Spiders, Scorpions, Ticks, Harvestmen (Arachnida)
While the site is primarily for Iowa insects, I have included specimens that I have collected while on trips to other states. When you click on a species, you will see a map of Iowa and specimens collected in Iowa will show up.
Pictures have the owner's name in the caption unless they are mine. I have tried to make sure the name of the person who collected the specimen is shown in the "Collected by" field. This only applies to the family and species pictures. Specimen photos should be assumed to be the collector's.
Charts for this page only shows Iowa data.
Iowa Range Map
Midwest Range Map
Phenology
Observations by Year
Additional Information
Photos
No. of Observations
1,462
No. of Species
221
No. of Sites
212
Observations by Year
| 2025 | 0 |
| 2024 | 244 |
| 2023 | 190 |
| 2022 | 197 |
| 2021 | 82 |
| 2020 | 106 |
| 2019 | 49 |
| 2018 | 74 |
| 2017 | 61 |
| 2016 | 100 |
| 2015 | 93 |
| 2014 | 60 |
| 2013 | 30 |
| 2012 | 29 |
| 2011 | 42 |
Species by Year
| 2025 | 0 |
| 2024 | 58 |
| 2023 | 82 |
| 2022 | 86 |
| 2021 | 51 |
| 2020 | 56 |
| 2019 | 29 |
| 2018 | 50 |
| 2017 | 46 |
| 2016 | 52 |
| 2015 | 53 |
| 2014 | 37 |
| 2013 | 24 |
| 2012 | 27 |
| 2011 | 30 |
Sites by Year
| 2025 | 0 |
| 2024 | 40 |
| 2023 | 63 |
| 2022 | 48 |
| 2021 | 35 |
| 2020 | 25 |
| 2019 | 23 |
| 2018 | 23 |
| 2017 | 21 |
| 2016 | 35 |
| 2015 | 29 |
| 2014 | 22 |
| 2013 | 15 |
| 2012 | 12 |
| 2011 | 14 |
Sites
| Site Name | Observations | Last Observation |
|---|---|---|
| 1460 Douglas Ct, Marion | 106 | 2024-09-08 |
| MacBride Nature Recreation Area | 72 | 2024-09-08 |
| Geode State Park | 70 | 2024-08-18 |
| Shimek State Forest, Donnellson Unit | 66 | 2024-08-18 |
| 700 Black Bear Bend | 47 | 2024-09-09 |
| Hitaga Sand Ridge Prairie Preserve | 41 | 2024-07-14 |
| F. W. Kent Park | 40 | 2024-05-27 |
| Ciha Fen Wildlife Preserve | 24 | 2024-07-20 |
| Iowa City Site 1 | 23 | 2014-09-04 |
| Big Sand Mound Prairie Preserve, Muscatine County | 22 | 2024-08-28 |
| Willow Creek/Kiwanis Park | 21 | 2022-10-03 |
| Shimek State Forest, Croton Unit East | 20 | 2024-08-11 |
| Hawkeye Willdlife Management Area | 20 | 2024-07-04 |
| Lacey-Keosauqua State Park | 20 | 2020-09-24 |
| Red Oak Prairie | 19 | 2022-10-01 |
| Eddyville Sand Prairie Park | 18 | 2024-05-27 |
| Wanatee County Park | 18 | 2023-08-02 |
| 2505 Tullamore Lane, Ames | 18 | 2010-05-29 |
| Slip Bluff County Park | 17 | 2024-08-24 |
| Cangleska Wakan | 17 | 2023-07-08 |
| Timberhill | 15 | 2023-06-27 |
| Terry Trueblood Recreation Area | 14 | 2024-09-14 |
| Heritage Valley | 14 | 2022-07-16 |
| Shimek State Forest, Lick Creek Unit | 13 | 2024-06-09 |
| Matsell Bridge Natural Area | 13 | 2023-07-16 |
View All Sites
Observations for protected species or from private sites are not included in this list.