WhenToBird

Birding spot · Middlesex County, Massachusetts

Birding at Mystic River Reservation (Mystic River Marsh (historical)): What You'll See Each Week

In November, the birds most often reported at Mystic River Reservation (Mystic River Marsh (historical)) are Mallard (93%), American Herring Gull (91%), and Ring-billed Gull (89%). It is busiest in spring, when 47 species turn up on at least 1 in 20 checklists, and species counts peak in early May (47 species). 98 species have been reported here across 865 complete checklists from 258 birders.

Species by week

01020304050Jan 1-7: 40 species on 5%+ of 76 checklistsJan 8-14: 33 species on 5%+ of 34 checklistsJan 15-21: 30 species on 5%+ of 33 checklistsJan 22-31: 36 species on 5%+ of 33 checklistsFeb 1-7: 38 species on 5%+ of 39 checklistsFeb 8-14: 35 species on 5%+ of 29 checklistsFeb 15-21: 40 species on 5%+ of 40 checklistsFeb 22-28: 40 species on 5%+ of 35 checklistsMar 1-7: 41 species on 5%+ of 11 checklistsMar 8-14: 39 species on 5%+ of 16 checklistsMar 15-21: 36 species on 5%+ of 16 checklistsMar 22-31: 34 species on 5%+ of 13 checklistsApr 1-7: low data (5 checklists)Apr 8-14: 45 species on 5%+ of 10 checklistsApr 15-21: 44 species on 5%+ of 11 checklistsApr 22-30: 43 species on 5%+ of 10 checklistsMay 1-7: 47 species on 5%+ of 16 checklistsMay 8-14: 40 species on 5%+ of 16 checklistsMay 15-21: low data (7 checklists)May 22-31: low data (9 checklists)Jun 1-7: low data (6 checklists)Jun 8-14: low data (7 checklists)Jun 15-21: low data (5 checklists)Jun 22-30: low data (9 checklists)Jul 1-7: low data (6 checklists)Jul 8-14: low data (5 checklists)Jul 15-21: low data (4 checklists)Jul 22-31: low data (9 checklists)Aug 1-7: low data (9 checklists)Aug 8-14: low data (7 checklists)Aug 15-21: 37 species on 5%+ of 14 checklistsAug 22-31: low data (9 checklists)Sep 1-7: low data (4 checklists)Sep 8-14: low data (6 checklists)Sep 15-21: low data (5 checklists)Sep 22-30: low data (4 checklists)Oct 1-7: low data (4 checklists)Oct 8-14: low data (3 checklists)Oct 15-21: low data (6 checklists)Oct 22-31: 41 species on 5%+ of 15 checklistsNov 1-7: low data (7 checklists)Nov 8-14: 32 species on 5%+ of 14 checklistsNov 15-21: 38 species on 5%+ of 14 checklistsNov 22-30: 34 species on 5%+ of 41 checklistsDec 1-7: 36 species on 5%+ of 69 checklistsDec 8-14: 34 species on 5%+ of 45 checklistsDec 15-21: 37 species on 5%+ of 32 checklistsDec 22-31: 41 species on 5%+ of 47 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. 1Mallard93%
  2. 2American Herring Gull91%
  3. 3Ring-billed Gull89%
  4. 4Canada Goose88%
  5. 5Mute Swan80%
  6. 6Great Black-backed Gull78%
  7. 7Double-crested Cormorant75%
  8. 8Bufflehead70%
  9. 9House Sparrow62%
  10. 10Rock Pigeon51%
  11. 11American Goldfinch43%
  12. 12White-throated Sparrow38%
  13. 13Northern Mockingbird36%
  14. 14Song Sparrow36%
  15. 15Redhead30%

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 38 species

  1. Mallard97%
  2. Canada Goose91%
  3. Ring-billed Gull89%
  4. American Herring Gull87%
  5. Bufflehead79%

Spring 47 species

  1. Mallard94%
  2. Canada Goose94%
  3. Red-winged Blackbird78%
  4. American Herring Gull75%
  5. Common Grackle74%

Summer 37 species

  1. Mallard92%
  2. Canada Goose88%
  3. Mute Swan84%
  4. American Herring Gull83%
  5. House Sparrow74%

Fall 42 species

  1. Mallard96%
  2. American Herring Gull89%
  3. Canada Goose86%
  4. Ring-billed Gull86%
  5. Mute Swan84%

Specialties

Birds reported far more often here than across Massachusetts.

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.