A year at a glance in Delaware County
When each species’ records usually fall in Delaware 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.
284 species
| Species | Usual weeks |
|---|---|
| Amphibians | |
| Eastern Red-backed Salamander | mid-September to mid-May, middle week Apr 12–18 |
| American Toad | No season: recorded in two separate seasons |
| Gray Treefrog | No season: recorded in two separate seasons |
| Green frog | No season: the weeks are still too uncertain |
| Spotted Salamander | No season: most records are from one year |
| Spring Peeper | No season: the weeks are still too uncertain |
| Bees, wasps and ants | |
| Two-spotted Longhorn Bee | mid-July to mid-August, middle week Jul 26 – Aug 1 |
| Eastern Carpenter Bee | mid-April to late September, middle week Aug 16–22 |
| Bald-faced Hornet | No season: the weeks are still too uncertain |
| Brown-belted Bumble Bee | No season: the weeks are still too uncertain |
| Common Eastern Bumble Bee | No season: the weeks are still too uncertain |
| Eastern Black Carpenter Ant | No season: the weeks are still too uncertain |
| Eastern Yellowjacket | No season: the weeks are still too uncertain |
| Northern Paper Wasp | No season: the weeks are still too uncertain |
| Two-spotted Bumble Bee | No season: the weeks are still too uncertain |
| Western Honey Bee | No season: the weeks are still too uncertain |
| Beetles | |
| Six-spotted Tiger Beetle | mid-April to late June, middle week May 31 – Jun 6 |
| Black Firefly | late May to late June, middle week Jun 14–20 |
| Red Milkweed Beetle | mid-June to mid-July, middle week Jul 5–11 |
| Goldenrod Soldier Beetle | mid-August to late September, middle week Sep 6–12 |
| Asian Lady Beetle | No season: recorded in two separate seasons |
| Reddish-brown Stag Beetle | No season: the weeks are still too uncertain |
| Spotted Cucumber Beetle | No season: the weeks are still too uncertain |
| Birds | |
| American Goldfinch | No season: the weeks are still too uncertain |
| American Robin | No season: the weeks are still too uncertain |
| Bald Eagle | No season: recorded through most of the year |
| Barred Owl | No season: the weeks are still too uncertain |
| Black Vulture | No season: the weeks are still too uncertain |
| Blue Jay | No season: recorded in two separate seasons |
| Canada Goose | No season: recorded in two separate seasons |
| Carolina Chickadee | No season: the weeks are still too uncertain |
| Carolina Wren | No season: the weeks are still too uncertain |
| Common Grackle | No season: the weeks are still too uncertain |
| Cooper's Hawk | No season: the weeks are still too uncertain |
| Double-crested Cormorant | No season: the weeks are still too uncertain |
| Downy Woodpecker | No season: recorded through most of the year |
| Eastern Bluebird | No season: recorded in two separate seasons |
| European Starling | No season: recorded through most of the year |
| Great Blue Heron | No season: the weeks are still too uncertain |
| Great Egret | No season: the weeks are still too uncertain |
| Green Heron | No season: the weeks are still too uncertain |
| House Finch | No season: recorded through most of the year |
| House Sparrow | No season: recorded through most of the year |
| Killdeer | No season: the weeks are still too uncertain |
| Mallard | No season: the weeks are still too uncertain |
| Mourning Dove | No season: the weeks are still too uncertain |
| Northern Cardinal | No season: recorded through most of the year |
| Northern Flicker | No season: the weeks are still too uncertain |
| Butterflies and moths | |
| Conifers and relatives | |
| Crustaceans | |
| Dragonflies and damselflies | |
| Ferns and clubmosses | |
| Fishes | |
| Flies | |
| Flowering plants | |
| Fungi | |
| Grasshoppers and crickets | |
| Mammals | |
| Reptiles | |
| Spiders | |
| True bugs | |
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