WhenToBird

Birding spot · Will County, Illinois

Birding at Rock Run Rookery Preserve 1: What You'll See Each Week

In November, the birds most often reported at Rock Run Rookery Preserve 1 are Double-crested Cormorant (94%), Ring-billed Gull (94%), and Canada Goose (57%). It is busiest in spring, when 63 species turn up on at least 1 in 20 checklists, and species counts peak in the second week of April (66 species). 131 species have been reported here across 902 complete checklists from 229 birders.

Species by week

020406080Jan 1-7: 50 species on 5%+ of 77 checklistsJan 8-14: 43 species on 5%+ of 37 checklistsJan 15-21: 45 species on 5%+ of 40 checklistsJan 22-31: 43 species on 5%+ of 56 checklistsFeb 1-7: 45 species on 5%+ of 38 checklistsFeb 8-14: 41 species on 5%+ of 36 checklistsFeb 15-21: 45 species on 5%+ of 43 checklistsFeb 22-28: 50 species on 5%+ of 40 checklistsMar 1-7: 45 species on 5%+ of 47 checklistsMar 8-14: 49 species on 5%+ of 54 checklistsMar 15-21: 53 species on 5%+ of 30 checklistsMar 22-31: 50 species on 5%+ of 31 checklistsApr 1-7: 65 species on 5%+ of 18 checklistsApr 8-14: 66 species on 5%+ of 17 checklistsApr 15-21: low data (9 checklists)Apr 22-30: 46 species on 5%+ of 10 checklistsMay 1-7: low data (4 checklists)May 8-14: low data (6 checklists)May 15-21: 58 species on 5%+ of 11 checklistsMay 22-31: low data (3 checklists)Jun 1-7: low data (5 checklists)Jun 8-14: low data (4 checklists)Jun 15-21: low data (2 checklists)Jun 22-30: low data (6 checklists)Jul 1-7: low data (9 checklists)Jul 8-14: low data (1 checklists)Jul 15-21: low data (5 checklists)Jul 22-31: low data (5 checklists)Aug 1-7: low data (3 checklists)Aug 8-14: low data (9 checklists)Aug 15-21: 50 species on 5%+ of 13 checklistsAug 22-31: low data (6 checklists)Sep 1-7: low data (2 checklists)Sep 8-14: low data (1 checklists)Sep 15-21: low data (4 checklists)Sep 22-30: low data (5 checklists)Oct 1-7: low data (6 checklists)Oct 8-14: low data (3 checklists)Oct 15-21: 43 species on 5%+ of 11 checklistsOct 22-31: 45 species on 5%+ of 11 checklistsNov 1-7: 41 species on 5%+ of 15 checklistsNov 8-14: 45 species on 5%+ of 20 checklistsNov 15-21: 43 species on 5%+ of 17 checklistsNov 22-30: 46 species on 5%+ of 15 checklistsDec 1-7: 44 species on 5%+ of 17 checklistsDec 8-14: 46 species on 5%+ of 28 checklistsDec 15-21: 49 species on 5%+ of 24 checklistsDec 22-31: 51 species on 5%+ of 48 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. 1Double-crested Cormorant94%
  2. 2Ring-billed Gull94%
  3. 3Canada Goose57%
  4. 4Dark-eyed Junco55%
  5. 5Great Blue Heron54%
  6. 6Hooded Merganser54%
  7. 7American White Pelican43%
  8. 8American Herring Gull40%
  9. 9American Robin40%
  10. 10Northern Cardinal36%
  11. 11American Goldfinch31%
  12. 12American Tree Sparrow31%
  13. 13Mallard31%
  14. 14Pied-billed Grebe30%
  15. 15Belted Kingfisher28%

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 45 species

  1. Ring-billed Gull89%
  2. Canada Goose89%
  3. Common Merganser88%
  4. Great Blue Heron81%
  5. Common Goldeneye78%

Spring 63 species

  1. Great Blue Heron90%
  2. Canada Goose89%
  3. Double-crested Cormorant80%
  4. Ring-billed Gull70%
  5. Northern Cardinal67%

Summer 54 species

  1. Great Egret94%
  2. Double-crested Cormorant93%
  3. Great Blue Heron78%
  4. Northern Cardinal76%
  5. American Goldfinch65%

Fall 44 species

  1. Double-crested Cormorant95%
  2. Ring-billed Gull92%
  3. Canada Goose55%
  4. Great Blue Heron52%
  5. American White Pelican51%

Specialties

Birds reported far more often here than across Illinois.

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.