vole – Page 10 – Feathered Photography

A Few Recent Loggerhead Shrikes

There’s always a few Loggerhead Shrikes that winter-over on Antelope Island and I find them to be fascinating subjects. Their approachability is very unpredictable but occasionally they’ll allow me to get close, especially when it’s very cold in the mornings or if they’re about to hack up a pellet. These are images I was able to get in the last few weeks. ***Note: The last image in this post is graphic. If your sensibilities might be offended by such a photo please stop scrolling before you get to the last (6th) image. 1/3200, f/5.6, ISO 500, 500 f/4, 1.4 tc This bird was practicing its springtime melodic repertoire a few weeks early (image taken on 2/5/12). It was a relatively warm, sunny morning and it was singing its little heart out (if you can call shrike calls “singing”). 1/2000, f/6.3, ISO 400, 500 f/4, 1.4 tc With their black masks these shrikes always remind me of little bandits and they have an attitude to go along with that perception. They get their name from their unusually large head (loggerhead means “block head”). 1/8000, f/5.6, ISO 500, 500 f/4, 1.4 tc I like the soft, even light and the setting in this image even though the twigs in front of the bird may not be ideal for some. 1/640, f/7.1, ISO 640, 500 f/4, 1.4 tc I’m including this shot just for fun. I liked the fluffy, relaxed pose to go along with the yawn. 1/1250, f/7.1, ISO 500, 500…

Short-eared Owl Delivering Food To The Nest

In previous posts (here, here and here) about these Short-eared Owls at Red Rock Lakes National Wildlife Refuge I’ve shown and described snippets of the fascinating behaviors I observed when this male would deliver voles to the female and two youngsters at the nest. But it struck me that I’ve never put the whole process together in sequence so the behaviors could be fully appreciated so that’s what I’ll attempt to do here. Most of the images will be different from those in the previous posts. 1/1250, f/5.6, ISO 800, 500 f/4, 1.4 tc The male was a tireless and highly skilled hunter and I never saw him with any prey other than voles. When successful he would always return to the vicinity of the nest and land momentarily on one of two favorite perches – the dark sagebrush at lower right in the above photo or a metal post a few feet from the sagebrush. Here he’s coming in for a landing on the sagebrush with vole in talons and glances up at me to make sure all is safe. I really like the intense direct eye contact in the shot. 1/1000, f/5.6, ISO 800, 500 f/4, 1.4 tc Now he’s focused on the sagebrush in order to make a successful landing. 1/1250, f/5.6, ISO 800, 500 f/4, 1.4 tc This time he stayed perched for less than five seconds and didn’t even pull his wings in against his body – he just kept them out or up while he seemed to contemplate his next…

Just A Shot That I Like… #17 – Short-eared Owl In Flight With A Vole In Its Beak

This is another image from my time with the Short-eared Owls at Red Rock Lakes National Wildlife Refuge. This male was kept very busy hunting voles and feeding his mate and youngsters at the nest. Typically I would see him hunting far off, dive for a vole, and if he was successful he’d occasionally eat the vole himself but most often he would return with it to a favorite perch in the vicinity of the nest – and without exception he would always carry the vole in his talons before he got to the perch (and always his left talon, but I covered that topic in another post). 1/1600, f/5.6, ISO 800, 500 f/4, 1.4 tc However, just before (or just after) he took off from the perch to deliver the meal to his family he would always transfer the vole from his talons to his beak. I have a theory as to why he did so. The nest was on the ground at the base of a sagebrush. Whenever the male landed at the entrance to the nest with the vole the female would rush out and very aggressively grab the vole. And I DO mean aggressively! If I’d been him I’d have been afraid to get that close to her with food. So the male would approach the nest very gingerly with the vole in his beak and drop it in front of him and quickly retreat as she rushed out. I suspect it was easier for him to avoid a confrontation with her if he could quickly drop…

Northern Harrier Hunting a Vole

Over the last five years I’ve spent an inordinate amount of time photographing, watching and studying hunting Northern Harriers. When they pounce on their prey the action is usually so far away (or buried in the vegetation) that I don’t get a good look at what’s actually happening. But all that changed with this adult female who was so intent on capturing a vole buried deep in the matted, dried vegetation that she virtually ignored me. What fun to watch! Unlike most other hawks, harriers very often use auditory cues (sound) to locate prey. In fact they have a facial “ruff” or disc much like owls do and its purpose is the same – to funnel sounds to the ears. The feathers that form the disc can be raised in response to noise, essentially enlarging the disc and improving hearing. 1/1000, f/8, ISO 500, 500 f/4, 1.4 tc Harriers often hunt along predictable “pathways” and this one had made several passes by me earlier. However this time she attempted to pounced on something right in front of me – almost certainly it was a vole since they are very nearly the exclusive diet of wintering harriers. 1/1000, f/8, ISO 500, 500 f/4, 1.4 tc She missed the vole but from her demeanor she could obviously hear it under the mat of vegetation and she became quite agitated in her attempts to get at it. 1/1600, f/8, ISO 500, 500 f/4, 1.4 tc She repeatedly rose into the air a couple of feet and pounced back down on the same spot with her…

Kiting Rough-legged Hawk

Kiting is the ability of some birds to maintain a stable position in the air by using air currents rather than by the flapping of wings or hovering. Last week I had a wonderful opportunity with this young Rough-legged Hawk while it was kiting in the stiff wind rising up from the Antelope Island causeway. The light was good and the bird was cooperative and let me get close – what more could a bird photographer wish for? 1/1000, f/8, ISO 500, 500 f/4, 1.4 tc It was amazing to see how still in the air this bird could be – often maintaining the same relative position to the ground without significant wing movement for long periods. I swear that if I had been using a tripod I could have focused on the bird, walked away for 10 seconds or so and then returned and snapped the shutter with the hawk still in the frame and without having had to look through the viewfinder or refocus. A bit of a stretch perhaps, but not by a lot. 1/2500, f/6.3, ISO 500, 500 f/4, 1.4 tc Much of the time the hawk was hunting – looking down into the grasses for voles. That head position doesn’t provide the eye contact that is photographically desirable but I wanted to include a shot that illustrated hunting posture. 1/1600, f/6.3, ISO 500, 500 f/4, 1.4 tc The hawk caught several voles while I was photographing it. In this instance the bird immediately took to the air with the very young vole… …

Sometimes the Prey Bites Back

I hope you’ll bear with me but this post will be more about behavior than image quality as I just didn’t have a good light angle for this little drama. As I’ve said elsewhere on this blog, one of my primary goals is to document interesting behaviors and at times that will take priority over the quality of the images. When Rough-legged Hawks dive on prey it can be fairly dramatic. Typically they hover high up over the potential prey for a few moments, then dive fast and at a fairly steep angle. Occasionally they seem to hit the ground so hard that it rattles my teeth, almost making me expect them to bounce on impact. 1/2000, f/7.1, ISO 500, 500 f/4, 1.4 tc This morning I watched this hawk hover, then dive. I think you can see from the wing position that this bird was still traveling at a good clip and at a fairly steep angle when it was only a couple of feet from the ground. The prey was on a hill above me and buried in this vegetation so I didn’t see the impact. 1/2000, f/7.1, ISO 500, 500 f/4, 1.4 tc Often these attempts at prey are unsuccessful but this time the hawk caught a vole (along with a talon-full of debris). The bird came out of the grasses directly toward me but then turned to its left to give me a side view. 1/1600, f/7.1, ISO 500, 500 f/4, 1.4 tc This little vole had a bucket-full of attitude and didn’t want to go down…

Just A Shot That I Like… #6 – Short-eared Owl In Flight With Prey

Sometimes conditions are marginal at best for avian photography and that often seems to be the case for me when I’m presented with an otherwise wonderful opportunity. Then the decision must be made – go ahead and shoot anyway, knowing it’s likely that I won’t get any keepers or just pack it in and watch and enjoy the birds? 1/640, f/5.6, ISO 800, 500 f/4, 1.4 tc, noise reduction to background Such was the case with this Short-eared Owl at Montana’s rugged and remote Centennial Valley. It was an overcast day and there generally wasn’t enough light for photographing birds in flight but this male was regularly delivering voles to his family and would occasionally fly right by me as he did so. I could have removed my teleconverter to get a little more shutter speed but then the owl would be quite small in the frame so I just decided to fire away and hope for the best. Even at ISO 800 (the absolute limit for my 7D without getting too much noise) I was often getting shutter speeds of 1/500 or slower at f/5.6 – just not fast enough to get birds in flight sharp. I got lucky with this shot. As the owl was coming in, the clouds behind me opened up slightly to allow a little more light on the bird and a shutter speed of 1/640 – just enough to get good sharpness on a relatively large and slow flying bird if your focus is well locked on to the subject. The still shaded Centennial Mountains provided…

The Shot That Broke My Heart

There was a range fire on the north end of Antelope Island yesterday that forced managers to clear out all campers from the campgrounds. So when we arrived early this morning the campgrounds were empty and this young coyote was hunting on the edge of Bridger Bay Campground. Canon 7D, 1/2500, f/6.3, ISO 500, EV +0.33 Normally the coyotes on the island are elusive and difficult to approach but I believe this to be a young one so it didn’t seem overly concerned about us. Besides, he/she obviously already had a quarry in sight deep in the grass and wasn’t about to let us interfere with the hunt. In this image the coyote has just spotted something of interest in the grass some distance in front of “him”. Canon 7D, 1/1600, f/8, ISO 500, EV +0.33 Here the coyote begins to make his stalk. At first he didn’t crouch down so that he could see what ever it was he was after through the grass. Canon 7D, 1/1250, f/8, ISO 500, EV +0.33 But as he got closer (both to the potential prey and to me) he began to crouch down, almost in a cat-like manner. At this point I suspected that something dramatic might happen and tried to prepare myself for “the shot”. The most common prey of coyotes on the island is voles but I was pretty sure it wasn’t a vole because the coyote was too far away from his point of interest when he first spotted it to…

Short-eared Owls Defending Their Nest Against Predators

Recent reports from others indicate that bird activity on Antelope Island is slowing down now and our experience out there recently would agree with that assessment so yesterday when Mia and I were trying to decide where to go shooting birds we were a little hesitant about another trip to the island. But even with things slowing down we almost never fail to find something interesting to photograph and yesterday was certainly no exception! Canon 7D, 1/800, f/7.1, ISO 500, EV 0, 500 f/4, 1.4 tc Soon after arriving on the island we noticed a pair of Short-eared Owls, obviously mated based on their behavior. Canon 7D, 1/1000, f/7.1, ISO 500, EV 0, 500 f/4, 1.4 tc This owl was carrying a vole and we immediately suspected that the pair had a nest in the vicinity, which turned out to be true. It was quite a distance from the road and buried in vegetation but we could tell its location by watching this owl deliver food to the nest site – either to the mate or to both the mate and chicks. We watched and photographed the birds for a while but when things slowed down we went further down the island. Canon 7D, 1/1600, f/8, ISO 640, EV + .67, 500 f/4, 1.4 tc On our return to the area of the nest we immediately saw a quickly developing drama. A young coyote had apparently just crossed the road and was approaching the nest area and the owls were in…

American Kestrels – What They’ll Eat and What They Won’t.

I’ve always found it fascinating to watch these little falcons eat. A gruesome experience to be sure but so much more interesting than observing a raptor such as an owl who simply swallows its prey whole. And if you watch carefully there’s a whole lot more going on during the process than first meets the eye. Kestrels can be pretty picky eaters. I’ve documented in another post on this blog that they often refuse to eat the intestinal tract of their prey and deliberately discard it. Kestrels, like other raptors, eject pellets of indigestible materials like fur, feathers, chitin and bone. All food that is swallowed first goes to the crop. From there the usable food continues on to the stomach but the indigestibles stay in the crop, are formed into a pellet and regurgitated roughly 23 hours (in the case of kestrels) after the meal was consumed. Canon 7D, 1/800, f/7.1, ISO 640, 500mm f/4, 1.4 tc The kestrels I’ve watched eating voles and mice typically eat the brain, decapitate the rodent, then go for the soft internal protein rich muscles and other organs (discarding the intestines). Since kestrels tear their prey into bite-sized pieces they can pick and choose what they actually swallow. Canon 7D, 1/400, f/8, ISO 640, 500mm f/4, 1.4 tc Pellet expulsion can be difficult and traumatic as I’ve documented elsewhere on this blog with Northern Harriers and I suspect that’s one of the reasons that kestrels try to avoid swallowing as much fur as possible. When opening up the body cavity they often get a beak-full of…

Fish Eating Northern Harriers

As I’ve mentioned before in this blog, the winter of 2008 was a particularly brutal one in northern Utah. During January and February there was much more snow than usual and it was bitterly cold. During most winters our Northern Harriers rely primarily on voles as a food supply but in 2008 with the voles under the deep crusty snow our harriers were desperate for food. Birds of North America Online provides extensive information on the dietary habits of harriers. It lists small to medium-sized mammals (primarily rodents), birds, reptiles and frogs as harrier food sources, stating further that the diet of harriers during winter in their northern range (which includes northern Utah) consists of voles “almost exclusively”. I can find no mention of harriers eating fish, ever! Each year in early February some of our wetlands managers treat some of our ponds with rotenone (a chemical that prevents oxygen from being absorbed across fish gill membranes) in an effort to control the invasive and damaging carp that do so much damage to the emergent vegetation which is so vital for waterfowl. So, in 2008 for a few weeks, our desperate and starving harriers began to eat fish! In the three winters since then I have never seen harriers eating fish even though the dead carp are always plentiful after the rotenone kill. 1/1250, 1/1000, ISO 500 Many of the carp are brought to the shores or ice surface by Bald Eagles which makes them available to the harriers who generally cannot retrieve them from the water. 1/1250, f/8, ISO…

Handedness in Short-eared Owls

Last summer Mia and I spent four days photographing a family of Short-eared Owls in Red Rock Lakes National Wildlife Refuge. There were two baby owls in a nest under a sagebrush guarded over constantly by the female while the male hunted and brought in food. That food in every instance that we saw was a vole (mouse-like rodent). Many of the photos I took were of the male in flight, returning to the area of the nest with a vole in his talons. Male with vole It wasn’t until I returned home and began processing the images that I began to notice that the male always seemed to carry the vole in its left foot. This piqued my curiosity about something I’d never considered – do some birds show “handedness” – the preference of using one limb as opposed to the other? Could this male owl, or perhaps all Short-eared Owls, be left-“handed”? Once again, carrying the vole in the left foot So I decided to do an inventory of my images of these birds to see what would turn up. After culling my photos of these owls from this trip I had 271 photos to go through. Most of those were flight shots of the male and in more than half of them he was carrying a vole. My goal was to try to determine how many “sorties” he made with a vole that I had photographed (I often got multiple shots of the male with the same vole in the same sortie) and determine what percentage of the time he…

Rough-legged Hawk – Defensive Posture

Most birds are defensive of their territories and space and raptors are certainly no exception. Rough-legged Hawks and Northern Harriers both prey heavily on voles (mice-like rodents) so when a new bird of prey comes in to the established hunting territory of another there are often conflicts, with the established bird attempting to drive off the interloper to avoid competition for food resources. Rough-legged Hawk As I was photographing this Rough-legged hawk sitting peacefully in a tree I noted a definite change in its demeanor so I looked around and spotted a Northern Harrier speeding toward the hawk from my right. I anticipated that the harrier would “buzz” the roughie and since I was much too close to get both birds in the frame when it happened I decided to concentrate on the reaction of the hawk as the interaction occurred. I never did get the harrier in the frame in any of the shots. In the image above, the roughie hasn’t yet seen the harrier coming in (nor have I). The incoming Northern Harrier has been spotted When I noticed this posture change in the roughie I knew something was up, so I looked in the direction the bird was focused on and saw the harrier coming in fast. Beginning to react Here the hawk is beginning to react to the swift and aggressive approach of the harrier by beginning to fluff up. Defensive posture This shot was taken when the harrier, traveling very fast, was closest to the hawk – roughly three…

Short-eared Owl in the Fog

My friend Mia and I had such a great time in June with the Short-eared Owls at Red Rock Lakes National Wildlife Refuge in Montana that we decided to return in September. Getting close to them was more difficult this time because they weren’t nesting and feeding young. However, one morning we got lucky. A cooperative Short-eared Owl When we awoke we were socked in with heavy fog. As it slowly began to clear we went looking for birds and found this owl perched in the middle of the road. As we approached, it flew a short distance to this post and then allowed us to get very close. We’re sure this is the same female that we had photographed in June on the same territory. Short-eared Owl female looking for voles She was very accepting of our presence and within a few minutes was looking for voles below her post perch. We were right at the edge of the fog and as it would swirl around us, alternately getting thicker and then clearing a bit, we knew that some of our images would show the effect of the fog more than others. The soft feathers of owls don’t give up their fine detail to photographers easily, even in the best of conditions. But we simply couldn’t pass up this opportunity with this beautiful female and we still got some shots we like very much. Short-eared Owl checking us out Occasionally her attention would be diverted from the potential prey in the…

The Challenges of Photographing Birds in Flight in Low Light

Photographing birds in flight in relatively low light (dusk, dawn, cloudy conditions etc) isn’t easy. In addition to the expected challenge of locking focus onto a fast and often erratically moving target, in low light you have the problem of getting enough shutter speed to get a moving subject sharp. A potential solution to the problem is “opening up” – increasing the size of the aperture, which is the same as reducing the f-number – say as in changing your setting from f/7.1 to f/5.6. This lets more light into the camera in the same amount of time, allowing for an increase in shutter speed to freeze the motion of the bird. Opening up however has another effect – reducing depth of field, so less of your subject is likely to be tack sharp. Another potential solution is to increase ISO. Increasing ISO in digital cameras has the effect of seeming to increase the sensitivity of the camera’s sensor to light so that faster shutter speeds can be used but the downside to increasing ISO is that it can increase digital noise in the image. Sometimes in bird photography fantastic opportunities with birds in flight present themselves in less than ideal light. Your best chance at an acceptable image under those conditions is to understand the interplay between your camera settings – how changing aperture affects shutter speed and depth of field and how changing ISO affects shutter speed and the production of digital noise. Male Northern Harrier, 1/1250 @ f/11, ISO 800 It’s not often I get a…

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