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.


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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.

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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!

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