Butterflies of Berks County, Pennsylvania ---- Sightings in 2011
Photos of Berks Butterflies from 2011    (2010 photos)

Butterfly walks in Berks County - 2011

Return to Berks County Nature     Go to Lancaster Butterfly Sightings

    The butterfly species with dates have been seen in Berks County, Pennsylvania in 2011. There are records of 108 species for Berks County. The list below includes all those reported from 2003 through 2011, a total of 91. No new species were added this year. Four species were added in 2010. 

     Starting this year we are recording the first sighting for each month in order to have data over the season. And we have added a last date for the year. If you have a later report than the "Last" date posted, please send it to the email below. 

     The following observers contributed to this 2011 report: Karl Gardner, Kerry Grim, Rudy Keller, Harold Lebo, Ken Lebo, Paul Michaly, Robert Noll, Carol Polarine, Anthony Schoch, Joan Silagy, Jan Slater, Mike Slater, Ryan Woolwine, and those on the April Neversink Mountain butterfly walk.

     If you have a reliable sighting not yet on this list for 2011, please send an email to. If you are not sure and have a photograph, send it. We appreciate your help. 

Sightings in 2011 (72) (Species seen in December - 1) --- Updated 1/1/12
     (Latest seen in 2011 - Orange Suphur, December 31 - multiple sightings)

                                       The day of the first sighting is listed for each month plus the last date for the year.

Family HESPERIIDAE Mar Apr May Jun Jul Aug Sep Oct Last
1 Silver-spotted Skipper 8 1 1 1 1
2 Long-tailed Skipper
3 Hoary-edged Skipper 17 2
4 Northern Cloudywing 6
5 Dreamy Duskywing 30
6 Sleepy Duskywing 25
7 Juvenal's Duskywing  30 2
8 Horace's Duskywing  30 6 10 5
9 Wild Indigo Duskywing 28 24 3 11 1
10 Checkered Skipper  14 26 8 Oct 18
11 Common Sootywing 14 7
12 Swarthy Skipper
13 Least Skipper  28 29 6 3
14 European Skipper  3
15 Fiery Skipper  20 8 Oct 18
16 Leonard's Skipper 
17 Cobweb Skipper 
18 Indian Skipper 
19 Peck's Skipper  20 1 4 1 2
20 Tawny-edged Skipper 29 11 17 2 1
21 Crossline Skipper 
22 Long Dash 
23 Northern Broken Dash  24 4
24 Little Glassywing 16 1 3
25 Sachem 12 23 1 8 Oct 9
26 Delaware Skipper  5
27 Mulberry Wing  3
28 Hobomok Skipper  24 5 24
29 Zabulon Skipper  20 1 3 1
30 Broad-winged Skipper  4 2
31 Black Dash 
32 Dun Skipper  30 14 2 6 3
33 Dusted Skipper 
34 Ocola Skipper  20
Family PAPILIONIDAE Mar Apr May Jun Jul Aug Sep Oct Last
35 Pipevine Swallowtail  27 2
36 Zebra Swallowtail  8 9 16 Jul16
37 Black Swallowtail  28 6 4 9 1
38 Giant Swallowtail  6 1 Sep27
39 Tiger Swallowtail  27 1 1 1 1 1
40 Spicebush Swallowtail  2 2 1 1 1 5 Oct 11
41 Palamedes Swallowtail
Family PIERIDAE 
42 Cabbage Butterfly = Cabbage White  6 1 1 1 1 1 4 Nov24
43 Clouded Sulphur  6 24 1 1 5 Nov 4
44 Orange Sulphur 20 2 17 1 2 6 Dec 31
45 Cloudless Sulphur 30 1
46 Little Sulphur 
47 Sleepy Orange  29 1 1 18 Nov 3
Family LYCAENIDAE
48 Harvester  30
49 American Copper  15 11 6
50 Coral Hairstreak 
51 Edward's Hairstreak  24 15
52 Banded Hairstreak  15 17 1
53 Striped Hairstreak 18 1
54 Red-banded Hairstreak 26 23 1 1
55 Juniper Hairstreak  9
56 Brown Elfin  30 6
57 Pine Elfin 
58 White-m Hairstreak  10 23
59 Gray Hairstreak  30 12 17 1 1 3
60 Eastern Tailed Blue 30 6 2 1 2 8
61 Spring Azure  14 2
62 Northern Spring Azure 
63 Summer Azure  24 1 1 1 1 8 Oct 8
64 Appalachian Azure
Family NYMPHALIDAE
 Subfamily LIBYTHEINAE 
Mar Apr May Jun Jul Aug Sep Oct Last
65 Snout Butterfly  30 2 1
Subfamily HELICONIINAE
66 Variegated Fritillary 30 24 8 2 2 5 Oct 8
67 Great Spangled Fritillary 31 3 1 1 1
68  Aphrodite 
69  Meadow Fritillary  26 24 14 6
Subfamily NYMPHALINAE
70 Pearl Crescent 12 2 6 3 6 Oct 25
71 Baltimore 
72 Question Mark 30 24 13 2 16 Oct 16
73 Comma  3 2 18 Nov 3
74 Gray Comma 18
75 Compton's Tortoiseshell 
76 Mourning Cloak  18 30 1 5
77 Milbert's Tortoiseshell 
78 American Painted Lady  20 6 2 2 17
79 Painted Lady  14
80 Red Admiral  30 2 19 4 11 3
81 Buckeye  6 19 11 2 1 5 Nov19
82 Red-spotted Purple  23 2 7 18 1
83 Viceroy 16 26
Subfamily APATURINAE
84 Hackberry Butterfly 28 2 1 6
85 Tawny Emperor  1 1
Subfamily SATYRINAE
86 Northern Pearly Eye  21
87 Appalachian (Eyed) Brown  2 2
88 Little Wood Satyr  25 1 1 Jul 14
89 Common Ringlet - 3rd known Berks sighting 16 Jul 16
90 Common Wood Nymph  15
Subfamily DANAINAE
91 Monarch 26 21 9 1 1 1 1 Nov 2
Monthly Totals 2 22 38  37 51 43 26 17 --
Past year butterfly species sightings in Berks County, PA
2003 (63)
2004 (63)
2005 (62)
2006 (61)
2007 (64)
2008 (67)
2009 (73)
2010 (80)
2011 (72)
2012 (78)
2013 (74)
No data
2015 (71)
2016 (61)
2017 (62)
(--)
.
For Lancaster County, PA butterfly sightings go to Lancaster Butterfly Sightings - 2011.

A site with data on butterfly distributions by county (and photographs) for North America can be found at Butterflies and Moths of NA.   (http://www.butterfliesandmoths.org/)

There is a small informal group of local butterfly collectors/observers in Berks Co., Pennsylvania If you are interested in butterflies and would like to meet this group, contact.

Return to Berks County Nature home page.