bear river migratory bird refuge – Page 28

A Cannibalistic Long-tailed Weasel

Long-tailed Weasels are elusive and fascinating critters. Some interesting information about them might include the following: sexually dimorphic, females 10 to 15% smaller than males the name is appropriate as the length of their tail can equal up to 70% of the head and body length eyes are black in daylight but glow a bright, emerald-green in a spotlight at night like other mustelids, have anal scent glands that produce a liquid with a strong, musky odor go through delayed implantation, they mate in July-Aug but implantation (and growth) of fertilized egg into uterine wall is delayed until March but after implantation the embryo develops for only 4 weeks before birth. This timing allows for birth in spring when prey is abundant. are obligate carnivores, prefer prey fresh or alive, seldom eat carrion aggressive and fearless hunters, often killing prey much larger than themselves with a bite to the neck favorite prey includes mice, rats, chipmunks, squirrels, moles, shrews, rabbits and chickens are “surplus killers”, often killing more than they can consume And they are occasional cannibals! Previously I posted two images from this encounter with a cannibalistic weasel at Bear River Migratory Bird Refuge. These three photos are new to my blog. This weasel had killed one of its kin and was trying to run with the body along the road at the refuge. It was having a very difficult time carrying that long corpse through all the vegetation, which was probably the only thing that slowed it down enough for me to manage…

Great Blue Herons On Snow and Ice

Christmas Morning at Bear River Migratory Bird Refuge was nothing short of spectacular. We had great light, wonderfully clear blue skies and lots of birds. And it was cold – as low as 6 degrees F. Perfect! On this trip (which included the Promontory Point area) we saw a plethora of raptors – Bald and Golden Eagles, Red-tailed Hawks, Rough-legged Hawks, American Kestrels, Short-eared Owls, a Prairie Falcon and one Barn Owl hunting in daylight because of the cold. And I’ve never seen as many Great Blue Herons in one relatively small area as I did on that morning. Just before I stopped to take this photo there were over 100 of them on the ice of the canal to the right and along the far bank in less than 1/3 mile – which led to a topic of conversation. Mia is from Florida and we discussed how seeing Great Blue Herons on snow and ice seems incongruous to many folks from warmer climates. That conversation was the inspiration for this post. 1/4000, f/6.3, ISO 400, 500 f/4, natural light As is typical for western herons, these birds were difficult to approach (in some areas like Florida one can almost walk up and touch them at times). This juvenile was fishing in a patch of flowing water surrounded by ice and snow. 1/2500, f/6.3, ISO 400, 500 f/4, natural light Then the same bird flew off and then came back to land within a few feet of where it had been fishing – almost like it was…

Clark’s Grebes – Parents Feeding Fish To Some Very Excited Chicks

This past June I spent lots of time with Western and Clark’s Grebes as they were raising their families. The two species are quite similar but the adult birds in this post can be recognized as Clark’s Grebes by their bright yellow-orange bills and the fact that their eyes are surrounded by white plumage, rather than black. 1/2000. f/7.1, ISO 500, 500 f/4, 1.4 tc, natural light This female of a mated pair was fishing for her family as the male back-brooded two chicks (the sexes take turns with each role). I happened to catch her just as she emerged from the water with a fish and shook the water off. I wish I had better eye contact and more room around the grebe, but this image is full frame. I include it here because it’s the logical beginning of this “fish story”. 1/2000. f/8, ISO 500, 500 f/4, 1.4 tc, natural light Seconds later she swam over to deliver the fish to her family. Sometimes the fish will be given to the brooding parent, who may eat it or give it to a chick. Other times, the fishing parent gives it directly to one of the youngsters. Either way, if the chicks are hungry they become very excited and aggressive in their attempts to be the one who gets the fish. Before the young birds saw breakfast coming their way, they were tucked down peacefully under each wing with only their heads and necks sticking out. All that changed in an instant. 1/2000….

Western Grebe Chick Reacts To Food

I’ve always enjoyed spending time with Western Grebes but until this past summer I’ve had very little success in photographing parents back-brooding their chicks. In June at Bear River Migratory Bird Refuge my luck with this behavior changed and I was able to get quite a few nice images of the chicks on the backs of the parents over many days. Here, two chicks wait patiently on the back of one of the parents while the other one attempts to catch fish for breakfast. The fishing parent would feed small fish to both chicks and to the brooding parent. The chicks watch attentively for the adult to emerge from the nearby water with something to eat. I was always torn about what to photograph – the parent with the fish or the reactions of the chicks to approaching food. In this case I chose the latter. Here, the chick on the right has just spotted its parent come up out of the water from behind with a small fish and is beginning to react. Usually, both chicks were hungry and competed for the food but this time the youngster on the left was full and not interested in anything to eat. But the chick on the right didn’t know that and went into full competetive begging mode. I always enjoyed watching these reactions to food. Ron

Juvenile Marsh Wren

I normally have difficulty getting close enough to Marsh Wrens for them to be large enough in the frame to show good detail. They’re very small, incredibly flitty and they inhabit busy backgrounds – all challenges for the photographer. Last year I had some success with adults but juveniles have always eluded me. 1/1600, f/6.3, ISO 500, 500 f/4, 1.4 tc But yesterday at Bear River Migratory Bird Refuge I found this cooperative juvenile in good light and the background reeds were far enough away from the bird to soften nicely. And I didn’t even get shadows from the reeds falling on the bird which is unusual for me. I love these feisty, raucous little birds and they have unbelievable energy. They scurry from perch to perch and sing almost continually, day and night during breeding season, in their bid for reproductive success. It makes me tired just to contemplate such a frenzied existence. Think I’ll take a nap… Ron

Western Grebe Chick – A Lesson Learned In Feather Eating

Most grebe species are well known for feather-eating and the Western Grebe is certainly no exception. I’ve seen and photographed them gobbling down feathers multiple times. While the purpose of such behavior remains unproven it is suspected that the feathers enable more efficient digestion of fish bones and aid in removing digestive parasites. I’ve discussed this in further detail and provided more images of the behavior here. 1/2000, f/8, ISO 500, 500 f/4, 1.4 tc The feathers on their flanks and scapulars are in almost constant molt and when grooming dislodges them they are deliberately swallowed. Often, as was the case here, the feather is floating on the surface of the water and the grebe simply snatches it up as it floats by. 1/2000, f/8, ISO 500, 500 f/4, 1.4 tc But this time the feather was fed to the chick on the back of the parent. Adults begin feeding feathers to their offspring on the first day of their lives. BNA reports that researchers have found over 300 feathers in the stomachs of individual chicks that were no more than three days old. 1/1600, f/7.1, ISO 500, 500 f/4, 1.4 tc But of course not just any old feather will do. It must be small, soft and downy and without a stiff quill but apparently this is a lesson that the chicks must learn for themselves. As soon as the youngsters begin to make occasional forays off the backs of their parents and into open water they begin to experiment with feathers they…

Western Grebes – Aggressive Speed Demons

I’ve spent a lot of time over the years watching and photographing the behaviors of Western Grebes and I’ve been impressed by both their aggressive tendencies toward other birds and by their incredible acceleration and speed in “running” across the water at those same birds. In my experience that aggression is most often directed toward other grebes in defense of mates, chicks or feeding areas but they are also aggressive toward a variety of other species and are suspected of stabbing them with their bill from under water. BNA reports Mallards and Red-necked Grebes found dead from stab wounds to the abdomen that were probably administered by Western Grebes. I’ve found photographing them as they dash across the water to be very challenging because of their speed and the unpredictable nature of the behavior – it usually comes with little or no warning and direction is difficult to anticipate. 1/1250, f/6.3, ISO 640, 500 f/4 Though these birds appear slim while sitting on the water, in reality they are fairly chunky and at the end of one of these “runs” their wide body throws up quite a wide wake as they begin to slow down and settle back into the water – much like a speedboat after the engine has been cut. 1/1000, f/6.3, ISO 500, 500 f/4, 1.4 tc This grebe is early in the acceleration stage with its “bow” still raised high. 1/1000, f/6.3, ISO 500, 500 f/4, 1.4 tc And then another wake as it begins to settle into the water. 1/1600, f/6.3, ISO 500,…

A Birthday Bounty Of Bear River Birds

Wednesday of this past week was my “medicare birthday”. I’m sure older readers will understand why my psyche needed some bolstering and I felt justified in burning up some extra gas and putting even more miles on my pickup for a trip to Bear River Migratory Bird Refuge to help take my mind off of my advancing age. It was worth the trip! While I didn’t get any truly spectacular shots it was a wonderful morning with excellent weather and light, lots of cooperative birds and great company – thanks to Mia. The only downside was that I had 35 gigs of images to cull when I got home… A couple of notes about my techs: a), regular readers are probably aware that I nearly always shoot with the 1.4 tc attached to my 500 mm. On this morning I got so close to many of the birds that almost half of the images I’ve posted here were taken without the tc and b), many of these images were taken with a very high shutter speed which is typical for me since I’m usually set up for action shots after firing off a few times on more traditional poses. All photos are presented in the order they were taken. 1/1250, f/5.6, ISO 640, 500 f/4, 1.4 tc On the road to the refuge we came across a pair of Short-eared Owls cavorting in the air right after the sun came up. One of the owls was “sky dancing” but by the time I got the pickup…

A Mixed Bag Of Recent Birds

These images were all taken over the last eight days, either at Bear River Migratory Bird Refuge or Antelope Island. Another one of my “potpourri” posts with no common theme except “feathers”. 1/640, f/7.1, ISO 640, 500 f/4 The Willets have finally come up on the island for their mating activities (as opposed to the shoreline for recuperation after migration) and I like to try to catch them perched high on the sagebrush where they call loudly to other Willets. 1/2500, f/6.3, ISO 500, 500 f/4, 1.4 tc Western Meadowlarks are in their glory right now and their distinctive songs reverberate all over the island. 1/5000, f/6.3, ISO 500, 500 f/4, 1.4 tc I got closer to this one than I usually can. 1/1600, f/7.1, ISO 500, 500 f/4 This Loggerhead Shrike was grooming peacefully when I noticed a distinct change in its behavior. 1/1250, f/7.1, ISO 500, 500 f/4 A Common Raven flew low overhead and this was the shrike’s reaction. It flattened its body out almost into a bullet shape and pointed that bullet at the raven as it passed. I’m guessing it was an instinctive behavior to present the smallest profile possible to a larger bird that might be a potential threat. It was comical to watch it turn as the raven flew by to keep its body pointed in the larger birds direction. 1/2000, f/6.3, ISO 500, 500 f/4, 1.4 tc I’m always happy to catch a Chukar perched on a boulder, especially when it isn’t one of the…

Swainson’s Hawk

A recent comment on this blog by Mike Shaw reminded me that I’ve never made a Swainson’s Hawk blog post. Part of the reason is because I’ve had relatively few opportunities with them so my files are limited. But in reviewing my images I thought I had enough acceptable photos to make a representative post on the species. I’ve deliberately chosen shots that show these hawks from a variety of angles – front, back, side and in flight. 1/2000, f/7.1, ISO 400, 500 f/4, 1.4 tc I found this young bird hunting grasshoppers along a gravel road at Red Rock Lakes National Wildlife Refuge. It would catch a ‘hopper, eat it on the road and then return to a nearby fencepost to watch for more of them. The bird seemed to be fearless and paid me very little attention. 1/1200, f/8, ISO 400, 500 f/4 Occasionally it would land on a different post but it didn’t stray far for quite a while. With this pose we get a good look at the back side. 1/1600, f/8, ISO 320, 500 f/4 I thought this screaming pose was interesting enough to include here despite the nictitating membrane partially covering the eye and the slight tightness on the tail. 1/1000, f/8, ISO 320, 500 f/4 This is a different bird and I include the image for the good look at the underside plumage patterns in flight. 1/1600, f/8, ISO 500, 500 f/4, 1.4 tc I found this cooperative adult at Farmington Bay Wildlife…

Angry Barn Swallow

As I approached the parking lot at Bear River Migratory Bird Refuge just before taking the loop road there were myriads of swallows flying around as per usual in spring and early summer. I noticed this Barn Swallow on a post and decided to take a few shots. It let me approach very closely and I didn’t know why at first but it soon became very apparent that this bird was in distress. If you look closely at the image above you’ll notice that there is “something” connecting the tips of a tail feather and one of the primary wing feathers that prevented this bird from flying and as a result it was a very unhappy and frustrated bird! I photographed this swallow for over 10 minutes as it struggled to solve its incomprehensible problem. It would alternately attempt to break the connection by raising and extending its wings and… trying to reach the problem area with its beak, which it just couldn’t quite do. At times its apparent anger and frustration (anthropomorphic of me, I know) became quite evident as it would momentarily cease struggling and just sit there and call out pitifully. But eventually the connection between the feathers broke and the bird flew off instantly – so fast that I missed the shot. I still don’t know for sure what substance caused this problem. It has been suggested by others that it could have been spider silk. I’ve also wondered about the possibility of sticky tree…

Marsh Wrens of Bear River Migratory Bird Refuge

This week I was finally able to get some decent images of Marsh Wrens. Canon 7D, 1/2000, f/8, ISO 400, 500 f/4, 1.4 tc In the past these birds have always been buried too deeply in vegetation for me to get shots I liked but a couple of days ago they finally cooperated with me. Canon 7D, 1/1600, f/8, ISO 400, 500 f/4, 1.4 tc Marsh Wrens have incredibly interesting behaviors. For example, western males must learn up to 200 different songs (eastern birds only learn about 50). Perhaps that’s why these males sing so much – it would take a lot of practice to learn that many “tunes”. Canon 7D, 1/1600, f/8, ISO 400, 500 f/4, 1.4 tc These birds are extremely territorial and aggressive. They are polygynous (males mate with multiple females) and in order to attract females the male builds from 6 to 22 “dummy” nests for every one that is actually used to raise a brood of chicks. We could see several of these nests buried in the cattails along the refuge road. Canon 7D, 1/2500, f/7.1, ISO 400, 500 f/4, 1.4 tc According to the Bear River Blog many of these nests were destroyed by our recent stormy weather and heavy rains so many of these males have had to start over. Canon 7D, 1/2000, f/8, ISO 400, 500 f/4, 1.4 tc Marsh Wrens of both sexes regularly destroy eggs and chicks of other birds near their territories, including those of…

Northern Harrier with Nesting Material

I’ve been photographing Northern Harriers in northern Utah for five years now and until earlier this week I’d only seen this species carrying nesting material once before and wasn’t able to photograph it. Harriers are very common here during winter but most of them head north for the breeding season and those that stay usually build their nests in inaccessible areas of the marsh, so it’s rare for me to see any nesting activities. Canon 7D, 500 f/4, 1.4 tc, 1/2000, f/7.1, ISO 400 Two days ago Mia and I were photographing birds at Bear River Migratory Bird Refuge. We were about to call it a day because it was late in the morning and light was no longer optimal when we spotted this harrier flying at a distance. We figured it would veer off before it got close, as they always seem to do out there, but this one kept coming toward us. We were watching it through our lenses and soon noticed that it had nesting material in its beak. Canon 7D, 500 f/4, 1.4 tc, 1/2000, f/7.1, ISO 400 By chance we happened to be at a place on the dirt road that was within 100′ or so of the nest of this bird. It decided to ignore us and come in to complete its delivery. Canon 7D, 500 f/4, 1.4 tc, 1/2000, f/7.1, ISO 400 The nest is apparently in this bed of last year’s dead Phragmites. The dark spots you see in the last three images of this…

Long-tailed Weasel – Efficient Hunter and Cannibal

Long-tailed Weasels are obligate carnivores (eat meat exclusively), preying largely on smaller rodents but also take rabbits, chipmunks and birds – including poultry. They take down prey several times their size and occasionally go on killing sprees triggered by the smell of blood. Long-tailed Weasel, summer molt Their long black tipped tail, slender bodies and darker brown coloration above with creamy white ventral parts are identifying features. The very similar Short-tailed Weasel is smaller and has whiter feet. In this case the prey is another weasel While driving the loop road at Bear River Migratory Bird Refuge this weasel ran in front of us carrying another weasel that it had apparently killed. Weasels are cannibalistic at times and I’m relatively certain that this kill was destined as a meal rather than the kill being made simply out of aggression because the winning weasel was very reluctant to abandon its prize even with us very close. It took a great effort for the weasel to carry its long-bodied kin through the grasses and reeds and it simply would not abandon it. Hopping with it’s prey Here you can get a feel for how difficult it was to drag the long body through all the obstructions so most of the time it would hop forward, one jump at a time, presumably with its burrow as a goal. Long-tailed Weasel, winter molt As winter approaches, northern weasels molt to white (while retaining the black tipped tail) – the advantage of this is obvious. Interestingly, many weasels living in the southern part of their range…

Bathing Cinnamon Teal/Green-winged Teal hybrid

Though bathing is a common activity for waterfowl it can make for some interesting photographs. I found this bird at Bear River Migratory Bird Refuge at the end of May last year. Cinnamon Teal x Green-winged Teal Hybrid male While I was processing some of the images I noticed the unusual crescent-shaped marking running through the eye to the back of the head that is typical of the Green-winged Teal. I asked several very knowledgeable birders about this bird and they think this is a CT/GWT hybrid, which apparently is quite unusual. Red eye looking at you through a layer of water While bathing he would repeatedly dunk his head and shoulders under water and then lift them up, which would roll water over its back and wings. An interesting process to watch and photograph at such close range. Here he’s looking at me through a layer of water over his head and eye as he brings his head out of the water. Forcing water over the back Here’s the water on the back. Washing the back feathers Then he would shake vigorously which would wash the back and upper wing feathers and send water droplets flying. Rearranging the wing feathers After so much vigorous activity the feathers, particularly those in the wing, needed rearranging to put them in their proper places. Preening after the bath Then came the preening. Lots of it. Here he is grooming individual breast/lower neck feathers. After the bath And here…

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