A year at a glance in Sandusky County
When each species’ records usually fall in Sandusky County, 2016 to 2025: the bar runs from the early to the late week, and the line marks the middle week. It shows when people recorded each species, not when it is there.
| Species | Usual weeks |
|---|---|
| Dragonflies and damselflies | |
| Common Whitetail | early June to mid-August, middle week Jul 5–11 |
| Double-striped Bluet | late May to mid-August, middle week Jul 5–11 |
| Blue Dasher | mid-June to late August, middle week Jul 12–18 |
| Calico Pennant | early June to early September, middle week Jul 19–25 |
| Variable Dancer | late June to late August, middle week Jul 19–25 |
| Blue-ringed Dancer | early July to late August, middle week Jul 26 – Aug 1 |
| Widow Skimmer | early July to early September, middle week Jul 26 – Aug 1 |
| Dusky Dancer | early July to early September, middle week Aug 16–22 |
| Swift Setwing | mid-July to mid-September, middle week Aug 16–22 |
| Eastern Amberwing | No season: most records are from one year |
| Eastern Forktail | No season: recorded in two separate seasons |
| Eastern Pondhawk | No season: the weeks are still too uncertain |
| Familiar Bluet | No season: recorded in two separate seasons |
| Flowering plants | |
| creeping thistle | mid-May to late August, middle week Jul 5–11 |