One Less Rodent In Tompkins Square Park

I've been away at a conference for a week in Las Vegas.  I returned to the city last night and went down to Tompkins Square Park this afternoon. 

Christo, the male of the pair that resides in the park, fly into a tree next to me within minutes of my arrival at the park.  He then went hunting and caught a rodent.  He then ended up into a tree where he roosted for the night.  As I was leaving, I saw an Eastern Red Bat.

What a nice homecoming back to New York City.


20161029RTHA01

20161029RTHA02

20161029RTHA03

20161029RTHA04

20161029RTHA05

20161029RTHA06

20161029RTHA07

20161029RTHA08

20161029RTHA09

20161029RTHA10

20161029RTHA11

20161029RTHA12

20161029RTHA13

20161029RTHA14

20161029RTHA15


Central Park's Oven

In the Ramble of Central Park is an area of the Lake called the Oven.  It has a patch of Jewelweed that attracts Ruby-throated Hummingbirds and Rose-breasted Grosbeaks during the fall migration.  It also attracted a Tennessee Warbler today as well.


2016092401

2016092402

2016092403

2016092404

2016092405

2016092406

2016092407

2016092408

2016092409

2016092410

2016092411

2016092412

2016092413


Fewer Bats

Now that we're in late September that number of bats seems to be declining at the Model Boat Pond.  Tonight I got 8 recordings of Big Brown Bats, 29 recordings of Eastern Red Bats and 29 recordings of Silver-haired Bats. Of course a single bat will have multiple recordings.  These number are a lot fewer than a few weeks ago, although the Silver-haired Bat number are the highest I've seen for this species.

20160922BATS01

20160922BATS02

20160922BATS03

 


Ratio Changes

Tonight, the ratio of Eastern Red Bats to Big Brown Bats recordings was 129 to 38, where last week it was an even split.  But I don't know if it was a change in the number of bats or if the Eastern Reds just hung out longer.  Last week, the Eastern Red Bats came out early, followed by the Big Brown Bats.  Tonight, the Eastern Red Bats stayed until it was very dark.

I have no idea if the number of bats has changed or if the food sources changed.  Unlike Bird Watching, which has a long history of citizen science and great databases (eBirds, Christmas Bird Counts, etc.), there are almost no resources for bats.  There are no hot spot maps for bats for example!  Or online records of when to expect different bat species to be present in Central Park.  This is going to take time to figure out!

20160907BATS01

20160907BATS02

20160907BATS03

20160907BATS04

20160907BATS05

20160907BATS06

20160907BATS07


Pale Male

I caught up with Pale Male after he had raided a squirrel's nest and taken a baby.  Luckily, I arrived after the damage had been done.


20160904RTHA01

20160904RTHA02

20160904RTHA03

20160904RTHA05

20160904RTHA06

20160904RTHA07

20160904RTHA08

20160904RTHA09

20160904RTHA10

20160904RTHA11

 


Model Boat Pond Bats

Tonight there continued to be a large number of bats at dusk flying around the Model Boat Pond. 

(Pale Male roosted on a building a block south of his nest.  He's done this two other nights this week.)

20160903BATS01

20160903BATS02

20160903BATS03

20160903BATS04

20160903BATS05

20160903BATS06

20160903BATS07

20160903BATS08

20160903BATS09

CI5I0265


Bats, Bats, Bats

My study of the bats at the Model Boat Pond in Central Park continues.  I used a flash to photograph the bats tonight.  I was able to get a few good shots of the bats.   I think it's going to take me weeks to learn how to shoot these bats!

There were one or two Silver-haired Bats in with the mix of Eastern Red Bats and Big Brown Bats. 

20160831BATS01

20160831BATS02

20160831BATS03

20160831BATS04

20160831BATS05

20160831BATS06

20160831BATS07

20160831BATS08

20160831BATS09

20160831BATS10

20160831BATS11

CI5I0446

CI5I0450

CI5I0472


Even more bats

I've somehow become addicted to watching the bats at dusk in Central Park at the model boat pond.  I even invested in a Echo Meter Touch bat detector so I can see spectrograms of the bat's echolocation sounds.  The detector is identifying (with 80% certainty) an almost even mix of Eastern Red Bats and Big Brown Bats.  The Eastern Red Bats appear earlier in the evening followed by the Big Brown Bats.

Walking around the lake and out the west side of the park, I was able to detect two more Eastern Red Bats and two more Big Brown Bats tonight.

20160829BATS01

20160829BATS02

20160829BATS03

20160829BATS04

20160829BATS05

20160829BATS06

20160829BATS07

20160829BATS08

20160829BATS09

20160829BATS10

20160829BATS11

20160829BATS12

20160829BATS13

20160829BATS14

20160829BATS15

20160829BATS16

20160829BATS17

20160829BATS18

20160829BATS19


Central Park Bats

This time of year, if you sit near the hawk bench at the Model Boat Pond at dusk, you'll see lots of Chimney Swifts feeding.  But as it gets darker, almost like magic, there are fewer and fewer swifts and in their place you'll see bats. 

Using a "bat detector" to monitor the pitch of the echolocation sound, I discovered the bats are primarily two species, Eastern Red Bat and Big Brown Bat.

 

20160822BATS01

20160822BATS02

20160822BATS03

20160822BATS04

20160822BATS05

20160822BATS06

20160822BATS07

20160822BATS08

20160822BATS09

20160822BATS10


Squirrel Standoff

It was too hot to stay too long watching the Tompkins Square Hawks.  Plus the punk bands celebrating the TSP riot, were a little too loud.  But I did get to see two fledglings and Dora.  There was a funny squirrel/hawk standoff too.  A squirrel climbed a small tree that the hawk was in, and then realized it wasn't a good idea.  Luckily, no one was hurt.


20160806RTHA01

20160806RTHA02

20160806RTHA03

20160806RTHA04

20160806RTHA05

20160806RTHA06

20160806RTHA07

20160806RTHA08

20160806RTHA09

20160806RTHA10

20160806RTHA11