Wednesday, May 16, 2012

Following the Fairy Lanterns: Globe Tulips at Mitchell Canyon

Place: Mitchell Canyon, Mt. Diablo State Park, Clayton, California.
Dates: May 8th and 12th, 2012

Early May is the flowering season of the Mount Diablo Globe Tulips, or fairy lanterns. This beautiful, shy flower is endemic to Mt. Diablo, meaning, they cannot be seen anywhere else in the world. They grow in Mitchell Canyon area at the north part of Mount Diablo State Park and, being seasonal geophytes, they spend the greater part of the year as a bulb underground.  A few years ago I learned about this flower and every May since then our family have been holding a pilgrimage to Mitchell Canyon to see them in bloom.
This year, our quail family hiked with the Redwood 4H hiking project. Several days before that I went with a friend of mine to explore the trail and prepare for the project hike. The photographs presented here were taken on both dates.

People who have never been to Mitchell Canyon before should keep in mind that there is no car access there from the main area of the park. To get there, one needs to drive through the town of Clayton and enter the park by Mitchell Canyon Road. The entrance is unmanned and visitors who do not hold a state parks membership pass need to self-register (make sure you have a pen in the car), place the fee in a tiny envelope (provided at the gate) and slide it through a very narrow slit (exact change in paper bills is highly recommended).

The staging area has limited parking space, but in all the times I've been there, I never had to park outside. There is a small visitor center that is open on the weekends, flush toilets (in a separate building) and a beautiful, shaded picnic area by the creek. The trailhead is right by the visitor center. It is an interpreted trail - there are numbered stations along the way and the brochures are available by the green cattle gate at the trailhead.

At the trailhead we met some wildlife. Here is a bold ground squirrel:

California Ground Squirrel
and a gopher snake slithered away as we passed:
Gopher snake
The plant community of the Mitchell Canyon area is riparian, meaning the main vegetation grows by the creek's banks. The most common trees there are live oaks, many of which are ridden with mistletoe, a tree parasite.
Mistletoe on an oak tree
Some of the oak trees appear to grow apples-like things. These aren't fruit, of course, but galls: growths caused by another parasite, an oak wasp. The wasp lays her eggs in the developing leaf bud, which is then stimulated to swell by chemicals similar to plant growth hormones secreted by the wasp's larvae. The gall provides the larvae with food and protection until they reach maturity. Old galls are grayish-black and the exit holes of the wasps are often visible.
oak galls
Each gall usually hosts 1-3 wasp larvae.
An opened oak gall with a larva inside. 
Another common tree in Mitchell Canyon is the Coulter pine, which stands out in its blueish-gray hue and its huge pine cones. The Coulter pine grows in the drier parts of California ad Mt. Diablo is as north as it's found.
Coulter pine bearing cones
By the way, if you get the chance to try Coulter pine nuts, by all means, do. They are very very tasty.

Early May is a great time of year in Mitchell Canyon. The creek is flowing nicely and almost everything is in bloom.
The stream

Buckeye tree in bloom:

And here are some of the other flowers we've seen along the trail:

Ithuriel's spear



Our prize, however, waited for us, as usual, by station number 7 of the interpretive trail. That was, of course, the Mt. Diablo globe tulip.  Isn't it gorgeous? 
Mt. Diablo Globe Tulip

This pretty flower belongs to the lily family and is also called Mt. Diablo fairy lantern or Mt. Diablo globe lily in some web sites I've seen. It's scientific name is Calochortus pulchellus
This year we've experienced some crazy weather in the bay area. Perhaps that is why the fairy lanterns seemed smaller than in previous years. 
On the other hand, there seemed to be many, many more of them this year. the entire hillside was dotted yellow. 
Globe tulips on the hillside

After a mile, by station number 9 of the interpretive trail, there is a solitary bench. A perfect spot to have a mid-hike snack. There we took a right turn to White Canyon trail, and almost immediately took another right turn onto the narrow Globe Lily trail. This trail is not marked on the attached map but is well marked in the field. This trail loops back on the hillside, where close relatives of the Mt. Diablo globe tulip can be found:
Mariposa lily (Calochortus venustus)

The hillside is more arid and the prevalent plant community there is the bushy chaparral.
Chaparral on the south-east facing hillside

A member of the chaparral community is visited by a bumblebee:
Yerba Santa (Eriodictyon californicum)

 Chaparral too, can be a multi-story dwelling:
Pipestem clematis (Clematis lasiantha)

At a shady spot at the bend of the trail we saw a colorful patch of flowers: a mixture of red Indian Paintbrush and yellow Mt. Diablo Globe Tulips.

Beautiful view from the the hillside. This is the view to the south. In temperate climates, the north-facing slopes are usually much greener with vegetation as they are less exposed to the drying sun.
A view to the south 

A view to the west:
A view to the west
The globe lily trail is only half a mile long. Too soon it curves downward and meets again the Mitchell Canyon trail. There is a nice, shaded bench there too, at the junction point. On the way back we saw a couple of local lizards:

Lizard on a tree
And another one:
Another lizard 
On the way out I photographed the Clayton quarry, overseeing Mitchell Canyon Road:

Clayton quarry
The entire hike was just about 2 miles long. It took me and my friend, at a slow pace, about two hours, and the group of 4H children (the youngest of which were 5) about 2.5 hours with multiple interpretive stops. We finished the project hike with a lovely picnic and then all the children went down to the creek to dip their feet and paint their faces with the ocher mud. 

Now I need to wait another year to see the fairy lanterns lighting Mitchell Canyon again.

One last word. Mount Diablo State Park, the only state park in the east bay, is under risk of closure due to budget cuts. The park is already understaffed and the few rangers together with volunteer docents keep the place running primarily for us, the east bay folks. So if you are considering places to visit this summer, show your support and visit Mt. Diablo State Park. Lets show our support and save this most majestic place from closure! 

Sunday, May 6, 2012

Low tide at the Hayward Shoreline

Hike date: 4/28/2012
Place: Hayward Regional Shoreline, Hayward, California
Coordinates: 37.62334, -122.13726
Difficulty: very easy

Last Saturday was a beautiful day and after sitting in the house long enough, all of us quails went for a short and highly rewarding hike at the Hayward Shoreline. You can click on the photographs to get a larger view.

If any of you wondered what is the brown building seen from west hy92 right before the toll plaza of San Mateo bridge, it is the Hayward Shoreline Interpretive Center (HSIC), which is part of the Hayward Area Recreation and parks District (H.A.R.D.). At this building is the trailhead of the 7-mile long portion of the S.F. Bay trail, which runs all the way to the San Leandro Marina. Having the little quail chikas in tow we hiked only 0.8 mile out, reached the open bay and returned. Our hike is labeled in yellow on the bottom of the map I downloaded from the EBRPD site.

We arrived the HSIC at about 2:30 pm. It was sunny but very windy. We were glad to have brought our sweatshirts. The tide was at its lowest I've ever seen there, and all the mud flats were exposed and marked with numerous tracks. Birds, mostly, but other animals too.
Snake tracks
Rabbit tracks

We entered the HSIC and spent some time inside. The HSIC has a lovely exhibit room with several tanks housing a variety of bay fish, crustaceans and molluscs, including small sharks whose feeding times are public events. There weren't many people there at the time we were ther so the little chikas got the full attention of the naturalist, who brought out a gopher snake for them to hold and admire. The center's objective is the education of people about the bay shoreline habitats and the importance of keeping the bay and its shores clean of pollution and refuse. Many of their programs are for families and are very much focused on the education of children. School field trips to the HSIC are a wonderful opportunity to expose children to these wonderful programs of environmental education.

On the beams extending from the brown HSIC building there were Barn Swallows perching, or flying about, busy catching insects or carrying mud to build their nests.
Barn swallow
The shallow water and the muddy slough banks are a haven for wading birds. This cute sandpiper was wading right outside the building:

Least Sandpiper
The trail is gravel-packed and wide, and is very popular among bikers. The slough stretches along the path all the way to the bay. Man-made passages connect the array of sloughs and ponds in the entire area and control the flooding. This is how some areas appear full while others right next to them at the same height appear empty. The muddy banks of this slough were completely exposed in the low tide and only a small trickle of water run in the middle. 

The areas that have been exposed for a while were crusted and cracked:

The whole area is flat with no land features to break the wind. The vegetation consists of low shrubs and annuals, all salt-resistant. One of the most common shrubs in this habitat is the pickleweed, which is, in fact, edible. Here is a cute little sparrow perching on the pickleweed:
A song sparrow
All along the path we saw Forster's Terns flying about and heard their high-pitched cries. 
Forster's Tern
after 0.8 miles we reached the bay. Just before the open water the trail transverses the slough over a flat bridge:

This simple, plain bridge functions also as a scaffold for cliff swallows building their mud nests right under it:

Cliff Swallows building their mud nests
Another view of a swallow in flight:

A close-up on a couple of nests on one of the bridge posts:

Just before the slough reaches the bay it widens into a small pond that provides a foraging and resting place for a number of bird species. In that one little pond I saw a great egret, a cormorant, a couple of mallards, a curlew, and two Forster's terns that came to rest on a bar over the pond.

On the other side of the slough was a larger, shallow pond where quite a few sandpipers waded about with their bills in the water.

Despite it being spring time, I saw little variety of blooming plants and of those, the yellow was definitely dominant. The mustard,  which is an invasive species, creates bright yellow mats all over the land areas.

And I also saw this tiny composite flower, so low that it's barely detectable:

At the bay we turned around and headed back. The tide was coming in and the slough was filling with water once again.

On the horizon, Mount Diablo is visible (beyond the new power station construction site)

And just before returning to the HSIC we saw a male mallard warming in the sun. As we passed it, it jumped into the water with annoyed quacks.
A sitting duck
The complete hike, 1.6 miles total, took us (at a very slow pace) about an hour, I strongly recommend this place for nice family walks. The HSIC building is open to the public on weekends. We went inside for some more time after the hike and the elder chika drew a blue heron on the chalkboard table they have inside. I suspect she'll be a bird watcher just like her dad :-)