Birding spot · Sussex County, Delaware
Birding at Great Marsh: What You'll See Each Week In November, the birds most often reported at Great Marsh are Yellow-rumped Warbler (64%), Northern Harrier (60%), and Red-winged Blackbird (60%). It is busiest in spring, when 81 species turn up on at least 1 in 20 checklists, and species counts peak in late October (86 species). 203 species have been reported here across 2,080 complete checklists from 369 birders.
Species by week 0 20 40 60 80 100 Jan 1-7: 41 species on 5%+ of 26 checklists Jan 8-14: 55 species on 5%+ of 37 checklists Jan 15-21: 43 species on 5%+ of 25 checklists Jan 22-31: 55 species on 5%+ of 61 checklists Feb 1-7: 61 species on 5%+ of 33 checklists Feb 8-14: 58 species on 5%+ of 36 checklists Feb 15-21: 50 species on 5%+ of 32 checklists Feb 22-28: 49 species on 5%+ of 25 checklists Mar 1-7: 47 species on 5%+ of 30 checklists Mar 8-14: 58 species on 5%+ of 31 checklists Mar 15-21: 50 species on 5%+ of 26 checklists Mar 22-31: 66 species on 5%+ of 66 checklists Apr 1-7: 68 species on 5%+ of 65 checklists Apr 8-14: 75 species on 5%+ of 105 checklists Apr 15-21: 70 species on 5%+ of 162 checklists Apr 22-30: 73 species on 5%+ of 165 checklists May 1-7: 80 species on 5%+ of 95 checklists May 8-14: 74 species on 5%+ of 91 checklists May 15-21: 81 species on 5%+ of 66 checklists May 22-31: 77 species on 5%+ of 70 checklists Jun 1-7: 78 species on 5%+ of 30 checklists Jun 8-14: 75 species on 5%+ of 38 checklists Jun 15-21: 71 species on 5%+ of 43 checklists Jun 22-30: 74 species on 5%+ of 44 checklists Jul 1-7: 78 species on 5%+ of 31 checklists Jul 8-14: 74 species on 5%+ of 39 checklists Jul 15-21: 70 species on 5%+ of 30 checklists Jul 22-31: 65 species on 5%+ of 61 checklists Aug 1-7: 70 species on 5%+ of 48 checklists Aug 8-14: 64 species on 5%+ of 48 checklists Aug 15-21: 56 species on 5%+ of 41 checklists Aug 22-31: 57 species on 5%+ of 70 checklists Sep 1-7: 68 species on 5%+ of 37 checklists Sep 8-14: 65 species on 5%+ of 39 checklists Sep 15-21: 52 species on 5%+ of 22 checklists Sep 22-30: 54 species on 5%+ of 31 checklists Oct 1-7: 77 species on 5%+ of 19 checklists Oct 8-14: 60 species on 5%+ of 23 checklists Oct 15-21: 78 species on 5%+ of 16 checklists Oct 22-31: 86 species on 5%+ of 19 checklists Nov 1-7: 76 species on 5%+ of 17 checklists Nov 8-14: 58 species on 5%+ of 13 checklists Nov 15-21: low data (6 checklists) Nov 22-30: low data (9 checklists) Dec 1-7: 54 species on 5%+ of 13 checklists Dec 8-14: 51 species on 5%+ of 14 checklists Dec 15-21: 61 species on 5%+ of 12 checklists Dec 22-31: 70 species on 5%+ of 20 checklists Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 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 Yellow-rumped Warbler 64% 2 Northern Harrier 60% 3 Red-winged Blackbird 60% 4 Mourning Dove 58% 5 Song Sparrow 56% 6 Turkey Vulture 56% 7 American Robin 53% 8 Northern Cardinal 51% 9 White-throated Sparrow 51% 10 Swamp Sparrow 49% 11 Great Blue Heron 44% 12 Bald Eagle 42% 13 Canada Goose 38% 14 Carolina Wren 38% 15 Red-bellied Woodpecker 38% 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 Specialties Birds reported far more often here than across Delaware.
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 .
Yellow-rumped Warbler64%
Red-winged Blackbird60%
Mourning Dove58%
Song Sparrow56%
Turkey Vulture56%
American Robin53%
Northern Cardinal51%
White-throated Sparrow51%
Swamp Sparrow49%
Great Blue Heron44%
Bald Eagle42%
Canada Goose38%
Carolina Wren38%
Red-bellied Woodpecker38%