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Species / Taxon Name
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Photos / Sounds

What

Typical Spiders Suborder Araneomorphae

Observer

tigerbb

Date

July 4, 2020 09:13 PM MDT

Description

While outside, I noticed this web in a stack of old outdoor chairs. It is approximately an inch and a half from top to bottom. I've never seen another like around my yard. Unfortunately there was no spider.

Photos / Sounds

Observer

tigerbb

Date

July 4, 2020 09:04 PM MDT

Description

Inside a small plastic shed. Two individuals pictured. This spot used to be frequented by several Steatoda triangulosa, and I was ecstatic the first time I found one of these linyphiids. Now I don't see any Steatoda---only signs one in an empty web---but this linyphiid species seems to be proliferating here and throughout my yard.

Photos / Sounds

Observer

tigerbb

Date

July 3, 2020 10:44 AM MDT

Description

While examining some wild roses at the back of my yard, this little cutie was ballooning from branch to branch. If you look closely, you can see several setae on the carapace.

Photos / Sounds

What

Orbweavers Family Araneidae

Observer

tigerbb

Date

July 3, 2020 10:25 AM MDT

Description

On a rose bush just outside my back door. Strangely, I have only ever seen early instar juvenile orbweavers in my yard. I don't know why they leave, when they go, or where they go to. I also don't know how many genera or species come here, because I can never identify them, though there has definitely been some variety. I certainly wish some would stick around! For size comparison, in addition to the photo with my hand (which is quite small for an adult), the first image has baby aphids on the right.

Photos / Sounds

What

Ground Crab Spiders Genus Xysticus

Observer

tigerbb

Date

July 3, 2020 10:18 AM MDT

Description

I picked up a small bunch of leaf litter below yard tools on the back of my house, and this is what was in it. Immediately, these hatchlings started pouring out of the sac. I shot a few quick photos and carefully put the leaf litter back where I found it.

Photos / Sounds

What

Jumping Spiders Family Salticidae

Observer

tigerbb

Date

July 3, 2020 10:09 AM MDT

Description

Either a juvenile Attinella dorsata or Attulus ammophilus, both of which are known to be in this spot. For size comparison, see the last photo, where it is running down the door trim next to the brick wall. The gray part is brick mortar.

Photos / Sounds

What

Triangulate Combfoot Steatoda triangulosa

Observer

tigerbb

Date

July 3, 2020 12:44 AM MDT

Description

Just inside a rear entrance

Photos / Sounds

Observer

tigerbb

Date

July 2, 2020 04:35 PM MDT

Description

I don't believe I've seen any other pholcids besides Pholcus in my home before, so this was a fun surprise. I found him half curled up on a baseboard in a disused corner of my bedroom.

Photos / Sounds

What

Paradise Spiders Genus Habronattus

Observer

tigerbb

Date

July 2, 2020 10:06 AM MDT

Description

On the ground next to my shed. Seeing lots of young Habros around my yard right now.

Photos / Sounds

Observer

tigerbb

Date

July 2, 2020 09:55 AM MDT

Description

Probably a juvenile P. audax. On the leaf of one of my rose bushes, which have been sadly quite empty lately.

Photos / Sounds

What

Barn Funnel Weaver Tegenaria domestica

Observer

tigerbb

Date

July 2, 2020 09:48 AM MDT

Description

I was trying to focus on a small linyphiid hanging nearby, which I had returned to this stump to photograph. I hadn't even noticed the presence of this spider that the camera had focused on instead until I reviewed my photos.

Photos / Sounds

Observer

tigerbb

Date

July 2, 2020 09:42 AM MDT

Description

I believe the shape of the eyes is diagnostic of Drassyllus. The appearance of the front legs also resembles this genus.

Photos / Sounds

What

Hobo Spider Eratigena agrestis

Observer

tigerbb

Date

July 2, 2020 09:35 AM MDT

Description

Under a piece of wood on the ground near the back of the yard

Photos / Sounds

What

Typical Spiders Suborder Araneomorphae

Observer

tigerbb

Date

July 2, 2020 09:35 AM MDT

Description

Several of these sacs, mostly already open, under a piece of wood on the ground near the back of the yard.

Photos / Sounds

What

Typical Spiders Suborder Araneomorphae

Observer

tigerbb

Date

July 2, 2020 09:34 AM MDT

Description

The largest and most defined sac like this that I have found. Under a piece of wood on the ground near the back of the yard.

Photos / Sounds

What

Common Spitting Spider Scytodes thoracica

Observer

tigerbb

Date

July 2, 2020 09:28 AM MDT

Description

Behind an old piece of particle board

Photos / Sounds

What

Ground Crab Spiders Genus Xysticus

Observer

tigerbb

Date

July 2, 2020 09:26 AM MDT

Description

On tall weed. There are baby spiders everywhere, and apparently this is the year for Xysticus in every corner of my yard!

Photos / Sounds

What

European Ant-eating Spider Zodarion rubidum

Observer

tigerbb

Date

July 1, 2020 07:59 PM MDT

Description

Under leaf litter. I went in search of this species outside my home and was not disappointed. Hoping to have this one lab-confirmed.

EDIT: Thank you to Ken Schneider (@kschnei) for examining and confirming my Z. rubidum! I've added Ken's photomicrographs. This little spider is now a part of the Cal. Academy of Sciences' collection, CASENT 9096659.

Photos / Sounds

What

Typical Spiders Suborder Araneomorphae

Observer

tigerbb

Date

July 1, 2020 07:12 PM MDT

Description

I was wondering if this could be Piabuna, but now I'm thinking it might be a baby Zodarion. Found in leaf litter. My limited equipment really made it hard to get decent photos of this little thing! They may not look like much, but I included many that can be zoomed into for different types of details. And in some photos, I bumped up the contrast to try to bring out more details. In the end, as I was holding the spider on a tiny bit of a weed, it simply vanished. The frustration of a mini spider and no scope! I hope someone can help narrow this one down.

Photos / Sounds

What

Social Cobweb Weavers Genus Theridion

Observer

tigerbb

Date

July 1, 2020 04:55 PM MDT

Description

Found in a healthy patch of Vinca major

Photos / Sounds

What

Ground Crab Spiders Genus Xysticus

Observer

tigerbb

Date

July 1, 2020 04:52 PM MDT

Description

Between tall grass and the base of the house. There were a few egg sacs in a row, but the others were unattended.

Photos / Sounds

What

Utah Crab Spider Bassaniana utahensis

Observer

tigerbb

Date

July 1, 2020 04:45 PM MDT

Description

Just as I was closing the doors to the small shed with an adult Bassaniana on the door, this little hatchling appeared out of nowhere.

Photos / Sounds

What

Utah Crab Spider Bassaniana utahensis

Observer

tigerbb

Date

July 1, 2020 04:44 PM MDT

Description

Sitting on the door of a small shed. I usually only see these on my wood gate or fence, so this was unusual.

Photos / Sounds

What

Common Spitting Spider Scytodes thoracica

Observer

tigerbb

Date

July 1, 2020 04:40 PM MDT

Description

Hanging out inside a small shed. I couldn't get it to budge.

Photos / Sounds

What

Ground Crab Spiders Genus Xysticus

Observer

tigerbb

Date

July 1, 2020 04:36 PM MDT

Description

Came crawling out of leaf litter. So small I kept losing sight of it.

Photos / Sounds

What

Ground Spiders Family Gnaphosidae

Observer

tigerbb

Date

July 1, 2020 04:13 PM MDT

Description

Under a rock

Photos / Sounds

What

Jumping Spiders Family Salticidae

Observer

tigerbb

Date

July 1, 2020 03:01 PM MDT

Description

All the black stuff visible in this nest, which at first looked to me like frass, was moving around. When I returned 2 days later, there was no sign of black. I'm pretty sure this was a nest of Phidippus audax hatchlings.

Photos / Sounds

Square

What

Brush-legged Spiders Genus Schizocosa

Observer

tigerbb

Date

July 1, 2020 02:57 PM MDT

Description

My dominant backyard wolf species

Photos / Sounds

What

Sheetweb and Dwarf Weavers Family Linyphiidae

Observer

tigerbb

Date

July 1, 2020 02:56 PM MDT

Description

Between long grass and metal shed. Bolted

Photos / Sounds

What

Paradise Spiders Genus Habronattus

Observer

tigerbb

Date

July 1, 2020 02:48 PM MDT

Description

Young juvenile, appeared on stone slab when I laid it down.

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