Community Pollinator Survey, Ann Arbor City

As of June 8, We've added a genus-level network and table summarizing all data for Ann Arbor City Parks (Marshall, Bird Hills, Mary Beth Doyle). What does it all mean? In the next month, after reviewing the data across all sites and plants, we will put together an analysis. There will be a lot to say.

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A few notable species from City sites

One of the several species of cuckoo bee found on many flowers across all sites. These are parasitic on mining bees  Still working on species IDs.
Above: Osmia bucephala, male bufflehead mason bee

Below: Osmia atriventris, a female mason bee. The brush of hairs (scopae) under the abdomen are a feature of the family Megachilidae.
Above: A bristle fly (Tachinidae), a parasitoid.

Below: Hoplitis producta. The bent tips of the antennae are a feature of the males.

City Parks — Insect species by Plant, 2026

Group ID Bramble Buttercup Cornus Dandelion Fleabane Geranium Ragwort Spring beauty
Bee Andrena NOTfulgida1
Andrena crataegi1
Andrena cressonii111
Andrena imitatrix21
Augorochlora pura1010
Bombus griseocollis1
Ceratina sp621622
Dialictus sp1
Halictus ligatus131
Hoplitis producta4
Hylaeus affinis1
Lasioglossum dialictus2
Nomada armatella3
Nomada bidentate1
Nomada cressonii2
Nomada florilega5
Nomada luteoloides5
Nomada red12
Nomada red red4
Nomada sp333
Osmia albiventris1
Osmia atriventris3
Osmia bucephala1
Osmia cornifrons3
Osmia sp11
Xylocopa virginica1
Coleoptera Cyrtophorus verrucosus1
Molorchus bimaculatus1
Pidonia vibex3
Trichiotinus assimilis1
Lepidoptera Celastrina ladon2
Phyciodes tharos3
Polites sp1
Non-syrph fly Bombylius major18
Myopa sp1
Nemotelus sp2
Syrphid Cheilosia sp11
Gymnosomatini1
Toxomerus geminata1
Total visitors 2212440301941

David Cappaert, Update June 10, 2026

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