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PSF Update 7 Dear PSF Volunteers and friends, This week marks the end of the study that was launched eight weeks ago and I want to thank all the volunteers who participated in this research. Rain or shine, Rosh Hashanah or Halloween, nothing stopped them from doing their route every single day at five different locations across Manhattan. Thanks to their effort, we were able to gather a large amount of data, which surpassed all previous seasons. Thank you Volunteers!! Our total numbers for this season are now 608 birds, with 101 injuries. This is the first time we’ve ever reached this high a number and it’s only early November! This past week, total collisions were above one hundred, with 87 fatalities and 21 injuries. The most common species found this week was the Ruby-crowned Kinglet (24), followed closely by the White-throated Sparrow (23) and the Dark-eyed Junco (16). The following graph indicates the number of birds found at our most problematic locations, with Morgan Mail still in the lead. The Jacob Javits Center has over 100 collisions so far this season, which reflects the increased monitoring effort at that site.
It’s interesting to note that the top casualty at each of these sites is not always the same. Morgan Mail and the Javits both have the Ruby-crowned Kinglet as the number one bird colliding with their structure. For Morgan Mail, this species represent 16% of its total birds this season and for Javits, this percentage jumps to 23%.
Photo Cal Vornberger The World Financial Center only witnessed a few Ruby-crowned Kinglet collisions in comparison with its number one species which is the White-throated Sparrow. This species represents 20% of all its collisions this season.
Photo Steve Nanz The MET Museum holds a warbler as its number one species: the Common Yellowthroat, which represents 17% of all collisions this season.
Photo Cal Vornberger Finally, as the season is unwinding, here is a graph of collision intensity, where both peaks are clearly visible, even at specific locations.
Thank you all again and you’ll hear from me next week. Nicole |
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