Bob and His Gap

Wallace's woolly daisy, Eriophyllum wallacei.

I was out with Wanda Dameron this morning to check out some birding spots at a place called Bob's Gap. As someone interested in nature I couldn't avoid hearing this name before. Not only is it well birded, but there are great butterflies occurring along this stretch too. Bob's Gap could refer to two areas; the first is Bob's Gap Road, which extends all along this section of the desert. The second is Bob's Gap itself, a canyon of sorts along the eastern corner of said road before it turns straight northwest. I had a few hopefuls today, namely birds like Scott's oriole! New birds are harder to find once you've been in a country for a while, but some of the desert species such as Mr. vividly yellow and black oriole was one of those I had not come across yet.

They always say some of the most interesting finds are when you are a man disappearing off trail to pee behind a bush. This was no exception, I mean, just look at this!!

Desert calico, Loeseliastrum matthewsii!!

The incredible desert calico is not uncommon in this area, but seeing it for the first time is an irreplaceable experience! And this one was piss easy to find too! (I'm sorry). What isn't piss easy though is remembering that scientific name. Sorry Matthew, I can only commemorate you in text form. 

This segment of Bob's Gap Road spot also held Wallace's woolly daisy, Mojave aster, and yellow turbans. While leaning over to photograph one such yellow turbans I noticed a small blue butterfly caterpillar nestled in the branches. Based on research this is almost certainly the caterpillar of the endangered Mojave dotted-blue, a desert lycaenid whose cats are specific to this buckwheat species. There are no photographs or descriptions of this caterpillar anywhere, but it sure doesn't look like any other caterpillars that are already documented! It is the perfect yellow colour for blending in with those yellow turban flowers. 

On the flip side, I was so distracted with this caterpillar that I forgot to properly photograph the yellow turbans itself. Another time, perhaps.

Probable cat of Mojave dotted-blue, Euphilotes mojave!

Later down the road we stopped by a strand of junipers to check around for Scott's oriole and other desert birds. With no success we headed back to the car. Back there I played the oriole song on my iPhone to ensure I knew what to listen for. The song is distinctly reminiscent of the other orioles I've encountered, but a little more cheerful. It was unlikely that I'd overlook such a distinctive song, especially not one that I've heard in the field before, but I wanted to be sure! I then put my phone away but, as I did, the song played again. I pulled out my phone to stop the recording from looping multiple times, but then I realized that my phone was off, and it was not playing at all. So then where did that oriole song come from!?

I hiked back into the bushes where the sound came from, and as if by magic, the vivid yellow and black glory of a male Scott's oriole gazed down at me from a juniper. I raised my camera and...wait, where did he go!? Bloody hell.

With a bit of stalking I eventually refound him, and his olive-infused mate, just in time for the sun to beam down...

Scott's oriole, Icterus parisorum!!

Scott's oriole, Icterus parisorum.

The female was carrying nesting material, and the two birds were somewhat circling in the vicinity of a particular tree, so I expect there was a nest present. At that note I took my leave, not wanting to disturb them. I was anxious that, after seeing my first Scott's oriole, I'd return home with a rubbish photo featuring the most obscure blur of yellow possible. Delighted to say that isn't the case! Oh yes, and here is Dorr's sage. The light indigo flowers themselves are very appealing, but the bush itself is not very splendid, thus it is easily walked past:

What Dorr's sage looks like up close, Salvia dorrii.

What Dorr's sage looks like to the naked eye, Salvia dorrii.

At Bob's Gap itself I was first introduced to some interesting architecture. I'm assuming this has relevance with the origin of the name Bob's Gap, but there is not much information online:

Structures at Bob's Gap.

In this area I found the rarely documented dome cryptantha, white-stem stickleaf, fringed onion, longspine horsebush, Mexican bladder sage (AKA paperbag bush), and, to my surprise, Cithara buckwheat! I earlier searched for this uncommon native plant at Malibu Creek State Park. It is very similar to Davidson's buckwheat, only really differing in the apparent tendency to display outward instead of upright branches, and habit of growing solitary instead of in clusters (I could be wrong in my choice). 

Along the roadside I revisited a group of Prince's plume that I noticed on the drive in, a very showy native mustard with tall yellow inflorescence. Besides the individual flowers themselves, you'd never guess this was a mustard.

Dome cryptantha, Cryptantha similis.

Longspine horsebush, Tetradymia axillaris.

putative Cithara buckwheat, Eriogonum cithariforme.

putative Cithara buckwheat, Eriogonum cithariforme. Some of these
flowers were very large (for a buckwheat).

Prince's plume, Stanleya pinnata.

With time falling, we packed up here and retraced our steps down Bob's Gap Road. On the south-facing portion of the road I noticed what looked like red poppies along the roadside. My thought was that this was an escaped population of one of the English or Oriental poppies. However on closer inspection I couldn't have been more wrong. No instead they were something I didn't expect to find at all, desert mariposa lily! This incredible plant was scattered all down this section of the road. While photographing these I heard what sounded like a downy woodpecker calling from junipers. But, given the open desert habitat, I had another woodpecker in mind. Eventually the bird showed itself, and there was no mistaking that it was a ladder-backed woodpecker, one of the desert specialties. It was not the closest showing bird in the world but the views were very reasonable.

Desert mariposa lily, Calochortus kennedyi var. kennedyi.

Ladder-backed woodpecker, Picoides scalaris.

With that success, we moved on to Big Rock Creek to search for American dipper. There was evidence of the bird in the form of round white "splats" on the rocks, but the bird itself was not to be seen. The lush willows here gave me three new galls Rabdophaga salicisbatus, R. rigidae, and R. salicisbrassicoides, so that was interesting! R. salicisbatus in particular was interesting as it doesn't seem to have been photographed before. This midge species forms a bright red bulge on the stem, which then serves as protection for the larvae to mature.

Willow rosette gall, Rabdophaga salicisbrassicoides.

On nearby cottonwoods there were some odd galls on the leaf stalks (=petioles) which I could not recognize as the work of either a midge or wasp. When I opened one several aphids spilled out, and I had my answer. With some work I determined them to be poplar leaf-base galls, caused by the aphid Pemiphgus populicaulis. There are two closely related species on cottonwoods, this one forms the gall at the end of the leaf stem just below the leaf itself, while the other, populitransversus, forms the gall halfway along the leaf stem (hence "transversus", I suppose). A pleasant little creek down the road was actually a bit more than that, perhaps a brook, or even a rivulet. Along with the lush green vegetation this spot was oddly reminiscent of a stream in England! Here I found two new plants, ditch beard grass, and fragile-sheathed sedge. both adjacent to the riverside.

We checked several other promising locations but still no dipper. On one spot I noticed an odd maple, which I later determined to be silver maple. This plant is not native to the western side of North America, but has several records in this region. The next interesting find was at South Fork Campground where I encountered a solitary cluster of longstalk phacelia. On this same hike I saw Transverse Ranges liveforever (Dudleya cymosa ssp. pumila). If you know me well you know I am fascinated by Dudleyas, and while I have seen D. cymosa before this subspecies was new to me. This subspecies is smaller than most, hence "pumila" I suppose.

Longstalk phacelia, Phacelia longipes.

Transverse Ranges liveforever, Dudleya cymosa ssp. pumila.

On the drive out of the campground I stopped by to photograph a pale looking form of sticky monkeyflower. This plant is usually orange but the intensity of the orange depends on location. Adjacent to that I found a morning glory, which as it turns out is the very rare Peirson's morning glory! On the outlook this morning glory does not look any different to the other common species, except that the leaves are a little more Y-shaped, and the bracts supporting the white flowers are short and indented at the tip. A great plant to stumble upon by accident! It is endemic to this region and occurs nowhere else in the world.

Peirson's morning glory, Calystegia peirsonii.

Pierson's morning glory, showing the indented bracts at the base of the
flower, a trait which diagnoses this rare species.

We ended the day at St. Andrew's Abbey, where there was a lot to see but nothing new. That is, except for an invasive colony of Brazilian waterweed infesting a pond here. Well, a tick's a tick!

Brazilian waterweed, Egeria densa.

Thanks again Wanda for the great day out!

Malibu Creek Wanderings

Greater periwinkle, Vinca major.

Today I had a few targets in mind. My first goal was to check a section of the Backbone Trail running through riparian, where someone had recently reported a nemesis species of mine, American yellowrocket, a fairly uncommon species here that only grows in certain damp, shady locations near creeks. Fortunately that was also fairly close to the Tapia Spur trail at Malibu Creek State Park, where the cool Cithara buckwheat is said to grow. I had never visited either of these two spots before so I knew there was going to a lot of cool habitat to look forward to!

Beside the car I noted the unfortunately ubiquitous greater periwinkle, a nice looking garden plant but one that rapidly spreads and infests riparian habitats. This was though the first time I've seen them in flower. One patch was covered in a a powdery white mildew, which I determined is almost definitely Golovinomyces orontii, a species specific to this plant. A great start to the day was seeing black cottonwood growing in the valley along Piuma Road, where this portion of the Backbone Trail begins. The leaves of these trees are much darker than other cottonwoods, hence the vernacular, and it is a very localized species in the Santa Monicas. The western spotless ladybug (Cycloneda polita) was actually quite common here, and this was the first time I had seen adults. I sweep-netted the larva of this native species in my neighbourhood several years back. In our area it has a very erratic and uncommon distribution, although it is quite common further north.

Golovinomyces orontii on Vinca major.

Black cottonwood, Populus trichocarpa.

At one point the trail disappears and turns into a car park for the California Wildlife Center! It took me a few moments to find the continuation, but as soon as I did, I was greeted with the yellow flowers of the native mustard, American yellowrocket. Success! On nearby California ash I scoped out some unfamiliar lichens, and with some outside help was able to identify one as a very likely candidate for Lecanora circumborealis. thanks to the substrate (bark) and black apothecia. The common name of this lichen is usually black-eyed rim lichen, and indeed it is one of the few species in the genus with dark apothecia.

American yellowrocket, Barbarea ootheceras.

Lecanora circumborealis on Fraxinus dipetala.

I continued a little further up the path to see what was about, and I bumped into two sprigs of silver wattle, Acacia dealbata. Apparently this is a known establishment of this Australian tree which the NPS have tried time and time again to eradicate. Some of the feathery leaves were infected by armoured scale insects in the family Diaspididae. If only it were possible to identify those!

Silver wattle, Acacia dealbata.

Thoroughly aware of time, I headed back and along Piuma Road, on route to the Tapia Spur trail. On the way I found Cretan mallow, one of a few similar non-native species, but distinctive in seed morphology as well as the very large flowers and upright growth.

Cretan mallow, Malva pseudolavatera.

On Tapia Spur itself, once I found the right timing to sneak past the entry rangers  (just kidding!), I stumbled across a darkling beetle that I had been seeking for a while, Coelocnemis magna. Unlike the more common Eleodes the beetles in this genus have golden hairs under the legs, and are a little stouter in proportions overall.

Coelocnemis magna.

The golden hairs of Coleocnemis magna.

Unfortunately I could not find the Cithara buckwheat, but the rocky talus slopes along the trail were interesting. On one corner I found lesser chickweed, a nondescript green plant that gave me a lot of hassle when it came to identification. These plants were as "in flower" as they were going to get, with no visible petals or anything you'd associate with a flower at all. I heard a field cricket singing nearby and picked apart the rocks until it jumped out. With a recording and images in hand I dropped an email by David Weissman who confirmed this was the undescribed species Gryllus sp. "rock chirper". As cool as it was finding a species effectively new to science it is not actually that rare in California. Before finding this cricket though I unearthed some terrifyingly large spiders that jumped out and skittered away with amazing speed. These spiders were eerily reminiscent of the good ol' hunstman spiders from Australia; lo and behold Curicaberis peninsulans is more than just reminiscent of those nightmarish creatures, it is one!

Lesser chickweed, Stellaria pallida, bearing the most flowery
looking flowers you can expect to find in this species! Note that the
green "petals" are actually sepals, the part of a flower that supports the
petals...if it had any!

Undescribed Gryllus sp. "rock chirper"

The terror that is Curicaberis peninsulans!

Birding the City of Angels

Battarea phalloides.

Usually I have a crazy extravagant trip proposal for my birthday, however there wasn't much availability this time around so instead I took Dan Cooper's offer of dropping by Griffith Park for the organized Los Angeles CBC meeting. It was great to finally see yellow-chevroned parakeet albeit as tiny smudges well up in the tree, completely obscured by branches. One of the coolest finds though was this native puffball, Battarea phalloides! Non-lichenized fungi are not too common in drought-stricken Los Angeles, so it is always a novelty to find one.

The real star of Griffith Park though was the barred umber splendour that was a female Williamson's sapsucker foraging along aleppo pines! A real high-elevation specialty that is not the most expected down in the LA basin. Not long after a brown creeper showed up! Wow, another great mountain species together on the same tree! Phenomenal. I also saw my first merlin...subspecies. What subspecies is it along this coast anyway? It is much darker than the grey and pale brown ones I grew up with in Europe.

The sapsucker didn't want to show itself in the sun but ah well, I can always find something to complain about so let's not go that route!

Williamson's sapsucker, Sphyrapicus thyroideus,

Later on we checked out Bronson Canyon where I saw my first of Australian waterbuttons. Later that evening I heard Lance Benner had northern saw-whet owl at this location! An incredible bird and not expected this low down. Today seems to be the day of unexpected mountain specialties!

Oh, and I guess I should mention two other new weeds I saw in rural Sullivan Canyon. First nasturtium, and then the highly invasive cape ivy (that is, Delairea odorata, the real cape ivy, and not the other species under this common name!). Cape ivy is nice to look at in full bloom, but it completely blankets everything and chokes out anything else that wants to live there.

Cape ivy, Delairea odorata.

Thanks Dan for the heads up and the lift! Some good species that day.