1 August 2021 Update - I've added some photos made since creating this page in 2017.
Chuck Varney
These dragonflies were found within a one mile radius in Dalton, MA between 11 July and 23 August 2017.
I used Glenn Corbiere's superb Massachusetts Dragonflies and Damselflies website to identify the Male Widow skimmer, Male Twelve-spotted skimmer, and Fawn darner.
Male Widow skimmer

Found in the garage, lying (dead) atop the bumper of my wife's car on 11 July 2017.
Male Twelve-spotted skimmer

This fellow was flitting around roadside foliage on Orchard Road on 13 August 2017.

This female Twelve-spotted skimmer paid a visit to the front walkway on 28 July 2021
Fawn darner.

This was found lying on the roadside on Anthony Road on 21 August 2017.
Unidentified Darner - 23 August 2017
25 August update: Many thanks to Glenn Corbiere for identifying this as a male Lance-tipped Darner.
This dragonfly was found on the roadside along Route 9, between Cleveland and Orchard Roads. Its head is missing.
23 August 2017 - Photo #1
23 August 2017 - Photo # 2
23 August 2017 - Photo # 3
23 August 2017 - Photo #4
1 August 2021 - Like the above, this Lance-Tipped Darner (I think) was found dead at the side of the road
between Cleveland and Orchard roads. This one, though, had its head intact.

1 August 2021 - Photo #1

1 August 2021 - Photo #2

1 August 2021 - Photo #3
1 August 2021 - Photo #4
7-17 September 2017 Additions from Tewksbury, MA
My daughter photographed this visitor in her garden. It may be a male Autumn Meadowhawk.

Tewksbury 7 September 2017 #1

Tewksbury 7 September 2017 #2
Another September visitor to my daughter's garden, possibly a female Autumn Meadowhawk.

Tewksbury 17 September 2017 #1

Tewksbury 17 September 2017 #2