adventures in nature

bird

a bald and white Christmas in PA

Yes, Christmas will always be bald and white for me with regard to one definition of those terms at this point in my life, but this particular Christmas we were treated to other, more fun benefactors of those descriptors –  a snowy Christmas eve yielded a white Christmas morning, and we got quite a show by some local nesting bald eagles.

adult bald eagle 01

adult bald eagle 01

These are presumably the same birds that have been nesting at this site for the past few years not far from my parent’s house in PA (see my post from last year here). It’s great to see them still successfully using this nest as it is more exposed and closer to human activity than most nests. This is actually a GOOD thing, as it indicates that most of the other more ideal nesting spots and territories around the Susquehanna River are already taken by breeding pairs.

adult bald eagle 02

adult bald eagle 02

adult bald eagle 03

adult bald eagle 03

The snow also allowed us to see who was using the landscape … snow tracks! It’s far from wilderness here, but this beautiful agricultural area still has quite a bit of wildlife that manages to survive in an area that continues to have more and more human development replace farms and forests. We were still able to find the tracks in the nearly melted snow of white-tailed deer, cottontail rabbit, and two red fox – and ultimately I was able to find what I think is the red fox den! A couple of red-tailed hawks were hunting in the cold air above us, and we spooked a coopers hawk with a meal from its perch in a grove of fir trees.

red fox tracks

red fox tracks

red fox den

red fox den


los vaqueros reservoir

I haven’t been lucky enough to see a jaguar in the wild yet, but I did see this fella (lady?) last Thursday at Los Vaqueros Reservoir in Contra Costa County just after sunset.

bobcat

bobcat

Hiding just out of sight was this little one, probably trying to avoid being a bobcat breakfast.

brush rabbit

brush rabbit

It is a surreal landscape here – large mountainous hills that grow out of the flat grassy planes East of Mount Diablo, south of the Sacramento-San Joaquin river delta. It is almost completely devoid of trees, other than a small riparian area at the dam outlet, but once atop any of the peaks that surround the reservoir, there must be thousands of giant wind turbines in sight. It’s staggering the number of turbines in view, for as far as the eye can see in some directions, over land that has been cleared for grazing.

Los Vaqueros Reservoir

out in “nature” – Los Vaqueros Reservoir and a small portion of the visible wind turbines

Ironically, this general area has the highest concentration of nesting golden eagles in the world. It is home to many raptor and bird species, and has also been shown to be a main migration route for birds in the Autumn and Spring. It probably goes without saying that wind turbines and soaring birds don’t go well together (not for the birds, certainly). The mortality rate of golden eagles in this region is high due to collisions with the wind turbine blades, and is probably under-reported.

golden eagle / Mount Diablo Nov 2011

golden eagle / Mount Diablo Nov 2011

It’s hard to determine visually where the wind farms end or if they are part of different farms – to the north is the Shiloh Wind Power Plant, and to the south is Altamont Pass Wind Farm (of notorious history, for its vastly negative impact on raptor and other bird species). They are two of the four largest wind farms in CA. I’m not sure who owns the ones pictured above, I suspect it’s part of the Altamont Pass Wind Farm. The picture below shows a view to the north from above the reservoir – if you look closely you can see a LARGE number of turbines stretching across the horizon. I suspect these are part of Shiloh Wind Power Plant. It’s hard to differentiate where they start or end though because the turbines seem to be concentrated densely there to the north, then they sporadically  run from that point far to the north all along the eastern edge of the Diablo range, then southeast towards Altamont Pass and out of sight.

distant wind turbines

distant wind turbines

Despite the jarring visual impact, these turbines are “green energy” and certainly have a lot of benefits over other energy production techniques. They are part of the compromise that we currently must make in our effort to satisfy energy demands while still attempting to minimize our impact on the environment – both to the creatures who live there now, and in a global capacity long term. No easy answers. No black and white.

Every day the sun rises though, and the cycle of life continues. Coyote doesn’t care so much about politics.

coyote tracks

coyote tracks

hunting bobcat

a hunting bobcat after sunset


free!!

Haya was released successfully on Monday, it was quite a day.

Good luck Haya!!!

Haya 1

Haya 1

the toss!

the toss to freedom!

Haya 2

Haya 2


dark morph extravaganza

Lot’s o dark morphs lately! Delicious.

The rains have passed and the light was perfect for a few more shots of the intermediate/dark morph in Berkeley …


day of the dark morphs

We saw a dark morph ferruginous hawk in Sonoma County the other week (!!), it’s been hanging around with a light morph ferruginous hawk in an area that also has at least one dark morph red-tailed hawk (probably the one that I photographed and posted here from last year).  A rare treat in Sonoma County to see ferruginous hawks of any plumage – the largest hawk native to the United States.

dark morph ferruginous hawk / Sonoma County CA

dark morph ferruginous hawk / Sonoma County CA

dark morph ferruginous hawk / Sonoma County CA

dark morph ferruginous hawk / Sonoma County CA

dark morph ferruginous hawk / Sonoma County CA

dark morph red-tailed hawk / Sonoma County CA

white-tailed kite / Sonoma County CA


back in the skies!

Happy news for our falcon friend from Oakland that was shot along with two of her fledglings a little over a year ago (see link and link) – she is scheduled to be released back into the skies! Whatever destiny is hers to follow, it will be on her own wings and flying free. Good luck Haya! Many many thanks to all the people who worked so hard to make her release possible.

From the Lindsay Wildlife Museum’s Facebook page (link):

“After spending a year and a half in care and going through three surgeries, a bone infection, countless radiographs and anesthesia, broken feathers and falconry training, it is with great pride that we announce that Haya has been evaluated

and will be released! We are hoping to release her in the next couple of weeks. Be sure to sign up for our release program for an opportunity to see her return to the wild!http://wildlife-museum.org/hospital/releasesThis has been a long and incredible journey for this falcon as well as for those caring for her. We would like to extend our deepest gratitude to all of you who have been following her progress. Without your constant support we would not be able to help animals like Haya return to their wild lives.”

Her one surviving offspring, a huge female falcon named Marina, is unable to be released and will spend the rest of her life in captivity (and I seem to recall that she is being used as a surrogate mother for captive breeding ).

I took this picture the evening before she was shot – she was feisty as ever, yelling at some of the bridge workers (for whom she had developed a distaste, since they had escorted bird banders weeks prior up to her nest to band her fledglings – she always recognized their uniforms and was proactive in “defending” her nest area after that intrusion).

Haya May 31, 2012


intermediate morph red-tailed hawk

rufous morph red-tailed hawk in flight / Berkeley CA

In drastic contrast to the “spirit” red-tailed hawk in the last post, I found this fella hunting here in Berkeley. Red-tailed hawks are one of the most “polymorphic” hawks, meaning they show a large variety of individual plumage within the species. This one is a “rufous” or “intermediate” morph (in contrast to light morph, dark morph, or leucistic) – it’s entire body is dark brown – with a bit of a rufous or gold hue on his chest feathers – and its underwing coverts are dark as well (in contract to the flight feathers which are still white with dark banding). These are found more commonly here in the Western U.S., and I always am especially thrilled to see one as they are somewhat rare. And beautiful.

The lighting wasn’t so good because the sun had already set behind some clouds/fog to the West. But you get the idea.

rufous morph red-tailed hawk / Berkeley CA

intermediate morph red-tailed hawk / Berkeley CA

rufous morph red-tailed hawk in flight / Berkeley CA

intermediate morph red-tailed hawk in flight / Berkeley CA

For some other pictures of a dark/intermediate morph red-tailed hawk, see my other post here.

As I was biking home after the sunset, I was stumbled on a lone great egret looking for a last fish before dark. It was chased off while I watched, by a heron that swooped in almost on top it, squawking like how I imagine a pterodactyl must have sounded. The whole scene was prehistoric and awkward, with both the birds gangling wings and legs flailing about, finally leaving me in the relative silence of twilight between worlds … and between the Berkeley Aquatic Park and Route 880/580 during rush hour!

great egret / Berkeley CA

great egret / Berkeley CA


partial leucistic red-tailed hawk

partial leucistic red-tailed hawk

(the following picture was added after the original post)

partial leucistic red-tailed hawk

partial leucistic red-tailed hawk

partially leucistic red-tailed hawk 01 / Sonoma County CA

partial leucistic red-tailed hawk 01 / Sonoma County CA

Thanks to a tip from Larry “the raptor magnet” Broderick of West County Hawk Watch, I was able to see another amazing bird yesterday. Leucism is a recessive gene defect that affects the pigment cells’ development in some parts or an entire animal, causing either the whole animal or some of its feathers, fur, hair or skin to be white. It’s similar to (but different than) albinism, which only affects the melanin pigment cells. The effect can be really cool to see, as it is in this red-tailed hawk that I photographed in Sonoma County yesterday.

partially leucistic red-tailed hawk 02 / Sonoma County CA

partial leucistic red-tailed hawk 02 / Sonoma County CA

Viewing the bird from the front or from underneath, it’s difficult to tell that it has different plumage than a typical red-tailed hawk, though on close inspection of it flying from underneath, you can see a couple of flight feathers that are all white. From a rear or top-down view while flying, it is obvious (and not easy to photograph!! I forgot to bring my jet pack yesterday).

partially leucistic red-tailed hawk 03 / Sonoma County CA

partial leucistic red-tailed hawk 03 / Sonoma County CA

partially leucistic red-tailed hawk 04 / Sonoma County CA

partially leucistic red-tailed hawk 04 / Sonoma County CA

partially leucistic red-tailed hawk 05 / Sonoma County CA

partially leucistic red-tailed hawk 05 / Sonoma County CA

partially leucistic red-tailed hawk 06 / Sonoma County CA

partially leucistic red-tailed hawk 06 / Sonoma County CA

partially leucistic red-tailed hawk 07 / Sonoma County CA

partially leucistic red-tailed hawk 07 / Sonoma County CA

A bald eagle that I photographed last winter also has leucism, and it was striking. See those posts with pictures again here.

Another local raptor expert, George Eade, photographed an almost completely white red-tailed hawk here in the Bay Area a few years ago, his pictures can be seen here. The bird and the pictures are absolutely amazing.


a few more eagle snaps

hatch year bald eagle 01 / New Fork River WY

hatch year bald eagle tail feathers / New Fork River WY

hatch year bald eagle 02 / New Fork River WY

hatch year bald eagle talons / New Fork River WY

hatch year bald eagle 03 / New Fork River WY

hatch year bald eagle wing / New Fork River WY


bald eagle trapping

bald eagle release 03 / New Fork River WY

Last week before I left Wyoming, I was fortunate enough to get out in the field with Brian Bedrosian, who is the Avian Program Director at Craighead-Beringia South. The task at hand was to catch a bald eagle, the last push to  get the final of six transmitters attached to local bald eagles in the Upper Green River / New Fork River drainages, for a research project that is studying the effects of local energy extraction development on wildlife (aka gas wells aka fracking sights). For more on the details, see here.

Brian and Chief / New Fork River WY

Brian and Chief / New Fork River WY

We spent  10 hours on the New Fork  River on Wednesday, rowing down the low and slow water with Chief, Brian’s dog, directing us.

To the East are the jagged peaks of the Windy Mountain Range, poking above the horizon eerily in the forest fire haze, and they look similar to the drastic edges and slopes found in the Teton Range. Meandering back and forth through the dry high-desert landscape is the New Fork River, a lush riparian zone that is home to many plants and animals, and a literal oasis.Everywhere else around us, as far as the eye can see, are sage-covered hills, slopes and small mesas – a sight which resembles a snapshot from the ocean, just beyond the breakers where the surface of the water is starting to peak and trough into rolling, moving hills of water.

And, also as far as the eye can see, are natural gas extraction pads. So it is that this area is the center of much debate and ecological concern.

pronghorn antelope / Sublette County WY

pronghorn antelope / Sublette County WY

natural gas extraction pads / Sublette County WY

natural gas extraction pads / Sublette County WY

We went through three separate bald eagle nesting areas during the float, using a trapping technique called a “float fish.” As we approached a nesting site, and there were eagles perched, we placed in the water upstream of us one or two of the float fish traps, then paddled quickly downstream ahead of them. These traps are essentially fresh-caught trout that have been modified with nooses of fishing wire and attached to a floating log with a few feet between the two. The concept is that when the eagle grabs the fish, the nooses secure around the eagle’s talons. The log is light enough that the bird can fly or swim safely to shore while we make our way back to grab it. Unfortunately the day yielded no results for our primary purpose (bald eagles trapped = 0), but it was a beautiful day to spend on a river. When your “work” entails floating and paddling down a river in August in Wyoming, life is good.

The next morning, we took a different tactic and instead of floating down the river, we selected two known bald eagle perch sites that were accessible by foot. We readied traps early in the morning – with Trapper Haynam joining us, also from Craighead-Beringia South – and before sunrise set them floating in the river below two separate eagle perch sites. After setting the traps we monitored them from not far away, above the river banks.

We then prepared for a long wait.

Suddenly, at 6:20 am, not 20 minutes after we had climbed back up the steep banks of the river to wait in the truck, an adult bald eagle soared over the fish and landed right by it! It seemed to toy with the fish and our emotions for a few moments, then after some careful scrutiny it took off. We hadn’t fooled it. Shortly thereafter a juvenile bald eagle came and circled above the fish a few times, then it was chased off by the resident adults who then perched upstream. It did not look promising.

Now the real waiting began. We had no eagle action after the initial excitement, but we did have several bull moose move through the area, including one who seemed to walk directly over the fish trap. I was worried that maybe we suddenly discovered a mutant carnivorous zombie moose and that we would have to free it from the fishing cord after it tried to eat our fish, but luckily it was the regular non-zombie, plant eating variety.

float fish trap

float fish trap

bull moose / New Fork River WY

bull moose / New Fork River WY

perched bald eagles at sunrise / New Fork River WY

perched bald eagles at sunrise / New Fork River WY

We decided that our setup was probably not going to attract any further attention from the eagle family, so we retrieved the trap and went to meet up with the rest of our crew at the other trap site that seemed to still hold some promise. The eagles hadn’t seen the fish yet but were in the area, and they had two of their young in the trees around them begging for food. My time there was limited as I had a long drive to do before the day was over, and just as I was about to leave for my drive back to California, we got one!

bald eagle capture 01 / New Fork River WY

bald eagle capture 01 / New Fork River WY

bald eagle capture 02 / New Fork River WY

bald eagle capture 02 / New Fork River WY

A hatch year bald eagle went for the fish, and although an adult was the preferred target, it could still be tagged for the study. Things happened VERY fast. We were posted up on a bluff above the river to monitor the trap, so when the bird hit it, we immediately drove down to the river bank, jumped out and ran to get close to it, before approaching the last bit of distance slowly and carefully. First priority was safety of the bird and us, and we didn’t want to create more stress than it was already experiencing. Brian handled it with amazing skill and professionalism. It had grabbed the fish, then when it realized it was caught, it flew/walked/swam over to a gravel bar in the shallow river where it was sitting when we got there.

To minimize stress (for the bird and us!), a falconers hood is placed over the head of the bird. This is also a common technique used in bird rescue and rehabilitation, and during exams of captive birds, because most birds tend to go into a hypnotized state of calm once the hood is over its eyes. The exam and attachment of the transmitter went quickly and smoothly.

bald eagle exam 01 / New Fork River WY

bald eagle exam 01 / New Fork River WY

bald eagle exam 02 / New Fork River WY

bald eagle exam 02 / New Fork River WY

After feeding the eagle some trout and giving it some water to be sure it was hydrated after its ordeal, we released the eagle back onto the river. After the hood was removed and it was placed on the ground, it took a few seconds for it to get its bearings, then it flapped its gigantic wings and turned east, getting over a fence and landing in a stand of trees upriver. Mission accomplished.

bald eagle release 01 / New Fork River WY

bald eagle release 01 / New Fork River WY

bald eagle release 02 / New Fork River WY

bald eagle release 02 / New Fork River WY

I must say that I had a lot of mixed feelings about capturing the bird, and about putting a transmitter on it, as the device is attached by strapping it around its body, and it sits on its back like a very small backpack. I find some solace in knowing that professionals like Brian are executing trapping like this in a professional manner and minimizing stress for the birds, and that these birds are participating in studies that could help the lives of many of their kind in the future. Your sacrifice does not go unnoticed.

bald eagle release 03 / New Fork River WY

bald eagle release 03 / New Fork River WY

The visual and auditory impact alone of the gas pads is tremendous on the landscape. The night that we slept there amid them all on BLM land near the river, the remote area looked like it was covered with lots of small towns due to the number of lights. It wasn’t until morning that I realized most of these “towns” were drilling pads, with a few ranches interspersed. During the night, loud explosions occurred with regularity. Many people in the area believe that these extraction processes could be poisoning their air and water. The ethics and methods surrounding energy extraction are hot topics right now, and the long-term impacts on humans and the greater ecosystem have yet to be determined – but I know that I am certainly concerned. Nothing comes without a cost. I urge everyone to educate themselves about this issue and the next time you fill up your gas tank or turn on your stove, take a second to think about where your energy is coming from. And be thankful for it.

Good luck my eagle friend, I look forward to thinking of you and your kind flying free over clean waters for many generations to come.

bald eagle release 05 / New Fork River WY

bald eagle release 05 / New Fork River WY