Birding spot · Sussex County, Delaware
Birding at Thirty-five Acre Pond: What You'll See Each Week In November, the birds most often reported at Thirty-five Acre Pond are American Black Duck (85%), Great Blue Heron (85%), and Mute Swan (81%). It is busiest in spring, when 88 species turn up on at least 1 in 20 checklists, and species counts peak in the second week of October (94 species). 184 species have been reported here across 808 complete checklists from 319 birders.
Species by week 0 20 40 60 80 100 Jan 1-7: 67 species on 5%+ of 17 checklists Jan 8-14: low data (7 checklists) Jan 15-21: 64 species on 5%+ of 23 checklists Jan 22-31: 77 species on 5%+ of 20 checklists Feb 1-7: 65 species on 5%+ of 33 checklists Feb 8-14: 78 species on 5%+ of 17 checklists Feb 15-21: 56 species on 5%+ of 21 checklists Feb 22-28: 78 species on 5%+ of 20 checklists Mar 1-7: 58 species on 5%+ of 28 checklists Mar 8-14: 75 species on 5%+ of 14 checklists Mar 15-21: 85 species on 5%+ of 16 checklists Mar 22-31: 83 species on 5%+ of 16 checklists Apr 1-7: 81 species on 5%+ of 12 checklists Apr 8-14: 77 species on 5%+ of 13 checklists Apr 15-21: low data (8 checklists) Apr 22-30: 89 species on 5%+ of 20 checklists May 1-7: 79 species on 5%+ of 17 checklists May 8-14: 93 species on 5%+ of 14 checklists May 15-21: low data (9 checklists) May 22-31: 67 species on 5%+ of 22 checklists Jun 1-7: 82 species on 5%+ of 14 checklists Jun 8-14: 87 species on 5%+ of 17 checklists Jun 15-21: 62 species on 5%+ of 21 checklists Jun 22-30: 74 species on 5%+ of 11 checklists Jul 1-7: 67 species on 5%+ of 22 checklists Jul 8-14: 70 species on 5%+ of 11 checklists Jul 15-21: 75 species on 5%+ of 13 checklists Jul 22-31: 79 species on 5%+ of 26 checklists Aug 1-7: 84 species on 5%+ of 17 checklists Aug 8-14: 82 species on 5%+ of 14 checklists Aug 15-21: low data (9 checklists) Aug 22-31: 75 species on 5%+ of 15 checklists Sep 1-7: 87 species on 5%+ of 16 checklists Sep 8-14: 81 species on 5%+ of 20 checklists Sep 15-21: 73 species on 5%+ of 15 checklists Sep 22-30: 69 species on 5%+ of 22 checklists Oct 1-7: 64 species on 5%+ of 22 checklists Oct 8-14: 94 species on 5%+ of 17 checklists Oct 15-21: 76 species on 5%+ of 12 checklists Oct 22-31: 78 species on 5%+ of 17 checklists Nov 1-7: 70 species on 5%+ of 16 checklists Nov 8-14: 84 species on 5%+ of 14 checklists Nov 15-21: 84 species on 5%+ of 19 checklists Nov 22-30: 68 species on 5%+ of 23 checklists Dec 1-7: 68 species on 5%+ of 15 checklists Dec 8-14: 73 species on 5%+ of 13 checklists Dec 15-21: low data (6 checklists) Dec 22-31: 66 species on 5%+ of 24 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 American Black Duck 85% 2 Great Blue Heron 85% 3 Mute Swan 81% 4 Carolina Chickadee 76% 5 Song Sparrow 76% 6 American Wigeon 75% 7 Gadwall 72% 8 Mallard 71% 9 Belted Kingfisher 65% 10 Turkey Vulture 64% 11 Bald Eagle 58% 12 Carolina Wren 57% 13 Pied-billed Grebe 57% 14 Red-bellied Woodpecker 57% 15 Swamp Sparrow 57% 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 .
American Black Duck85%
Great Blue Heron85%
Mute Swan81%
Carolina Chickadee76%
Song Sparrow76%
American Wigeon75%
Gadwall72%
Mallard71%
Belted Kingfisher65%
Turkey Vulture64%
Bald Eagle58%
Carolina Wren57%
Pied-billed Grebe57%
Red-bellied Woodpecker57%
Swamp Sparrow57%