WhenToBird

Birding spot · Chester County, Pennsylvania

Birding at Coatesville Reservoir: What You'll See Each Week

In November, the birds most often reported at Coatesville Reservoir are Canada Goose (98%), American Black Duck (58%), and Mallard (54%). It is busiest in summer, when 64 species turn up on at least 1 in 20 checklists, and species counts peak in the second week of October (67 species). 142 species have been reported here across 1,117 complete checklists from 177 birders.

Species by week

020406080Jan 1-7: 46 species on 5%+ of 97 checklistsJan 8-14: 39 species on 5%+ of 48 checklistsJan 15-21: 29 species on 5%+ of 42 checklistsJan 22-31: 42 species on 5%+ of 59 checklistsFeb 1-7: 35 species on 5%+ of 27 checklistsFeb 8-14: 43 species on 5%+ of 37 checklistsFeb 15-21: 48 species on 5%+ of 40 checklistsFeb 22-28: 48 species on 5%+ of 37 checklistsMar 1-7: 44 species on 5%+ of 33 checklistsMar 8-14: 48 species on 5%+ of 20 checklistsMar 15-21: 47 species on 5%+ of 29 checklistsMar 22-31: 50 species on 5%+ of 32 checklistsApr 1-7: low data (8 checklists)Apr 8-14: low data (6 checklists)Apr 15-21: 53 species on 5%+ of 11 checklistsApr 22-30: low data (6 checklists)May 1-7: low data (9 checklists)May 8-14: low data (4 checklists)May 15-21: low data (2 checklists)May 22-31: low data (8 checklists)Jun 1-7: 57 species on 5%+ of 15 checklistsJun 8-14: low data (8 checklists)Jun 15-21: low data (5 checklists)Jun 22-30: low data (4 checklists)Jul 1-7: low data (2 checklists)Jul 8-14: low data (5 checklists)Jul 15-21: low data (6 checklists)Jul 22-31: low data (8 checklists)Aug 1-7: low data (2 checklists)Aug 8-14: low data (6 checklists)Aug 15-21: low data (8 checklists)Aug 22-31: low data (8 checklists)Sep 1-7: low data (3 checklists)Sep 8-14: low data (2 checklists)Sep 15-21: low data (5 checklists)Sep 22-30: 54 species on 5%+ of 10 checklistsOct 1-7: low data (6 checklists)Oct 8-14: 67 species on 5%+ of 17 checklistsOct 15-21: 49 species on 5%+ of 12 checklistsOct 22-31: 53 species on 5%+ of 37 checklistsNov 1-7: 55 species on 5%+ of 33 checklistsNov 8-14: 52 species on 5%+ of 26 checklistsNov 15-21: 54 species on 5%+ of 43 checklistsNov 22-30: 51 species on 5%+ of 45 checklistsDec 1-7: 52 species on 5%+ of 48 checklistsDec 8-14: 50 species on 5%+ of 57 checklistsDec 15-21: 47 species on 5%+ of 25 checklistsDec 22-31: 51 species on 5%+ of 116 checklistsJanFebMarAprMayJunJulAugSepOctNovDec
Number of species reported on at least 5% of complete checklists, by week (4 per month). Grey bars: fewer than 10 checklists, not counted.

In November: what to expect

  1. 1Canada Goose98%
  2. 2American Black Duck58%
  3. 3Mallard54%
  4. 4Pied-billed Grebe52%
  5. 5Red-bellied Woodpecker49%
  6. 6White-throated Sparrow44%
  7. 7Carolina Wren41%
  8. 8Song Sparrow41%
  9. 9White-breasted Nuthatch41%
  10. 10Carolina Chickadee40%
  11. 11Blue Jay39%
  12. 12Downy Woodpecker39%
  13. 13Ruddy Duck39%
  14. 14Dark-eyed Junco38%
  15. 15American Crow36%

Share of complete checklists at this spot that reported the bird in November. The sparkline is the whole year, with this month highlighted.

Season by season

Winter 48 species

  1. Canada Goose94%
  2. Common Merganser76%
  3. American Black Duck68%
  4. Mallard57%
  5. Red-bellied Woodpecker35%

Spring 57 species

  1. Canada Goose76%
  2. Common Merganser64%
  3. Song Sparrow45%
  4. Mallard45%
  5. American Robin43%

Summer 64 species

  1. Gray Catbird82%
  2. Mourning Dove74%
  3. Song Sparrow74%
  4. American Robin71%
  5. American Goldfinch60%

Fall 58 species

  1. Canada Goose92%
  2. Red-bellied Woodpecker54%
  3. American Black Duck50%
  4. Mallard49%
  5. Blue Jay47%

Specialties

Birds reported far more often here than across Pennsylvania.

Nearby spots

Frequency is the share of complete checklists at this location that listed the bird, 2016–2025. Busy places report more of everything, and the weekly chart counts species on at least 5% of checklists so a few stray reports do not inflate it. How to read it.