adventures in nature

Posts tagged “great-horned owl

20161025 juv owls and venus

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juvenile great horned owls and venus in background at sunset / contra costa county CA

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20161025 juv owl flying

a74a4991-v1-2juvenile great horned owl / contra costa county CA


20161021 great horned owl juveniles I

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right on queue, these two juvenile great horned owls have been haunting the woods nearby with their haunting cries of dispair (aka annoying hunger begging cries to their parents) … almost Halloween / Samhain / Dia de Muertos!

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20161013 calm before the storm

a74a4931-v1-2juvenile Great-Horned Owl / Wildcat Canyon Regional Park * Richmond, CA

a74a4957-v1-2almost-full-Moon and Red-Tailed Hawk hunting late / Wildcat Canyon Regional Park * Richmond, CA

Probably the last of this waxing moon we’ll see this month, due to the coming storm. Beautiful night.


owl

when you see this wild eye, it can’t be anything else but what it is … and it is beautiful

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great-horned owl (adult female) / contra costa county CA

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last nap before the night

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This pair has been around for a number of years – why no young? Theories to come …

 


the ravens and the bobcat

After a day of what could be the last rain of the season, I decided to motivate myself for a much needed attitude adjustment. I was grumpy, and pretty unmotivated. I knew if I went out for a wander/hike, things might shift. I figured “future Zach” might really appreciate “past Zach” more if “current Zach” got off the couch.

It was just before sunset, and the clouds were starting to break up, yielding some blue sky and a beautiful setting sun sometimes shining from behind the clouds. The puffy clouds that were left after the rain were now highlighted in beautiful pinks, purples, and oranges. The air was calm and there was a divine serene quality to the light and the moment.

I wasn’t far into my wander when I heard a lot of raven sounds. It’s not unusal to see them in this area, but usually they are moving around, soaring, and don’t typically hang around one particular area for too long. And usually they are in pairs here. As I turned a bend, I started to see them. Some were flying, some were perched or hopping around a grove of eucalyptus trees. There were at least four or five ravens, and I stopped to watch and listen. At first I thought perhaps it was a young family of newly fledged ravens, just playing on the hillside and in the grove of trees. They didn’t necesarily seem focused on anything in particular, but I decided to circle around to the other side of the eucs to get a better look.

Sidebar …

I’ve written before that in the northern part of Wildcat Canyon Regional Park, I have never seen definitive bobcat sign nor a live bobcat in the three years that I have been going there (ironic, given its name!!). My explanation was that due to the open grassland and minimal cover in this area (most of it is grazed by cattle for fire suppression), coyotes are the dominate predator because they can adapt to the terrain better. Between the lack of cover and proliferation of coyotes, it is not ideal bobcat terrain. Not only that, many people walk their dogs in this area, and again, coyotes are better equipped to deal with that scenario. Bobcats like to be near edges of vegetation, so they can easily “disappear” to escape threats. Further south in Wildcat Canyon, there are more chapparal and riparian zones with lots of cover, and sure enough I’ve found (and seen) bobcats and their sign there.

That all changed a few months ago. I was out after dark in the northern part of Wildcat and somehow in the dim light I spotted a single cat track in a patch of mud on a lightly used cow trail in an area under eucalytus trees and close to more dense cover (other trees, poison oak, blackberry, coyote brush, etc).

bobcat track / Wildcat Canyon Regional Park Richmond, CA

Then, in the middle of April, I was on a run passing through the same general area and I spotted fairly fresh bobcat scat. It was classic bobcat scat – sometimes coyote scat can be a similar size and they can be confused, but not this one. It definitely tasted like bobcat scat (joke).

20160415_114444 v1bobcat scat / Wildcat Canyon Regional Park Richmond, CA

20160415_114544 v1bobcat scat / Wildcat Canyon Regional Park Richmond, CA

The evidence was mounting that a bobcat had moved into the area.

Back to tonight …

As I came around the other side of the euc trees I saw two ravens side-by-side on a branch, not very high up (probably 20 feet). They were very vocal and seemed to be focused on something on the ground. I paused, then slowly approached through the tall grass. As I got about 1/4 of the distance to them, what pops out from behind some tall grass? A bobcat!!

I froze. It froze. It thought I hadn’t seen it, so it slowly backed behind the grass, crouched then slowly turned around and started to go the other way. I quickly backtracked to the trail and returned in the direction I had come in hopes that I would see it try to circle back around me. As I did this, I kept track of what the ravens were doing – they had watched the whole encounter happen and now I realized they had absolutely been following this cat. As I paused in the trail after about 20 yards to listen and gauge my next move, the ravens flew over the area directly in front of me and circled a few times. They were tracking the bobcat and giving away its location! Sure enough, in about 10 seconds it appeared at the edge of the trail only 15 feet from me. We gazed at each other, and it slowly crossed the trail, pausing at the other side to study me. Slowly it moved in a circle around me and then passed, stopping to watch me at a number of times. OF COURSE I didn’t have my good camera rig with me, but, I was able to really enjoy a few moments of being close to this amazing animal – and snap a bad pic with my cell phone.

20160507_195751 v1bobcat / Wildcat Canyon Regional Park Richmond, CA

I love when “bird language” gives clues like this about what is happening on a landscape. That is part of the fun of being out there and staying aware – and no matter how many times it happens to me, it always seems like magic. So fun.

Right after that encounter, I saw a California newt on the trail – likely returning from a vernal pond where it bred, to seek refuge in the leaf litter under some trees during the warm and dry months of summer. I’m always thrilled to see these little salamanders.

20160507_200321 v1California newt / Wildcat Canyon Regional Park Richmond, CA

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Another 50 yards up the trail, as I went off-trail and into some thick cover, I heard and then saw an agitated Cooper’s hawk fly into the eucs where I was headed. Then I heard two great-horned owls respond, irritated about the irritated Cooper’s hawk! The Coop flew off, so I proceeded on. A loud rustling sound quickly caught my attention and I watched as a turkey flew up into some high boughs of a eucalyptus tree to roost for the night. As I walked under to get a better look, I heard the Coop again. I backtracked down the trail to where I had been before, and there in a dead tree was one of the great-horned owls, sitting very calmly with a backdrop of Richmond, Mt Tam, and a twilight sky. And right by it on the other side of the tree was the Cooper’s hawk, protesting loudly. Occasionally it would fly off and then return. This scene continued for about five minutes, and finally both birds departed. I am convinced there is a Cooper’s hawk nest adjacent to the area where the great-horned owl nest is. As I started to walk away, I heard a few juvenile red-tailed hawk calls in the background – hopefully I’ll see them fledged and playing in the area soon.

“Current Zach” is very pleased that “past Zach” got off the couch. Thank you, thank you, to this Land – this Land that has given me so much. The fact that we have such amazing parks so close to an urban area is a testament to the conservation efforts and hard work of so many people here – and I am grateful. Also very exciting that a bobcat has moved into the area, I hope to get to see it more!


night life updates

Some photos and updates from the last few weeks. Spring seems to have started in the beginning of February this year, the buckeye trees (usually the first to bud and the first to lose their leaves) were budding in some places as early as the end of January. Since then, the warm and sunny weather has drawn out flowers and buds all around. Fortunately, as I write this, the rains have started again – and we are due for much more.

Great-Horned Owl and Mount Tam at sunset / Contra Costa County CA

Two weeks ago (week of Feb 15th), on two different nights, I saw the Wildcat Canyon “Bottomhill” great-horned owl couple mate. The timing coincides almost exactly with when I saw another pair mate last year – I thought maybe the weather would affect the pattern, but apparently not. It’s somewhat odd as most literature indicates great-horned owls being an early breeder (compared to other raptor species), and in many areas are on nests in January in the snow. I guess owl culture, like human culture here in the Bay Area, is different in these parts as well (I joke – probably the Mediterranean climate is a factor, though I’d be curious to know how breeding behavior here compares to other warm areas). As I get deeper into my own observations of the world and its critters, I realize how little we actually know. Scientists in the past seem to have been content to generalize regarding behavior, and while there are patterns and a spectrum of those behaviors that are “typical,” often in reality it may be different based on local factors. That’s what makes it fun to be out there. Personality and local flavor.

The female always seems to initiate the act, and she starts by chasing down the male on the occasions that I’ve witnessed it. She lands close to him, and starts to do a vocalization very similar to a juvenile owl. When the male flies towards her, she starts a repetitive “hoo hoo hoo hoo” sound that reminds me of a monkey. As the male mounts her, flapping for a few seconds, she lets out a high pitched vibrato whistle and then its over. It will be interesting to see what happens this year, as last year many of the nests didn’t appear to successfully raise any young (drought related?). There are four pairs whose territories I regularly walk through, with a possible fifth – then another not far away. Of all those pairs, I only confirmed one successful nest last season.

Great-Horned Owl and moon / Wildcat Canyon Reg Park CA

Despite the very dry February, the vernal pools are deep and wide from all the rain in January, and have been extremely active with tree frogs and California newts. The newts migrate from their hiding spots under leaf litter back to the area from which they hatched to mate and lay eggs. The frog chorus, if you can sneak up on them, is incredibly loud when nearby. Nights of wandering under warm skies and no winds to a live symphony of frogs, and owls flitting around, is pizza for the soul.

California newts in a vernal pond / Wildcat Canyon Reg Park CA

I caught a few interesting moon shots this month, one was a moon halo and the other was an interesting rainbow effect on clouds as the full moon rose last time.


2015 Oct 28 – It’s that time …

The owls are back in their autumn cycle, starting to claim their territories.

IMG_1402 v1-2GREAT-horned Owl / Wildcat Canyon Regional Park , East Bay CA


20150907 owl pics

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great-horned owl / Contra Costa County CA (East Bay Regional Parks)

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Tonight I gifted with another evening watching the sunset with Lady Owl (of the “bottom of the hill” pair) – another exquisite early autumn night.


20150906 observations of the season

One of my favorite times of year – things are shifting! The patterns are changing all over, some more subtle than others. I’m hearing and seeing new birds as they pass through on their way south, and the resident birds and animals are starting to shift their patterns as well. Fox squirrels seem to be everywhere I turn, busy running and gathering. The mornings are sunny and there’s a slight crispness in the air starting to build, almost a bit electric. The light has a softness to it, despite the heat that today was above 90 deg F in the immediate Bay Area. Not easy weather, to, um, weather, for a landscape already parched with drought. Even the winds have gone elsewhere, allowing a degree of peace to settle over the stressed landscape. Sitting still I can hear bugs crawling through the leaves, and the occasional falling leaf even makes a sound as it falls through the dry undergrowth to join its crunchy fallen partners on the ground, who are now having the chance to use their voice – while not drowned out by Wind – to announce Coyote or Deer moving nearby. So fun!

IMG_0917 v1-2fox squirrel chowing on juniper berries

Things are incredibly dry here – you can read about it all over in the news, worst drought in over a century and possibly since settlers have been keeping records here. But, to really understand it all one needs to do is to go out to FEEL it and see it yourself. Springs and creeks are dry. The evergreen trees, such as the live oaks, are even losing some of their leaves (which I understand is a drought response tactic to minimize moisture loss). Many of the under story leaves and any leaves not at the top of the tree or on the exteriors have fallen away, to varying degrees, depending on the location of the trees. I’m able to see wood rat nests high up in canopies that were very difficult to see before. Even the California buckeyes, who are some of the first obvious beacons of autumn since they lose their leaves before most other deciduous trees, have been bare for weeks in some locations. Redwoods and cedars are looking wilted and brown. Even the non-native eucalytpus trees look scraggly. A fine dust encapsulates many of the leaves, and the hillsides are painted brown with wilted grasses.

I’m happy to report that I’m doing my best to help conserve water – infrequent showers, I don’t clean my bathroom, and I occasionally drink distilled beverages instead of water (the distillation process releases water back into the atmosphere – that’s science). Little gestures, they add up.

One benefit of the trees being thinned out (if one wants to be a “glass half-full type of person” – though a water analogy is probably not appropriate here), is that there aren’t many places for a large bird to hide. Until about two weeks ago, I was seeing with some regularity a family of Cooper’s hawks hanging in one particular area. I thought it was interesting that they were all still together this late in the season – the migration has begun for many birds already. The first day that I saw them, about three weeks ago, two juveniles suddenly appeared indiscreetly in the branches 20 feet above my head, crashing around either chasing each other or chasing potential prey (a bird). They finally settled into the interior live oaks next to me, and soon were joined by an adult. A few days later, I saw the same trio in a nearby tree near sunset. I don’t know much about these hawks’ chick-rearing patterns, but I couldn’t help but wonder if these hawks stay around parents longer than some other raptor species to learn from them. It could be a late nest, but it seems extremely late if so. Cooper’s hawks (and sharp-shinned hawks, their mini look-alikes) often tandem hunt in pairs, one flushing birds as the other wake hunts and catches them. Could it be that this is a learned behavior?

Of course I must mention the owls.

IMG_0950 v1great-horned owl

This gal has been very visible the last few nights in her “typical” spot, though it’s been a number of months since I’ve seen her with regularity. The male and the female do not seem to be together much this time of year, and I am convinced the male is roosting in a grove of trees about 1/2 mile away from the spot the females frequents, an area that seems to be their core area during mating season. She let me watch her as she was waking up two nights ago, doing some preening and stretching, then she hit “snooze” for a bit after she placed a hex on someone or something evidently right behind me …

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This photo was interesting, I wish I could have gotten both birds in focus – do you see it?

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Hummingbird came in to scold the owl! It hung around for a minute or so, just behind the owl.

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The next night, I wandered without my camera but was excited to get to spend some time with the female owl again. After she flew off to look for breakfast, I followed her out a path under the fading light of the sun that had already disappeared behind the mountains to the west. As I was about to crest a hill and descend into a small valley, another raptor caught my eye – juvenile cooper’s hawk! Likely one of the juveniles from the trio described earlier, though I didn’t see any of the others. This young one did some flights through some small oaks attempting to scare up some birds from their night perch, then having failed to get any takers, it landed on an old wood fence post and began to vocalize repeatedly – in what felt to me like frustration and irritation. It’s not easy being a young raptor (many species up to 70% don’t survive their first year). The young one made another attempt, alighted on a high tree nearby, then took off after three flying birds (who were not keen on the company).

As it finally flew off, I heard some coyotes howling just beneath me! I silently walked in that direction – then … crunching! Coming my way! I froze, and sure enough one, then another, then another appeared in the fading light. They didn’t seem to see me (or maybe they just didn’t care), once they all were in line together they trotted with purpose to the south to start their nightly excursions.

Last sounds I heard were the crickets calling as I walked through the “portal,” and the sound of cars from the highway took over the soothing sounds of nature. I’m so grateful for the parks that we have here in the Bay Area, like many of the creatures around, I wouldn’t survive here without them.