Birding spot · Montgomery County, Pennsylvania
Birding at Green Lane Reservoir (Pennsburg): What You'll See Each Week In November, the birds most often reported at Green Lane Reservoir (Pennsburg) are Canada Goose (92%), Ruddy Duck (77%), and Mallard (67%). It is busiest in spring, when 79 species turn up on at least 1 in 20 checklists, and species counts peak in mid October (80 species). 206 species have been reported here across 3,842 complete checklists from 453 birders.
Species by week 0 20 40 60 80 Jan 1-7: 55 species on 5%+ of 96 checklists Jan 8-14: 54 species on 5%+ of 84 checklists Jan 15-21: 51 species on 5%+ of 92 checklists Jan 22-31: 50 species on 5%+ of 124 checklists Feb 1-7: 51 species on 5%+ of 89 checklists Feb 8-14: 56 species on 5%+ of 115 checklists Feb 15-21: 53 species on 5%+ of 86 checklists Feb 22-28: 54 species on 5%+ of 101 checklists Mar 1-7: 57 species on 5%+ of 92 checklists Mar 8-14: 59 species on 5%+ of 89 checklists Mar 15-21: 67 species on 5%+ of 71 checklists Mar 22-31: 65 species on 5%+ of 99 checklists Apr 1-7: 63 species on 5%+ of 88 checklists Apr 8-14: 66 species on 5%+ of 86 checklists Apr 15-21: 63 species on 5%+ of 61 checklists Apr 22-30: 66 species on 5%+ of 116 checklists May 1-7: 64 species on 5%+ of 62 checklists May 8-14: 71 species on 5%+ of 50 checklists May 15-21: 70 species on 5%+ of 50 checklists May 22-31: 61 species on 5%+ of 71 checklists Jun 1-7: 59 species on 5%+ of 26 checklists Jun 8-14: 61 species on 5%+ of 15 checklists Jun 15-21: 52 species on 5%+ of 23 checklists Jun 22-30: 54 species on 5%+ of 28 checklists Jul 1-7: 65 species on 5%+ of 14 checklists Jul 8-14: 67 species on 5%+ of 35 checklists Jul 15-21: 71 species on 5%+ of 34 checklists Jul 22-31: 63 species on 5%+ of 46 checklists Aug 1-7: 61 species on 5%+ of 31 checklists Aug 8-14: 69 species on 5%+ of 52 checklists Aug 15-21: 59 species on 5%+ of 104 checklists Aug 22-31: 56 species on 5%+ of 144 checklists Sep 1-7: 62 species on 5%+ of 85 checklists Sep 8-14: 73 species on 5%+ of 68 checklists Sep 15-21: 67 species on 5%+ of 82 checklists Sep 22-30: 74 species on 5%+ of 110 checklists Oct 1-7: 74 species on 5%+ of 78 checklists Oct 8-14: 65 species on 5%+ of 81 checklists Oct 15-21: 80 species on 5%+ of 86 checklists Oct 22-31: 67 species on 5%+ of 177 checklists Nov 1-7: 71 species on 5%+ of 91 checklists Nov 8-14: 66 species on 5%+ of 136 checklists Nov 15-21: 60 species on 5%+ of 112 checklists Nov 22-30: 58 species on 5%+ of 162 checklists Dec 1-7: 64 species on 5%+ of 75 checklists Dec 8-14: 57 species on 5%+ of 69 checklists Dec 15-21: 53 species on 5%+ of 62 checklists Dec 22-31: 58 species on 5%+ of 94 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 Canada Goose 92% 2 Ruddy Duck 77% 3 Mallard 67% 4 Common Merganser 65% 5 Blue Jay 65% 6 Great Blue Heron 60% 7 American Crow 55% 8 Ring-billed Gull 55% 9 Double-crested Cormorant 54% 10 American Robin 51% 11 Bufflehead 47% 12 Dark-eyed Junco 46% 13 Eastern Bluebird 45% 14 Northern Cardinal 45% 15 Northern Shoveler 45% 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 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 .
Canada Goose92%
Ruddy Duck77%
Mallard67%
Common Merganser65%
Blue Jay65%
Great Blue Heron60%
American Crow55%
Ring-billed Gull55%
Double-crested Cormorant54%
American Robin51%
Bufflehead47%
Dark-eyed Junco46%
Eastern Bluebird45%
Northern Cardinal45%
Northern Shoveler45%