Two Bridges

All Photos by Carol Tornow, 1/9/12

Look to the left of the middle of the photo above for the rock outcropping. The bridge where SCVN does the panning activity with the public (that's your hint) is to the right. The other bridge is in the bottom right quadrant. The latter is an odd-numbered bridge.

The bridge in the middle of this photos is the same as in the bottom right of the top photo. You can just barely see the panning bridge in the top left of this photo. Answers tomorrow.

Warming up!

Photo by Ned Harris, 1/18/2012

Text from Ned:

During the cold desert night, roadrunners lower their body temperature slightly, going into a slight torpor to conserve energy. To warm itself during the day, the roadrunner exposes dark patches of skin on its back to the sun.

Anne says: Yesterday's bridge was 5 (the first of the WPA bridges). Since you can't see the plaque from above, you'll want to look for the rocky wall to the north.

One more Odd Bridge

Photos by Carol Tornow

Another odd-numbered bridge from above. I'll give you a hint, it's not three. Answer tomorrow.

Rainbow

Photo by Bryna Ben-Asher 1/16/2012

Bryna caught this rainbow in the canyon after the rain on Monday. On her cell phone, no less. Amazing!
Yesterday's bridge is Bridge 1. Note the big boulder on the northwest side, previously concealed by Giant Reed.

Another Odd-Numbered Bridge

Photos by Carol Tornow 1/9/12

A big stand of Giant Reed was cleared from this area (on the 'filled-in' side). Isn't this an idyllic view? This is another odd-numbered bridge. Answer in tomorrow's post.
Yesterday's was Bridge 7. Big thanks to Walt Tornow for "Seventh Heaven" and the other very helpful mnemonics for the bridges.

Bridges from Above: A Quiz Series

Photos by Carol Tornow, 1/9/12

Carol and I hiked the Phoneline trail last week, and Carol was able to get some great shots of a number of the bridges. We discovered that it really is good to know where you are from above! Today's quiz involves an odd-numbered bridge. Note the nice beach. As always, answer in tomorrow's post.

Freeloader

Giant Reed (Arundo donax)

Photos and Text from Mark Hengesbaugh: 

Nothing in Sabino eats or parasitizes the non-native Giant Reed, or Arundo donax, so the leaves stay perfectly formed and intact.

Native acacias host hemiparasitic mistletoe, the phainopeplas who eat mistletoe berries, as well beetles, spiders and a variety of other native species that a healthy ecosystem depends on.  We often hear that “weeds out compete native plants,” but that’s not precisely true. Invasive non-natives like Giant Reed (Arundo donax) go by different rules in their adopted landscape so it’s not a fair contest. Invasives have no predators, parasites or competitors; they use the ecosystem’s water, sun, and nutrients, but lose no energy supporting any of the native bugs, birds or wildlife. Aggressive invasive species like Arundo get a free ride. That’s one of the reasons they spread so quickly—exponentially.

More Ned's Notes (and Photos)

All Photos by Ned Harris 12/22/11

Top two, adult Harris's Hawks

Bottom two, juveniles

Ned's notes from Bill Mannan's presentation "Tucson's Urban Birds of Prey."

• Between 40 and 60 Harris's Hawk breeding groups in metro Tucson. 
• Harris’s Hawks breed every month of the year in the Tucson area.
• In 2003, over 100 Harris’s Hawks were electrocuted. Tucson Electric Power is doing a good job trying to protect them by putting plastic insulation on all poles within 300 meters of known Harris’s Hawk nest sites. Look for plastic insulation atop transformers.

For more photos, check out Ned's flickr site. Bookmark it. You'll be back. 

More about Cooper's Hawks

Photo by Ned Harris

Ned attended the presentation on Tucson's Urban Birds of Prey by U of A Professor Bill Mannan at the Tucson Audubon meeting, and shared his notes with me for the blog. How cool is that?! The following are excerpts from Ned's notes:

• Tucson has the highest density of Cooper’s Hawks found anywhere in the US. Availability of food (doves) and water is the key. 
• There are 200+ breeding pairs in Tucson. 
• Most of the young Cooper's Hawks here are banded; 2500+ Cooper's Hawks have been banded in Tucson since 1994. 
• The number one killer of Cooper's Hawks is window strikes. (Anne notes: One hit our window chasing a dove.)
• Most local Cooper's Hawk nests have 3 young with an average of 1.5 fledglings. (i.e., some of the young die or are killed before they can fledge.) 
• Don't 'rescue' young raptors if you find them on the ground. Leave them alone and their parent(s) will come for them. 
• Report dead raptors and new nest sites to Prof. Mannan. 

Stay tuned for Harris's Harris's Hawk notes in tomorrow's post. 

If you have lecture notes on a Sabino Canyon topic that you'd like to share, please let me know. I'm happy - thrilled, actually - to spread the knowledge around.

A Mesquite Girdler Beetle's Been Here

Photos by Bob Wenrick, 1/11/2012

The Mesquite Girdler Beetle lays her eggs on the 'outside' of the cut (i.e., away from the trunk). That way, the eggs are not washed out, sterilized, or damaged by the sap, which, as you see in these photos, can't make it past the cut. Be sure to click on the link to Margarethe's blog for photos and great info. When you are in the  canyon, look for more evidence of these beetles in the mesquites.

Creek bed

Photo by Ned Harris

This is the road in Sabino Canyon, of course, but it used to be the creek bed. Really. (A long, long, long time ago.) Stand on the road by the entrance/exit to the Esperero Trail and look out of the canyon. You'll see the hills of silt that were formed by the creek when it flowed along this path. Learn about this and other geological wonders by going on the Gneiss Walk, led by Bruce and the Rockettes, every Thursday at 8.30am. Meet in front of the visitor center.

Graythorn

Photos by Matt Ball

I walked by these plants (literally) thousands of times before I noticed them. Thanks to Bob and Fred for letting me know about Graythorn (Zizyphus obtusifolia var. canescens). Now that I know, I see them 'everywhere'. Loads on the Esperero trail before you cross the road. Look at the link for more photos.

Christmas Cactus

Photos by Matt Ball

There's another (very different) plant with the same common name - what I used to think of when I heard it, as my father-in-law grew numerous kinds. Our Desert Christmas Cactus is a type of cholla (Cylindropuntia leptocaulis). The fruits stay on the plant throughout the winter and are the reason for the common name.

Another one in the Sunflower Family

Photos by Matt Ball

This reliable bloomer is another DYC that looks similar to the flowers of Brittlebush and Desert Marigold, at least at first glance. It's called Bahia (Bahia absinthifolia). Look at the leaves in the photos on the linked site; they'll help you identify it.

Fairy Duster

All photos by Matt Ball

Keep an eye out for these beauties! Fairy Dusters (Calliandra eriophylla) are in the Pea Family (Fabaceae), and are some of the first to bloom in the spring; can vary in color from white to nearly red.

Preview of coming attractions?

Photos by Ellen Green, 3/30/2010

Both at Catalina State Park, 3/30/2010

Here's hoping for great spring wildflowers in 2012! Until then, we have Desert Mistletoe (Phoradendron californicum) to look at! Phainopeplas love the berries. 

Name That Plant!

Photo by Ned Harris  1/5/12

Those dark areas in yesterday's photo are alive. Cryptobiotic (aka cryptogamic) soil is composed of life from three kingdoms, in fact. 1) Cyano- and other bacteria; 2) Fungi and Lichens; 3) Mosses and algae. This soil is not only fragile, it also takes a very long time to 'grow'; it's composed of tiny life forms, after all. Bottom line: stay on the trail. 

With the photo above, we'll come back to the first post of 2012. Answer in tomorrow's post. 

Name That Dirt!

Photo by Peggy Wenrick

If you said: "Magnetite" for yesterday's mineral, you are obviously very attractive. Maybe you'll also know what the dark areas in the photo above are called. Bonus points if you know why they shouldn't be walked on. Answer in tomorrow's post.

Name That Mineral!

Photo and Hand, Mary Ball 1/2/2012

If you said: Phainopepla, female for yesterday's bird, you win a handful of this mineral! What is it? (Answer in tomorrow's post.)

Name That Bird!

Photo by Ned Harris

Let's start the year off right - with a quiz! Name and gender of this bird in tomorrow's post.