Currently viewing the category: "Tarantulas and Trapdoor Spiders"
What's That Bug? does not endorse extermination

Ed. Note:  March 22, 2017
We are currently experiencing technical difficulties and we cannot upload any new images.  Please be patient while we research this problem.

Subject: Trapdoor Spider?
Location: North of Tucson, Arizona, USA
March 19, 2017 6:58 pm
She wasn’t too happy to be shoveled out of my garden while I was pulling up weeds and turning soil.
She was clinging to a strip of silk “fabric”, so I’m guessing she’s a trapdoor spider? I’ve never seen one outside one of their holes before.
Signature: Ema

Trapdoor Spider

Dear Ema,
We love digging up critters in the garden.  Earlier this year, we were pulling out weeds and we discovered a California Slender Salamander.  We agree this is a female Trapdoor Spider.  We will attempt to identify the species.  Though the face is not showing on your individual, it resembles this Red Moustached Trapdoor Spider on Arachnoboards.  This might be a member of the genus
Ummidia as pictured on BugGuide.

What's That Bug? does not endorse extermination

Subject: Huge spider
Location: Akumal near the beach and next to the jungle
March 11, 2017 7:28 pm
Found this in our bedroom tonight in Akumal, Mexico after a rainy day.
Signature: Lisa

Tarantula

Dear Lisa,
This sure looks like a Tarantula to us.

What's That Bug? does not endorse extermination

Subject: Found in home
Location: Jakarta Indonesia
March 5, 2017 6:35 am
Hi Bugman, i found the attached picture of the spider in my outside kitchen, wondering if it was a dangerous species and if it nests nearby as i have kids and want to be sure everything is safe.
Signature: Jawad

Trapdoor Spider

Dear Jawad,
This appears to us to be a Trapdoor Spider.  We have not had any luck matching your image to a specific species.  Trapdoor Spiders are harmless and they live in underground burrows.  Females rarely leave their underground burrow, but male spiders will travel in search of a mate.

What's That Bug? does not endorse extermination

Ed. Note:  We have never heard of a situation where Spiderlings remain together after leaving the female’s protection, and we suspect the “conga line” you witnessed was of creatures other than Spiders.  The behavior you describe is more typical of social insects like ants or immature Hemipterans.  Are you able to provide an image?

Subject: spiderlings traveling in a “conga line”
Location: Chemuyíl Pueblo, México Yucatán
January 8, 2017 10:58 am
There are many unusual bugs in the jungle here, such as spiders and scorpions that carry their babies on their backs.
I was delighted to find your site – thanks!
Can you tell me about spiderlings traveling in a “conga line”, hundreds of them? Why?
Signature: Malcolm

Tarantula Spiderling “Conga Line”

Hi again Malcolm,
Thanks for sending an image.  Our initial response to you expressed our doubt that Spiderlings would travel the way you described.  We retract our supposition.  These do indeed look like Spiders.  We will attempt to find additional internet documentation that can explain it.

Tarantula Spiderling “Conga Line”

Tina Shaddock comments on Facebook
I believe these are plausibly Brachypelma vagans spiderlings and this article holds a bit of info about what is occurring in this photo.
https://www.researchgate.net/figure/262617778_fig1_Figure-1-A-column-of-about-200-B-vagans-spiderlings-observed-on-the-road-by-the

Ed. Note:  Here is a quote from the linked article:  “The spiderlings, which have a body length of about 2-3 mm, stay in the maternal burrow for several weeks. Little is known of this gregarious stage in this species, although spiderlings have been observed moving around the entrance of the maternal burrow, in where their mother is hunting in a sit-and-wait position. They often climb over each other but avoid contact with the mother. During daytime, the spiderlings were known to remain active and visible at the entrance of the burrow for up to one hour after the female had retreated. They were able to move easily through the web covering laid by the female over the burrow entrance (Shillington & McEwen 2006). Authors hypothesized that the silk network around the burrow provides an important chemotactic cue for orientation (Minch 1978) and juveniles probably remain in contact with this network at all times. After this gregarious period, the spiderlings disperse in the form of columns of about 100 siblings walking away from the mother’s burrow (Reichling 2000, 2003; Shillington & McEwen 2006). Shi- llington & McEwen (2006) observed that during the night of May 24 th 2003, spider- lings left the maternal burrow in three lines. Then at random intervals, one individual left the column and headed in a different direction, causing successive forks in the column. The maximum observed distance of dispersal was 9 m from the maternal burrow. Dispersal is observed in several spider species, including several species of mygalomorphae, all using silk for ballooning (Coyle 1983) or orientation (Jean- son et al. 2004). Previous reports on B. vagans mention that the spiderlings walk in line like ants (Reichling 2000), but no work has recorded the use of silk during dispersal. During their gregarious and dispersal phases the spiderlings do not show any aggressive behavior toward each other, as many spiders do (Gundermann et al. 1986; Jeanson et al. 2004).”

Thank you! That description sounds entirely likely – location, environment, and behavior. And attached is a photo of an adult found outside the house. Who would have guessed? I feel happy to understand the critters here in more depth.
For what it’s worth, I’d wager the spiderlings stay in line visually. From their non-colliding dynamics, and seeing individuals lose their place in line and orient from an inch away to rejoin.
Thanks again.
Malcolm

Tarantula

Hi Malcolm,
Thanks for sending an image of what we believe to be an adult male Tarantula.  We will be featuring your posting for a spell.

What's That Bug? does not endorse extermination

Subject: Huge black spider in our bed
Location: Santa Rosa, CA
December 1, 2016 9:44 pm
My wife found this huge black spider crawling on our bed. Would you happen to know what it is?
Signature: Michael K

Tarantula

Tarantula

Dear Michael,
This is most definitely a Tarantula, and it is most likely a male wandering in search of a mate.  Tarantulas might bite if carelessly handled, but the bite is not dangerous, causing little more than local swelling and tenderness.  Urticating hairs can cause irritation and a severe skin reaction in sensitive people.  We are postdating your submission to go live on Christmas Day when we will be out of the office for the holidays.

Tarantula

Tarantula

Wow.  That is amazing.  We had thought it was a female crevice weaver.  So cool to find out it was actually a tarantula.  Thank you so much.  I really appreciate you taking the time to look at those pictures.
Michael

What's That Bug? does not endorse extermination

Subject: Massive spider maybe 7 inches in Trinidad
Location: Trinidad, Caribbean
December 2, 2016 3:24 pm
My son and myself came across this massive spider on a bamboo patch in a small park area near our house. My son said it was a “Huntsman spider” but I am unsure he is correct (smart kid though). see pics below
Signature: Dion Santana

Tarantula

Tarantula

Dear Dion,
What a gorgeous Tarantula you encountered.  But for the lack on markings on the abdomen of your individual, we believe it resembles this Trinidad Chevron Tarantula,
Psalmopoeus cambridgei, which is pictured on YouTube.   Normally we refrain from citing Wikipedia, but it was there we learned the Trinidad Chevron Tarantula is “endemic to Trinidad” and “The female has chevron-shaped dark markings on the abdomen and her colour varies through shades of green and brown with characteristic red or orange flashes on the legs. The male is a more uniform grey or brown colour. It is a large, hairy, fast growing species that reaches six inches in leg span.”  The lack of markings and the longer legs indicates your individual is a male, and it sure looks like these male Trinidad Chevron Tarantulas pictured on Project Noah and Angelfire.  According to Tarantulas of the World:  “these animals spend most of their time up in trees blending in with their environment.”  Because we are preparing for a trip away from the office for the holidays, we are postdating your submission to go live at the end of the month.

Tarantula

Tarantula

Thank you very much 🙂

What's That Bug? does not endorse extermination