2026-05-22 Horn Pond Mountain, Woburn and Breakneck Hill, Southborough

[Peter Loshin]

I went to HPM this morning. Conditions were sunny and cool (about 60 degrees) and little to no wind. I saw:

15 Duskywing (some Wild Indigo but mostly Juvenal's)

1 Dusted Skipper

1 Black Swallowtail

2 Eastern Tailed-blue

2 Cabbage White

Five species and 21 individuals.

I went on to Breakneck Hill Conservation Area in Southborough, from about 1:00 to 3:00. Conditions were a bit warmer (mid-60s), with the sky becoming overcast by the time I left. Little to no wind. I saw:

1 Northern Cloudywing

100+ Little Wood-nymph

24 Silvery Blue

10 Common Ringlet

10 Clouded Sulphur

3 Cabbage White

1 Tiger Swallowtail (sp)

1 Black Swallowtail (sp)

1 Monarch

1 Eastern Tailed-blue

2 Pearl Crescent

1 American Copper

2 Baltimore Checkerspot caterpillars

A total of 13 species. I stopped counting Wood-nymphs after seeing 30-40 in my first 20 minutes on-site. In addition to them, there were 56 individuals of the other 12 species.

The Northern Cloudywing showed just long enough to be photographed, but some of the Silvery Blues posed nicely. Photos below.

Peter Loshin