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Sunday, January 21, 2018

Delaware County eBird numbers in review for 2017

***eBird Web Site ( for all kinds of data characterizations and how to join in if you care to do so. Except for the value of time and effort involved, it is all available free of monetary charge; allowing access to: review of data submitted from all over the world, rare bird alerts, feature articles, personal lists from life lists to specific area lists, and a venue for contributing to a data-base of world-wide submissions in a "Think Globally, Act Locally" manner.

***Species reported for each month for 2011 through 2017; year total for 2011 through 2017; and All Time totals for each month and year for all years combined back to earliest entry from 1900:
2011:      J-077, F-071, M-083, A-134, M-140, J-100, J-078, A-119, S-098, O-128, N-089, D-092, Y-211
2012:      J-081, F-080, M-084, A-134, M-135, J-098, J-084, A-102, S-124,
O-146, N-084, D-086, Y-216
2013:      J-084, F-079, M-098, A-130, M-147, J-087,
J-102, A-109, S-129, O-113, N-087, D-098, Y-214
J-093, F-089, M-100, A-135, M-155, J-098, J-099, A-112, S-123, O-130, N-097, D-097, Y-220
2015:      J-081, F-081
, M-104, A-150, M-152, J-112, J-082, A-120, S-129, O-124, N-098, D-089, Y-223
2016:      J-087, F-087, M-104, A-133, M-153, J-101, J-095, A-102, S-134, O-118, N-090, D-088, Y-213
2017:      J-093, F-087. M-115, A-153, M-152, J-097, J-105, A-131, S-156, O-124, N-099, D-097, Y-231

All Time: J-150, F-142, M-156, A-222, M-237, J-157, J-158, A-195, S-236, O-229, N-186, D-174, Y-328

***Discussion via Bullet Points:
  • 328 species have been reported to eBird all time for Delaware County. One new species was added to the Delaware County eBird list since 2013’s American Avocet. That was the Black-headed Gull found at the Delco portion of John Heinz NWR.
  • 231 species were listed on eBird for Delaware County in 2017, 18 more than in 2016. This was due in large part to two birders who were very active in the county in 2017.
  • A new total species high count was set for 6 months out of twelve: March, April, July, August, Sept and Nov 2017.
  • 100+ species have now been reported in eight out of twelve calendar months at least once, leaving only the winter months November thru February outstanding. November came oh so close with 99 species recorded.
  • 150+ species is a tough number to reach in any month. Previously, only two months have achieved that lofty number: April & May. In 2017, September has now been added to that category.
  • 42 species have been reported for Delaware County for every one of the eBird bar chart weeks in a year.
  • Here is a list of the top 15 of 50 Delaware County eBird hotspots based on species diversity reported to date:
1.  John Heinz NWR-wetlands (Delaware Co) – 270 (three new birds added this year)
2.  Delaware River-Ft Mifflin/Hog Island Rds-207 (six new birds added this year)
3.  Ridley Creek SP (IBA) – 203 (one new bird added this year)
4. Tyler Arboretum – 185
5. Springton Reservoir (Restricted Access) – 182
6. Ridley Creek SP--Bridle Trail – 178
7. Darlington Tract – 172
8. Crum Woods – 162 (two new birds added this year)
9. The Willows – 156 (eleven new birds added this year)
10. Big Bend Farms (restricted Access) – 147 (one new bird added this year)
11. Haverford College (Delaware Co)- 147 (ten new birds added this year)
12. Rose Tree Park – 140
13. Hildacy Farm - 137 (seven new birds added this year)
14. Crum Creek Reservoir –133 (one new bird added this year)
15. Philadelphia International Airport – 133 (new to top 15 this year)
  • To view the list of the Top 100 eBirders for Delaware County in 2017, go to:
The top 100 birders in Delaware County submitted 231 species and submitted 9032 (an increase of  370%) separate checklists. Way to go!!! And I know there a several good birders whose lists aren't counted. Maybe they will add their sightings next year. (Hint, Hint)
Delaware County data sets for bar chart and other eBird status & distribution characterizations were greatly increased in 2017 by the record participation of birders by/for whom data was entered. Thanks to all of you!

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