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Ptilothrix bombiformis bee #775845
Asked October 19, 2021, 4:45 PM EDT
Knox County Ohio
Expert Response
Life cycle of ground-nesting bees
Bees are holometabolous, and their life-stages vary in duration depending on the species and its environment (e.g. temperature, length of the flowering season). Some species or populations are multivoltine, meaning they produce several generations per year (Michener, 2007; Danforth et al., 2019), while others have just one, or take even more than a year to complete a generation (Forrest et al., 2019). For solitary ground-nesting bees, the activity period starts with the emergence of adults from their underground nests followed by mating, and the active period may last only a few weeks. Among social species, the active season can last for months, as successive generations of adult workers are produced by the foundress. Females of all bee species store sperm in their spermathecae, which allows them to spend the rest of their life after mating building their nest, provisioning brood cells and laying eggs. Eggs hatch within a few days (up to 6 days for Andrena vicina Smith, Andrenidae; Miliczky & Osgood, 1995). The progeny then enter the larval stage, during which they consume the food reserves provided by their mother or their sisters (in social species). In temperate regions, many solitary bee species overwinter in the prepupal stage, sometimes within cocoons, before completing metamorphosis in the spring. Other species complete metamorphosis before overwintering as adults, again sometimes within their cocoons. Regardless of their developmental stage, solitary ground-nesting bees, as well as the foundresses of some social species, spend the winter in a dormant state within the larval brood cell; thus, the mother's choice of nesting site determines her offspring's overwintering location. Immature bees can spend several months (sometimes more than a year; Torchio, 1975; Danforth, 1999) of their lives below-ground, where they are susceptible to environmental hazards such as wildfires (reviewed by Cane and Neff 2011) and flooding (Roubik & Michener, 1980; Fellendorf et al., 2004), before emerging as adults that are active for only a few weeks.
There is not a lot of specific info regarding most of the ground nesting solitary bees. I have included a link on the hibiscus bee to help you make an accurate ID. Based on your photos, this could be a bumblebee. Hibiscus bees have hairy hind legs which could ID it as such. This link also has resources for the Hibiscus bee.
https://www.fs.fed.us/wildflowers/pollinators/pollinator-of-the-month/rosemallowbee.shtml
If these are bumblebees, the nest is only used for one season and then abandoned.
https://xerces.org/bumblebees/about
At any rate, these bees are native and part of our local ecosystems and should not be destroyed. Based on my research, the nest by your home is not permanent.
I have also included a guide from the ODNR which includes the Hibiscus bee so that you can read more about it.
https://camp-joy.org/wp-content/uploads/2020/06/Bees-and-Wasps-of-Ohio-Guide.pdf