Currently viewing the tag: "Invasive Exotics"
What's That Bug? does not endorse extermination

Subject: Keep getting these in the house
Location: Ma
January 25, 2015 6:29 am
I live in MA and they have been coming since we moved in in June.
Signature: Lisa

Brown Marmorated Stink Bug

Brown Marmorated Stink Bug

Dear Lisa,
This is an invasive, exotic species, the Brown Marmorated Stink Bug, and it was accidentally introduced to North America from China.  It has since spread across the continent and it is a nuisance to residents when it enters homes to hibernate.  It is also a significant agricultural pest.

What's That Bug? does not endorse extermination

Subject: What is this bug
Location: South Carolina
January 4, 2015 8:49 pm
I have found three of these in my house. What are they? They move slowly.
Signature: Hates bugs

Brown Marmorated Stink Bug

Brown Marmorated Stink Bug

Dear Hates bugs,
This is an invasive exotic species, a Brown Marmorated Stink Bug.  It was recently introduced to North America and spread rapidly across the continent.

What's That Bug? does not endorse extermination

Subject: ID Bug. please?
Location: Ventura County, CA
December 28, 2014 11:14 am
Hello. Happy New Year.
Can you ID this bug for us. They seem to be increasingly multiplying on our property in the
north end of the Santa Monica Mountains of Southern California. We grow some organic
fruits and want to make sure they are not a plant eating insect, or what we would have to do
in an organic way to handle them.
Thank you.
Clay
Signature: email

Mediterranean Red Bug

Mediterranean Red Bug

Dear Clay,
Though it is lacking an recognized common name on BugGuide, we have been calling the invasive exotic species
 Scantius aegyptius by the descriptive name Mediterranean Red Bug based on its site or origin and its common family name.  According to the Center for Invasive Species Research at UC Riverside:  “Recently, another brightly colored, mostly seed feeding bug belonging to the family Pyrrhocoridae or “Red Bugs” has become established in southern California and is drawing attention due to large aggregations of the bright red and black nymphs and adults feeding on annual broadleaf weeds in open space areas.  Scantius aegyptius, an old world pyrrhocorid bug, native to the eastern Mediterranean region, was documented for the first time in North America in Orange County during June of 2009.  Reports of this insect from other southern California locations (i.e., Riverside County) suggest that this insect has been established for a year or more prior to these Orange County collections.”  We suspect sightings of this Mediterranean Red Bug will be increasing in Southern California this winter, which makes your submission a very appropriate Bug of the Month for January 2015.

Sue Dougherty liked this post
What's That Bug? does not endorse extermination

Subject: Spider Zoropsis spinimana
Location: Oakland, California, USA
December 22, 2014 6:01 pm
I found this fellow (and I do believe it is a male) lurking on my living room wall in Oakland, California. At just over 2″ he’s too big to live with comfortably. So, into a capture jar, smile for a close up and then away to the garden with you.
I was able to get a few good photos and with a quick internet search had the spider ID. Seems that Zoropsis spinimana is an exotic introduction to Northern California and is native to the Mediterranean. Our local nature authority, the California Academy of Sciences of San Francisco, has been tracking its spread since it was first found in the San Jose area in the mid-1990’s.
It’s not aggressive, slow moving and not believed to be harmful. Likes crawlspaces, attics and houses.
I’ve written to you to help out others like myself who are curious about these critters.
Signature: JP

False Wolf Spider:  Zoropsis spinimana

False Wolf Spider: Zoropsis spinimana

Dear JP,
Thanks so much for your well researched submission and the helpful information you have provided for our readership.  As you have indicated, BugGuide states:  “Native to the Mediterranean coastal countries and northern Africa” and BugGuide also reports:  “This is the only species in the family found in BugGuide’s range.”  According to the UC Davis website:  “In the mid-1990s,
Zoropsis spinimana, a large spider from the Mediterranean region, started showing up in homes around the San Francisco Bay area. It has since become well established around the southern, eastern, and northern portions of the Bay and has become a permanent member of the California spider population. Although the known distribution is not very extensive, this spider does inhabit a part of the state that is densely populated by humans and Zoropsis is routinely found in homes, causing concern among the people who encounter it. However, it is harmless to people. This Pest Note was prepared to provide information regarding this non-native resident.  The first California reports of Zoropsis spinimana were from the Sunnyvale area in Santa Clara County in 1992. Since then the spider has mostly spread north and east around the San Francisco Bay area with specimens found throughout Santa Clara, San Mateo, Alameda, Marin, and Santa Cruz Counties. Scientists at the California Academy of Sciences in San Francisco are tracking the spider’s spread. So far, Zoropsis spinimana seems to be found only in and around human dwellings. However, it is also possible that this spider is establishing itself in natural vegetation areas.”

Sue Dougherty, Jessica M. Schemm liked this post
What's That Bug? does not endorse extermination

Subject: red white & black beetle
Location: Los Angeles, CA
December 19, 2014 9:39 pm
I thought this bug was pretty so I took a photograph of the design on it’s back. Later I couldn’t at all identify it, so I was hoping you would be able to help. It kept leaning away from me when I tried to take a picture. It was about a quarter of an inch long, including legs.
Thanks!
Signature: Caroline

Hello, I’m sorry to have bothered you, since I just identified the bug as Eurydema oleracea, a leaf beetle

African Painted Bug

African Painted Bug

Hi Caroline,
Though you have incorrectly identified the species, you do have the correct family. 
Eurydema oleracea which we located on British Bugs is not a Leaf Beetle.  It is a member of the family Pentatomidae, the Stink Bugs.  Your insect is an African Painted Bug, Bagrada hilaris, an invasive species that is damaging plants in the cabbage family including kale and collard greens.

What's That Bug? does not endorse extermination

Subject: Is this an elm seed bug? Found in Southern CA
Location: N Los Angeles County, Southern California
December 14, 2014 5:26 pm
Hi! I’ve been trying so hard to identify this bug, which just appeared in my back yard this year, maybe early summertime. I’m in north Los Angeles County (town is Littlerock), Southern CA. They’ve gone from lumbering in sort-of lines along the ground to huddling in large numbers around bushes and under wood or metal, to now huddling en masse in the crevices of one of my large chinese elm trees. I took pictures; they are black and red, similar it looks like in shape etc. to your photos of the elm seed bug, but the markings on my bugs seem a bit different. I have various birds living out back (goose, emu, peahen, guinea hen, and occasionally chickens) and am wondering if these bugs are beneficial to my plants and/or birds, or if they are harmful. So far they’re not in the house, but I’m a little worried that might change! I’d appreciate any help you can give me on identifying these cute little huddlers — hopefully they are the good kind! ( I have several more pictures, by the way – your site only allowed me 3 so I tried to pick out the best 3)
Signature: Heidi Brooks

Mediterranean Red Bug

Mediterranean Red Bug

Dear Heidi,
These are Mediterranean Red Bugs,
Scantius aegyptius, a species that was introduced to Southern California several years ago in about 2009 and it finds our climate to its liking, so it is proliferating.  Here is what the UC Riverside Center for Invasive Species Research states:  “Damage: The literature contains very little information regarding the biology of S. aegyptius and Scantius species in general are not considered to be economically important species.  In California, Scantius has been observed feeding on the developing seeds and stems of Knotweed (Polygonum spp.) and Malva (Malva parviflora).  It is likely that S. aegyptius will feed on the seeds of several species of annual herbaceous plants.
The most noticeable impact of S. aegyptius in California will likely be the presence of large numbers of nymphs and adults migrating from drying annual weeds into adjacent developed areas.  These migrations consisting of thousands of individuals can be very conspicuous and lead to large aggregations on small patches of host plants causing concern to local residents who notice these obvious aggregations.”  Though they pose no immediate threat to crops, native plants or animals, the presence of a non-native species in large numbers can have significant effects on native species by displacing them in an ecosystem.

Aggregation of Mediterranean Red Bugs

Aggregation of Mediterranean Red Bugs

Hi Daniel,
Thank you so much for taking the time to respond!  I got your email this morning, plus responses on Facebook after I asked about these insects there as well.  I have a British friend who lives in Germany and encounters these red “fire bugs” often in his walks through the woods.  He sent me this link, where I learned more interesting info about them, and I’d like to pass it on to you.  It’s a German site translated into English (thanks, Google), and while parts of the translation are a bit amusing, I did learn more about these little huddle-bugs:
https://translate.google.de/translate?sl=de&tl=en&js=y&prev=_t&hl=de&ie=UTF-8&u=http%3A%2F%2Fwww.schaedlingskunde.de%2FSteckbriefe%2Fhtm_Seiten%2FFeuerwanze-Pyrrhocoris-apterus.htm&edit-text&act=url
My friend also said that he notices wasps hang around the red bugs, so not sure if they are tasty to the wasps (or vice-versa).
Thanks again!
Cheers,
Heidi Brooks

Dear Heidi,
The link you provided is for a Firebug, a different species in the same family.  Again, your species is Scantius aegyptius and you can find more information on BugGuide.  When we first posted images of the Mediterranean Red Bug in 2010, we also incorrectly identified it as a very similar looking Firebug.

Wow!  I didn’t notice that – the markings are so specific, with a triangle and 2 dots, I thought they were the same bug.  I’ll have to do a little more research then, I think.  It’s been difficult to find much about these insects, but at least I know that they don’t seem harmful to my plants or people.  Thanks again — your responses mean a lot to me!
Cheers,
Heidi

Amy Gosch liked this post
What's That Bug? does not endorse extermination