Bug FAQAlydus eurinus
Alydus eurinus · Order: Hemiptera · Family: Alydidae
Alydus eurinus is mostly dark with lighter spots on the legs and abdomen, but its head lacks side coloring. It lives in North America and feeds on legumes, later moving onto flowering plants like goldenrod and even carrion such as dead toads. A key way to tell it apart from the similar Alydus pilosulus is that the corners of its posterior pronotum plate are rounded, not angular.
Source: Wikipedia
How to recognize it
The bug is mostly dark with lighter markings on its legs and abdomen. It does not have any coloring on the sides of its head.
Source: Wikipedia
Where it lives
It is found in North America.
Source: Wikipedia
What it eats
It mainly eats legumes. Later in the season it can be seen on flowering plants such as goldenrod. It also feeds on carrion, for example a dead toad.
Source: Wikipedia
Where it comes from
It is native to North America.
Source: Wikipedia
Lookalikes
The posterior pronotum plate has rounded corners, unlike the more angular corners of Alydus pilosulus.
Source: Wikipedia
Where it is found in the US
Recorded in 44 of 51 states and DC. Most records: Illinois, Massachusetts, Kentucky, Virginia, New York, Pennsylvania, North Carolina, Texas.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Status: native in North America; native in Canada. Source: iNaturalist
Months it is reported in the US
Source: GBIF
More photos
Questions people ask
How can I tell Alydus eurinus apart from similar bugs?
Look at the back of the pronotum; Alydus eurinus has rounded corners, while Alydus pilosulus has angular ones.
Source: Wikipedia
What does Alydus eurinus eat?
It mainly feeds on legumes, later visits flowering plants like goldenrod, and will also eat carrion such as dead toads.
Source: Wikipedia
Same family (Alydidae)
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Alydus_eurinus
Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia
Text written 2026-10-24 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-24.