underground overwintering sites. Scientists believe that the swarms contain mixed sex flocks that are coming together for the first time all year so males and females can mate, ensuring future generations of temperate, cave-dwelling bats. There may also be a behavioral component to this melee where females teach young of the year about the locations of area hibernacula, or so the “genetic memory” is preserved in the population to document alternate winter roosts.

According to observations in September and October 2009, fall swarms have disappeared across much of the northeastern U.S. In February 2006, a fungus new to science was discovered growing on the faces and wing membranes of hibernating cave bats. First documented near Albany NY, the fungus has spread to bat populations in nine states, north to Vermont and New Hampshire and as far south and west as Virginia and West Virginia. Dubbed "white-nose syndrome" for the prominent halo of fungal growth on bat muzzles, the fungus appears to interfere with normal hibernation physiology. Bats need to maintain extremely low temperatures and metabolisms in order to survive on just a few grams of fat all winter. Infected bats become irritated by the fungus and wake too frequently, and burn through their limited fat reserves long before spring when their insect food is once again available. Bats are starving to death on the roost, or perishing on the winter landscape in failed attempts to find food to survive. Population declines up to 100% have been recorded for many colonies. This fall, the airspace outside their hibernation sites will be eerily quiet and whole species may become extirpated from large swaths of North America as this destructive fungus continues to spread.

Like the cliff swallows of San Juan Capistrano and the monarch butterflies in the mountains of Michoacan, northeastern bat species are disappearing. Passenger pigeons became extinct at the turn of the last century. Could cave-dwelling bats wink out of existence during this century? And, because this is a nocturnal phenomenon, will anyone notice? And, because it involves bats, will anyone care?


Long Run 1

Long Run Mine, October 2006. The largest known bat hibernation mines in Pennsylvania. Plenty of disturbance during filming and multiple entrances made for a depressed swarm.

Long Run 1:

File: 5.4M at 640x480


Long Run 2

Long Run Mine, October 2006. Another view of the fall swarm. Largest known hibernacula in PA with 100,000+ hibernating bats in 2007.

Long Run 2:

File: 4M at 640x480


Harlensburg Roadkill

September 2004. Unintended consequences of managing a cave for bats along a busy highway. Video by Cal Butchkoski, PGC.

Harlensburg Roadkill:

File: 13M at 720x480


Antenna Whack

Pennsylvania 2006. Bats whacking the car antenna using the super slow motion feature of the Sony camera. Go frame by frame and watch bats try to "catch" the antenna.

Antenna Whack:

File: 9M at 1280x720


Canoe Creek '04

August 2004. One of the earlier videos of the bat swarm at Canoe Creek Mine, Canoe Creek State Park, Pennsylvania. Canoe Creek 2004:

File: 4M at 720x480


Canoe Creek '08

August 2008. Fall bat swarm at Canoe Creek Mine, Canoe Creek State Park, Pennsylvania.

Canoe Creek 2008:

File: 66M ; image: 960x540


Canoe Creek '09

August 2009. Fall bat swarm at Canoe Creek Mine, Canoe Creek State Park, Pennsylvania. 35,000 hibernating bats surveyed 2008.

Canoe Creek 2009:

File: 46M at 960x540


CS & M Mine '09

August 2009. Fall bat swarm at one of the largest known swarms in PA. 40,000+ hibernating bats surveyed 2007. Special thanks: Janet Tyburec

CS & M Mine 2009 (full size)

File: 143M ; image: 1280x720

CS & M Mine 2009 (small size)

File: 13M ; image: 480x272


Gateway Mine '09

August 2009. Fall bat swarm at one of the largest known swarms in PA. 40,000+ hibernating bats surveyed 2007. Special thanks: Janet Tyburec

Gateway Mine 2009 (full size)

File: 187M ; image: 1280x720

Gateway Mine 2009 (small size)

File: 17M ; image: 480x272


Laurel Caverns '09

August 2009. Fall bat swarm at the largest commercial cave in PA. 3,000+ hibernating bats surveyed 2007.

Laurel Caverns 2009 (full size)

File: 93M ; image: 1280x720

Laurel Caverns 2009 (small size)

File: 23M ; image: 480x272


Layton Fireclay Mine '09

August 2009. Fall bat swarm at one of the larger winter sites in PA. 4,500+ hibernating bats surveyed 2007.

Layton Fireclay Mine 2009 (full size)

File: 263M ; image: 1280x720

Layton Fireclay Mine 2009 (small size)

File: 24M ; image: 480x272


US Steel Mine '09

September 2009. Fall bat swarm at one of the largest winter sites in PA. 15,000+ hibernating bats surveyed 2007.

US Steel Mine 2009 (full size)

File: 149M ; image: 1280x720

US Steel Mine 2009 (small size)

File: 14M ; image: 480x272


Mummy Cave '09

September 2009. Small bat swarm at a small sandstone cave in NE Ohio. Mummy Cave 2009 (full size)

File: 98M ; image: 960x540

Mummy Cave 2009 (small size)

File: 24M ; image: 480x272


Salisbury Mine '09

September 2009. Fall swarm at an abandoned mine that usually shelters 3,000 bats each winter.

Salisbury Mine 2009 (full size)

File: 180M ; image: 960x540

Salisbury Mine 2009 (small size)

File: --M ; image: 480x272


Barton Cave '09

September 2009. Very small swarm at a natural cave that usually shelters 600 bats each winter.

Barton Cave 2009 (full size)

File: 50M ; image: 960x540

Barton Cave 2009 (small size)

File: 18M ; image: 480x272


Glen Lyon '08 and '09

October 2008 and 2009. One of the largest fall swarms in the state, before WNS and the very next dismal fall after WNS impact where the swarm was nearly nonexistent.

Glen Lyon Then and Now (full size)

File: 250M ; image: 960x540


Durham Mine '09

September 2009. Fall swarm at an abandoned mine that usually shelters 10,000 bats each winter. Unfortunately the swarm was dismal on this visit suggesting WNS impact may have occurred during January/February 2009. Special thanks: Todd Sinander

Durham Mine 2009 (full size)

File: 22M ; image: 960x540


Canoe Creek '09

October 2009. Fall swarm at an abandoned mine that usually shelters 35,000 bats each winter. Greg Turner videotaped this very heavy pre-WNS activity.

Canoe Creek 2009 Turner (full size)

File: 75M ; image: 960x540

Miscellaneous Batty Video:

Emergences, dawn returns, and other fun items...



Tucson Bridge Emergence

May 2009. Watch this urban wildlife wonder: tens of thousands of free tailed bats in Tucson, AZ.

Tucson Emergence 2009

File: 58M; image: 960x540

Tucson Emergence (small size)

File: 13M; image: 480x272


Durham Telemetry

April 2004. Home movie documenting a large spring migration radio tracking effort in Eastern PA.

Durham Telemetry Project

File: 45M ; image: 720x480


Carlsbad Emergence

May 2005. A simple clip watching the tens of thousands of free tailed bats emerge one summer evening at Carlsbad Caverns, NM.

Carlsbad Emergence

File: 38M ; image: 640x480


JVHS Bat Flight

August 2002. A simple clip of little brown bats emerging from bat houses. The houses have since been moved off the building and are now behind the football field.

JVHS Bat Flight

File: 27M ; image: 720x480


JVHS Bat Houses

August 2006. An updated HD clip of little brown bats emerging from bat houses.

JVHS Bat Houses

File: 5M; image: 1280x720


In a Bat House

July 2001. A simple clip of little brown bats emerging from a bat houses at Clear Creek State Park, PA.

In a Bat House

File: 6M; image: 240x160


Mass Exit

July 2001. A simple clip of 4,000 little brown bats emerging from buildings in downtown Newport, PA.

Mass Exit

File: 4.2M; image: 160x120


Evening Emergence

August 2008. An updated view of the massive emergence in Newport, PA. Evening Emergence 2008

File: 254M; image: 1280x720

Evening Emergence (small size)

File: 21M; image: 480x272


Canoe Creek Attic

August 2004. Inside the attic of building managed for about 20,000 bats.

In the Church Attic

File: 3.2M ; image: 720x480


Canoe Creek Attic Baffles

August 2004. A closer look at some of the roost baffles in the Canoe Creek Church attic.

Attic Baffles

File size: 4.3 M ; image size: 720x480


Dawn Return

July 2001. A simple clip of hundreds of bats returning to the Canoe Creek Church summer roost at Canoe Creek State Park, PA.

Dawn Return 2001

File: 3M; image: 320x240


Church Swarm

August 2004. An updated look of the dawn return into the Canoe Creek attic. Recently the return has been less impressive and this may be the best video available pre-WNS impact.

Church Swarm 2004

File size: 3.2M ; image size: 720x480


Bats at a Pool

May 2005. Free-tailed bats drinking from the swimming pool at the Southwest Research Station in Arizona. Pool Bats

File: 11M; image: 640x480


Bats at the Hummingbird Feeder 2009

May 2009. Classic video of nectar bats getting a free meal of sugar water in AZ. Bats at the Hummingbird Feeder

File: 59M; image: 960x540


Removing a Bat From a Mist Net - Easy

August 2007. No matter how tangled it appears, removal is ALWAYS the same. Feet, head, forearm, fingertips, in that order.

Bat Removal Easy

File: 15M; image: 960x540


Removing a Bat From a Mist Net - Harder

August 2007. Again, removal is systematic. Feet, head, forearm, fingertips, in that order. Professionals can often do this in 10 seconds without harming the animal.

Bat Removal Harder

File: 15M; image: 960x540


Mammoth Anti-Bat Gate

August 2006. Because bats slow down at gates, the wicked strong airflow at Mammoth Cave N.P. occasionally repels bats. This is what is happening at 0:48 as this bat ducks in and out of the airflow.

Mammoth Gate

File: 10M; image: 1280x720


Bat Biologists at Play

July 2007. Bat people may work all night but they certainly don't sleep all day. Cal Butchkoski, John Chenger, and Matt Hopkins trade bats for boats. Yough

File: 60M; image: 640x480


Small-footed Bat Roost

July 2008. Eastern Small-footed (Myotis leibii) bats emerging from a small talus field. Predators are faced with a real needle in a haystack. Don't blink or you will miss these tricky bats.

Small footed Roost

File: 29M; image:960x540


Barn Harp Trapping

July 2004. Indiana bats were radio tracked to this barn and one solution to determine species composition was to harp trap it; 30' in the air using our 3H mist net poles.

Barn Trapping

File: 43M; image:640x480


Bats at the Paradise Feeder 2010

June 2010. Updated video of nectar bats getting a free meal of sugar water in AZ.


File: 63M; image: 960x540


Bats at the SWRS Feeder 2010

June 2010. Updated video of nectar bats getting a free meal of sugar water in AZ.


File: 64M; image: 960x540


Bats at the SWRS Pool 2010

June 2010. Updated video of bats drinking and feeding at a swimming pool in AZ.


File: 77M; image: 960x540


Southeast BDN Time-lapse Meeting

February 2013. Just a camera set in the corner shooting 1 frame every 2 seconds of folks coming and going. SBDN2013

File: 215M; image: 1920x1080

Cave and Mines:

Emergences, dawn returns, and other fun items...These may or may not have something to do with bats, but they are all underground...



Discovery of Ruth Cave

Summer 1990. Art Pettit recounts finding finding the major sections of Ruth Cave. This was an ambitious project to drag huge VHS camera gear into the cave and took two trips to get the underground footage.

Ruth Cave

File: 334M; image: 720x540

Ruth Cave (small size)

File: 114M; image: 480x360


Copperhead Cave

Summer 1990. This video was created when a quarry operation threatened to remove this major western PA cave. Footage was salvaged from a deteriorating VHS tape.

Copperhead Cave

File: 69M; image: 720x540

Copperhead Cave (small size)

File: 23M; image: 480x360


Hineman Cave Gating

Summer 1990. Bob Prowel, Kim & Tom Metzgar, Sam Slee during the excavation and stabilization effort of a major PA cave. Salvaged from VHS tape.

Hineman Cave Gating

File: 155M; image: 720x540

Hineman Cave Gating (small size)

File: 52M; image: 480x360


Roxbury Mine Gating

Fall 2001. Home movie documenting gating the largest hibernacula in CT. Roxbury Gate 2001

File: 12M ; image: 160x120


Sharer Cave Gate

Summer 2005. Footage shot while Nittany Grotto and others build a bat-friendly cave gate in central PA.

Sharer Gate

File: 8M; image: 720x480


Bat Mining

January 2009. This is very rare candid footage taken pre-WNS impact in two huge limestone mines near Pittsburgh during an actual PGC winter bat survey. Bat Mining 2009

File: 62M; image: 960x540


Coal Mine, Tioga County

February 2010. This is very short trip into what surely is a large coal mine that had a fair number of bats captured during the fall swarm. A few bats with WNS symptoms were found.

Tioga County Mine 2010

File: 50M; image: 960x540

White Nose Syndrome:

Movies that are directly related to WNS...



Aeolus Bat Cave

March 2008. HD video at the entrance of what was possibly the largest hibernacula in the northeast US documenting the result of WNS exposure. Footage by VTFW, edited by BCM.

Aeolus Bat Cave

File: 70M; image: 960x540


Shindle Iron Mine

January 2009. White Nose Syndrome Sampling Trip Video. HD video underground Mifflin County, PA during a midwinter WNS investigation trip by the PA Game Commission, Bat Conservation and Management, and Bucknell University. BCM

Shindle Iron Mine Video

File: 158M; image: 960x540


Glen Lyon WNS Emergence

January 2010. John Chenger witnessed small pulses of bats emerging from this mine a full 3 months early in search of food that just isn't there.

Glen Lyon Emergence 01/16/10

File: 38M; image: 1280x720


Tresckow WNS Emergence

January 31, 2010. A steady stream of bats emerge from this mine on a cold day in January 3 months early and die. Some images may be considered graphic.

Tresckow Emergence 01/31/10

File: 109M; image: 1280x720


Tresckow WNS Emergence

February 5, 2010. A warmer day; more bats are witnessed airborne, roosting under rocks, dying on the sides of trees. At least a thousand are dead within a few hundred feet of the entrance, and the mine air now smells of dead animals.

Some images may be considered graphic.

Tresckow Emergence 02/05/10

File: 164M; image: 1280x720


Tresckow WNS Emergence

February 22, 2010. Similar to 2/5 bats are constantly airborne. The mine is entered for the first time. About 5,000 bats are hibernating and at least a thousand carcasses are scattered throughout 500' of passages.

Some images may be considered graphic.

Tresckow Mine 02/22/10

File: 198M; image: 960x540


Hellhole Cave WNS Emergence

January 27, 2011. Vist to the Natural Entrance the next day after a heavy snowfall. Kestrels and coopers hawks picked off 13 of 15 bats that crossed the fence in the hour we watched.

Hellhole 1/27/11

File: 100M; image: 960x540


Lawrence WNS Emergence

January 31, 2011. A major Indiana bat winter site in northwestern PA. Bats choose to emerge from this upper, warmer entrance. Nearby a hungry possum looks for easy meals.

Lawrence Mine 1/31/11

File: 100M; image: 960x540


Canoe Creek Mine WNS Emergence

February 1, 2011. Almost constant activity at the #3 entrance and dying bats are starting to gather in the rock faces. PA's most celebrated model site of Indiana bat management will soon be decimated.

Canoe Creek 2/1/11

File: 90M; image: 960x540


Canoe Creek Mine WNS Emergence

March 5, 2011. Consistant activity allowed us to capture striking high-speed footage of uncoordinated bats near death colliding with the gate, signs, and even each other. Reaching the parking area 3,000' away, a MYOLUC tries to climb into Todd's car.

Canoe Creek 3/5/11

File: 150M; image: 960x540