Thousands of pest photos submitted for identification.

Brown marmorated stink bug

7239.        London, On. Canada

Number 7239. This is a brown marmorated stink bug, Halyomorpha halys (Hemiptera/Heteroptera: Pentatomidae). This is an introduced species that has become a pest, primarily in orchards, in many areas of North America. They will come indoors in search for shelter, but do no harm there. Brown marmorated stink bug detailed information 

Giant stonefly

7238.        Hi, We saw this insect crawling on the cement in our back yard about a half-hour ago and have never seen one before, here or anywhere. It is about 1-3/4″ to 2″ long. It has wings but did not fly. Would you mind terribly identifying it for us? Edmonton, Alberta. Canada

Number 7238. It’s a giant stonefly (Plecoptera: Pteronarcidae). These are harmless insects whose aquatic immature stages form an important part of the freshwater food web.  Giant Stonefly Additional Information 

Giant ichneumon wasp

7237.        Picture taken June 22nd, 2021 on a tree close to the red River. Winnipeg, MB. Canada

Number 7237. This is Megarhyssa atrata, a giant ichneumon wasp (Hymenoptera: Ichneumonidae). These wasps use their long ovipositor to insert their eggs into the tunnels made by larvae of wood wasps in the family Siricidae. When the eggs hatch, the ichneumon larvae feed on the wood wasp larvae. These wasps have no stinger or venom, and are harmless to humans. Giant Ichneumon Wasp Life History 

Wharf borer

7236.        See a few of them everyday. They like to drop down on me from the ceiling or walls. Might be coming from our windows which are old and not sealed well. Ottawa, ON. Canada

Number 7236. This looks like a wharf borer, Nacerdes melanura (Coleoptera: Oedemeridae). Their larvae feed on wet/waterlogged and decayed wood; the adult beetles appear to be pollen feeders. This a European species that now is widely distributed in North America;  Wharf Borer Detailed Information 

Masked hunter

7235.        Found in the bathroom sink within my apartment; it originally seemed to crawl out of the bathroom sink overflow and was found the next day back in the sink. It’s the middle of June, the weather over the past week has been between pleasantly warm to stormy and sweltering; the insect itself was about the size of a quarter. I wanted to check; is this a kissing bug or a masked hunter? I’ve been reading, but I’m by no means a professional and I’m not 100% positive on how much overlap there is, and I wasn’t about to let it bite me to find out for sure; reading, it seemed like the most northern kissing bug is the Eastern Conenose Kissing Bug which doesn’t go much further north of Southern Illinois. The Conenose also has red and black colouration and a visible beak. whereas a Masked Hunter is more slender, completely black, and has no visible beak. Do I have the right of it? I wanted to be totally sure because pest identification entry for Kissing Bugs used a photo of a subject that looks extremely similar to the one I found; I’m not sure if it’s my identification that’s wrong or theirs. (Entry link: ) London, Ontario. Canada

Number 7235. This definitely a masked hunter, (Reduvius personatus; Hemiptera/Heteroptera: Reduviidae). Masked Hunter Detailed Information 

Tiger moth

7234.        Wheatland County, Alberta. Canada

Number 7234. This is a tiger moth (Lepidoptera: Erebidae; subfamily Arctiinae); it appears to be Apantesis williamsii, known as Williams’ tiger moth.  Tiger Moth Images 

Tarnished plant bug

7233.       I found this bug in my backyard, could I ask what’s this bug and whether it is a pest? Thank you very much. Edmonton, AB. Canada

Number 7233. This is a tarnished plant bug, Lygus lineolaris (Hemiptera/Heteroptera: Miridae). This is a very common and widespread pest species;  Tarnished Plant Bug Detailed Information 

Larva of Asian multi-coloured lady beetle

7232.      ORILLIA, ON. Canada

Number 7232. This is a larva of the introduced Asian multi-coloured lady beetle, Harmonia axyridis (Coleoptera: Coccinellidae). The adult beetles show a remarkable variety of colour patterns; Click here for some examples.

Plant bug

7231.      This insect was on my arm, June 8th 2021. Very humid summer weather at the time. Thanks for your time. Toronto, Ontario. Canada

Number 7231. This is a plant bug (Hemiptera/Heteroptera: Miridae) in the genus Lygus. Some of these can be serious pests; see plant bug detailed information 

Male nursery web spider

7230.       Found this large tan/brown spider on my couch! I think he was under the dog bed I moved to vacuum. He was already not moving much. It has been hot the last couple days, in the low 80s. I live in west Michigan. His body is about 1/2 inch (12.7mm) long and with his legs out he’s just over 1 1/2 inches (38mm). Muskegon, MI. United States

Number 7230.  This most likely is a male nursery web spider, Pisaurina mira; a harmless accidental intruder.  Click here for an image of a live specimen.

Rat-tailed maggots

7229.        Courtenay, BC. Canada

Number 7229. These are rat-tailed maggots, larvae of a fly in the family Syrphidae (flower/hover flies). They are harmless scavengers usually found in water having a very high organic material content; the adult flies can be valuable pollinators.

Scarlet malachite beetle

7228.       Found this bug crawling in my carpet. Is it harmful? Edmonton, Alberta. Canada

Number 7228. This is not a pest, it is a scarlet malachite beetle, Malachius aeneus (Coleoptera: Melyridae), an introduced European species. See scarlet malachite beetle detailed information 

Caterpillar of the gypsy moth

7227.     I am finding lots of these insects on the plants in my garden. May you pls help identify what is this and how it can be controlled? Thanks. Brampton, Ontario. Canada

Number 7227.  This appears to be a caterpillar of the gypsy moth (Lymantria dispar; Lepidoptera: Lymantriidae), a very destructive introduced species.  gypsy moth caterpillar detailed information 

Giant conifer aphids

7226.    Noticed these seemingly blocked by duct tape on our Pine tree. Any ideas what they are how to get rid of them? Newmarket, Ontario. Canada

Number 7226.   These appear to be giant conifer aphids (Hemiptera/Sternorrhyncha: Aphididae; Cinara sp.). They are unlikely to cause serious harm, but they can be easily dislodged with a strong stream of water from a garden hose; this will also kill many of them. Aphids detailed information 

Orb weaver

7225.    Many large spiders found hanging from fluorescent lights in early morning and late night Spring through to Fall outside Condominium building. Is it dangerous to humans or dogs if bitten? Ottawa, ON. Canada

Number 7225.  It’s an orb weaver (family Araneidae). Orb weavers are harmless to humans. Click here for an example

Caterpillar of a moth

7224.    I found this caterpillar under a rock in my garden during the spring and I would like to know what type of caterpillar it is. It is a small caterpillar with no fur or spikes. Hamilton, Ontario. Canada

Number 7224.    It’s a caterpillar of a moth in the family Noctuidae, and in a group known collectively as cutworms. Some species can be quite destructive. Click here for an example.

earth/soil centipede

7223.    Found this crawling in my bed. Squeezed it in a paper several times. Didn’t seem to die until several times of crushing. Bracebridge, Ontario. Canada

Number 7223.  This is an earth/soil centipede (order Geophilomorpha) that accidentally got indoors. They are completely harmless;  earth/soil centipede detailed information 


7222.      Not sure what this is but I see them in clusters. Toronto, ON. Canada

Number 7222. This is a springtail, a primitive arthropod in the order Collembola, closely related to true insects. These basically are harmless scavengers on bits of decomposing organic matter, but they can become nuisance pests when they occur indoors in large numbers. They are quite susceptible to desiccation, so keeping indoor humidity levels as low as practical is the best control. Springtails Detailed Information

Sphinx moth

7221.      Hello sir, Please tell me pest name. Tehsil, District Hanumangarh Rajasthan. India

Number 7221. This is a sphinx moth (Lepidoptera: Sphingidae); it looks like Cephonodes hylas –  sphinx moth detailed information  

Yellow sac spider

7219.      Detached house, south-west Mississauga, Ont. Indoor, Bedroom, on the bed near the pillow. June 10/21, 5:30am. Spider is about 1.0 cm length, body & legs. Reddish-brown colour. Large abdomen, relative to the rest, with pattern on top and small yellow spot on underside near cephalothorax. While we do have spiders, including cellar, jumping and yellow sac spiders, we have been in our home 20+ years and have not seen this spider before and would like to know what it is. Gave a painful bite to my wife’s arm while sleeping. After 1 week, bite location became red, about 2 cm across, and very itchy. Thanks. Mississauga, ON. Canada

Number 7219. This is a yellow sac spider (family Cheiracanthiidae) in the genus Cheiracanthium. They can have a painful bite, but it is not considered medically significant. [Note: Some authorities place these spiders in the family Eutichuridae.] yellow sac spider example 

Assassin bug

7218.         Working from home and felt this painful bite and this is what was on my ankle bit me twice I think. Want to rule out kissing bug. Please let me know asap what you think this may be. GEORGETOWN, Ontario. Canada

Number 7218. This is an assassin bug known as a masked hunter (Reduvius personatus; Hemiptera/Heteroptera: Reduviidae), a cosmopolitan species often found indoors and indeed is reputed to have a very painful ‘bite’-  Assassin Bug Detailed Information 

Whitemarked spider beetle

7217.       Found lots in my parents basement lots in a bedroom some in a bedroom. Prince Albert, Saskatchewan. Canada

Number 7217. This looks like a whitemarked spider beetle, Ptinus fur (Coleoptera: Ptinidae), a cosmopolitan pest species hat will feed on a wide variety of dried and decaying organic materials, including insect specimens, wasp nests, feathers, animal skins, dried herbaria plants, seeds and grains, and sry stored foodstuffs. whitemarked spider beetle detailed information .

Asian multi-coloured lady beetle

7216.     This is only about a quarter inch long. If that. Is this poisonous? Do they bite? Do I need to worry about infestation? Brampton, Ontario. Canada

Number 7216. This is a larva of the introduced Asian multi-coloured lady beetle, Harmonia axyridis (Coleoptera: Coccinellidae). They feed on aphids and other small, soft-bodied invertebrates. Asian Multi Colored Lady Beetle detailed information 

Click beetle

7215.    Found on bedding in June. Markham, Canada

Number 7215. This appears to be a small click beetle (Coleoptera: Elateridae); a harmless accidental intruder. Click Beetle detailed information 

Larva of a carpet beetle

7214.     Found a couple of these millipede looking bugs on my floor. I live in a first floor apartment in downtown Montreal. Saw them appearing in May. It is pretty hot in my apartment, slightly humid. Find them mostly in the bathroom, but also near my desk and bed. montreal, Québec. Canada

Number 7214. This is a larva of a carpet beetle (Coleoptera: Dermestidae) in the genus Attagenus (black carpet beetles and allies). Carpet Beetle Control Information

Oriental beetle

7213.    It’s in my bed, it was dead, it’s like spring weather today, other days hotter. It’s a beach house. Wildwood, New Jersey. United States

Number 7213.  This looks like an Oriental beetle, Anomala orientalis (Coleoptera: Scarabaeidae).  Oriental Beetle detailed information.

Nymph of an Eastern Boxelder Bug

7212.      Navan, Ontario. Canada

Number 7212.    This appear to be a nymph of an eastern boxelder bug, Boisea trivittata (Hemiptera/Heteroptera: Rhopalidae), a very common nuisance pest.  Nymph of an Eastern Boxelder Bug detailed information , including some control recommendations.

Clover Mite

7211.        These little bugs are quite small (2-3 mm) and around my basement window sills. Winnipeg, MB. Canada

Number 7211.      This is a clover mite (Bryobia praetiosa). These basically are nuisance pests that do no real harm.  Clover Mite Detailed Information  

Sac Spider

7210.         Pembroke, ON. Canada

Number 7210.      This appears to be a sac spider in the genus Cheiracanthium.  Sac Spider Example  They can deliver a painful, but not dangerous bite;  Sac Spider Detailed Information 

Great Grig

7209.       Golden, British Columbia. Canada

Number 7209.       This is a relative of grasshoppers and crickets known as the great grig (Cyphoderris monstrosa; Orthoptera: Prophalangopsidae).  Great Grig Detailed Information 


7208.      Corner Brook, NL. Canada

Number 7208.      This is a pseudoscorpion, an arachnid related to spiders and true scorpions that prey on other small arthropods. They are non-venomous and harmless to humans. Pseudoscorpion Detailed Information 

Centipede – Chilopoda

7207.       Copper Horn Town, Radium Hot Springs BC. Canada

Number 7207.      This is a centipede (class Chilopoda) in the family Lithobiidae (stone centipedes); they are not dangerous to humans.  Centipede Detailed Information