23 September 2019 – House Wren and Ruby-throated Hummingbird

This morning there was a House Wren at the main north entrance and a Ruby-throated Hummingbird in the southwestern alcove.

August 2009–July 2019: Ten Year Milestone

Ahead of the official official ten-year anniversary of window collision monitoring at the Noble Research Center on August 20th, here’s a recap of my very first post from 7 September, 2009.

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Those were heady days, indeed.

Here are some basic things I’ve observed and learned, August 2009–July 2019.

With some occasional help when I’ve been out of town, we surveyed the perimeter of the Noble Research Center for window-collided birds 2,141 times. I’ve generally run surveys every day (usually within about two hours of sunrise) during heavy migration periods in  autumn and spring, scaling back to more like weekly surveys during the dead of winter.

Including 4 unidentified passerine remains, at least 414 individuals of 67 species died in window collisions at the Noble Research Center.

The most frequently encountered casualties were:

  1. Lincoln’s Sparrow 51
  2. Ruby-throated Hummingbird 36
  3. Painted Bunting 26
  4. Indigo Bunting 23
  5. Grasshopper Sparrow 20
  6. Clay-colored Sparrow 18
  7. Mourning Dove 17
  8. Nashville Warbler 16
  9. Mourning Warbler 15

Tenth is a four-way tie with 11 casualties each for Common Yellowthroat, Orange-crowned Warbler, Song Sparrow, and Yellow Warbler.

The spatial distribution of those casualties looks a bit like this:

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Collision casualties at the Noble Research Center, Stillwater, OK, 2017

Window treatments applied to selected panes in 2016 have, evidently, not contributed to a decline in collisions.

I plan to continue my monitoring at the NRC for as long as I can, and in the next 10 years hope to appreciably reduce the mortality here.

 

19 July 2019 – Two Ruby-throated Hummingbirds

I was out of town this week and grateful to Nikolai Starzak and Sam Cady who alerted me to what look to be a couple more unfortunate victims of early fall migration. Both were found at the southwestern alcove.

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8 July 2019 – Louisiana Waterthrush

Although I consider July to be spring/summer, today’s casualty screams fall migrant. I was saddened this morning to find the pinnacle of avian evolution, Louisiana Waterthrush, at the far northwestern corner of the Noble Research Center.

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This bird looked pretty good on the outside, but it was pretty rank. It’s Monday and the bird came in at some point between Friday afternoon and this morning. The relatively bob-tail has me thinking that it might be a HY bird, but I’m not sure.