Ecology and Environment – Page 20 – Feathered Photography

Birds, Spiders, Brine Flies and Mercury Contamination on Antelope Island

Last Sunday I found this Northern Shrike on Antelope Island enthusiastically singing away as if spring were already in full bloom. Their predatory habits and interesting behaviors make them a favorite species for me but when I got home that day I read an article in the Salt Lake Tribune that made me wonder just how healthy their populations near the Great Salt Lake really are. North end of Antelope Island, 2/5/12 The reason for my concern is a bit complex but I’ll summarize: For over 100 years smelting operations have been responsible for high levels of elemental mercury in the Great Salt Lake and its sediments. Microorganisms in the lake convert the mercury to methyl mercury which is the toxic form of the element that can be absorbed by tissues of living things. Brine fly larvae living in the lake then absorb the methyl mercury and when they hatch the adult flies are consumed by spiders living in the vegetation around the lake. Finally, those spiders are eaten by the many bird species living and nesting along the shoreline. But very little is known about the movement of mercury compounds through Great Salt Lake ecosystems, including the possible effects of toxic methyl mercury on birds so Westminster College’s Great Salt Lake Institute was recently awarded a $250,000 grant from the W.M. Keck Foundation to study its possible effects. Antelope Island causeway, 8/29/11 The number and total biomass of brine flies in late summer around the lake literally boggles the mind but this shot should give you some idea. It was taken in late August of…

Harlequin Ducks Along Antelope Island Causeway Have Apparently Been Killed

As many of you are aware there have been three Harlequin Ducks along the Antelope Island causeway for many weeks now – two females and one male. These ducks are extremely rare in Utah as there’s only been a handful of sightings of the species in our state over the years. These three ducks have been enjoyed by bird lovers and others at the first bridge on the causeway for about six weeks this early winter. They were quite approachable by people and were a delight to observe and photograph. According to reports, all three ducks are now dead – “harvested” by hunters. Here’s a link to a very enlightening (in more ways than one) discussion of the reported incident on a hunting forum. Killing these rare ducks along the causeway is apparently perfectly legal. Whether or not it is ethical is very much open to question – including by many in the hunting community. Harlequin Duck. Photo taken on 10/30/11 at first bridge along causeway Female Harlequin Duck – photo taken on 11/17/2011 at first bridge along causeway Male Harlequin Duck coming into breeding plumage – photo taken on 11/17/2011 at first bridge along causeway Though I’m not a hunter I’ve been an avid supporter of hunting for many years – including extolling the positive effects the practice has had on wildlife populations to my high school zoology and biology classes for 33 years. Should it turn out that the person reporting the killings of these ducks has been less than truthful and the birds turn up again in the future I…

Barn Owls and Phragmites

Barn Owls are among my favorite avian subjects. They’re uncommon, elusive and rarely active in daytime so they’re devilishly difficult to photograph in good light – especially in flight. And they’re unique – so different from other owl species (heart-shaped facial disc, smaller eyes, a short squared tail and serrated central claws) that they’re given their own family classification – Tytonidae. They’re the most wide-spread species of owl on earth, though their numbers are declining. Occasionally, very occasionally, I’ve had the opportunity to photograph them in daylight. Around here they can sometimes be found hunting for voles at the edge of Phragmites stands at the local marshes during the early mornings of the coldest days of winter. Phragmites is a very large perennial grass found in our wetlands that causes many problems for wetlands managers because it produces substances that are toxic to more beneficial species of marsh plants. 1/2000, f/8, ISO 400 1.4 tc As problematic as Phragmites can be I’ve found it to be a wonderful background for photographs of birds in flight. And since these owls fly during daytime only when it’s very cold the Phragmites is often covered with heavy frost in the mornings which can soften the background and make it very pleasing to the eye. If the grasses are close to the bird they appear fairly well-defined. 1/2000, f/8, ISO 400 1.4 tc But if they’re far away the bokeh of the background is softened even more, giving relatively subtle hints of texture and form. I think the sharper foreground phrags in this photo…

Critters Among the Sunflowers of Antelope Island

Antelope Island is ablaze with color this fall, provided by the common sunflower Helianthus annus. The sunflower display is really quite spectacular this year – the most prolific I’ve ever seen it. I suspect it’s because of the very wet spring we’ve had. The sunflowers can provide a very pleasing setting for wildlife photography, whether the flowers are in focus along with your subject or out of focus to show off some pleasing and unusual color in the background bokeh. Canon 40D @ 72mm, 1/800, f/6.3, ISO 320, EV +0.33 It’s unusual for me to get so close to a pronghorn that I don’t have to use a telephoto lens but these bucks are in rut right now and they’re so intent on herding their harem of females that they’re not nearly so wary of people and vehicles. So I quickly pulled out my old 40D and shot this handsome fella at only 72mm while he was right next to my pickup and staring intently at his ladies close by. This allowed me to keep many of the sunflowers relatively sharp and gave a different “feel” to the image than I usually get with my big glass. Canon 7D, 1/2500, f/5.6, ISO 640, EV + 0.33, 500 f/4, 1.4 tc In contrast to the previous image, this Vesper Sparrow was shot with my 500mm and 1.4 teleconverter (1120mm with the crop factor of the 7D) at f/5.6 which gave me very little depth of field – just enough to get the sparrow sharp but the sunflowers in the background…

Brine Fly Feeding Frenzy at the Great Salt Lake

The Great Salt Lake in northern Utah is a vital resource for many of North America’s birds. The lake is 75 miles long, 30 miles wide and has 1680 square miles of surface area and 335 miles of shoreline. Surrounding the lake are 400,000 acres of wetlands. Roughly 5 million birds of 257 species rely on the lake and those wetlands for food, sanctuary, breeding and as a migratory stopover. And one of the primary reasons the lake is such an asset for them is the endemic brine fly, Ephydra hians. Brine flies can be intimidating because of their massive numbers but they are truly innocuous. They are found only within a few feet of the shore, they don’t bite and won’t even land on humans. And they’re a huge nutritional resource for birds. In the photo above, the blurry brown bits in the background are brine flies in flight that have been stirred up by the feeding California Gull. Different bird species have varying feeding methods with these flies – this species often stakes out a few feet of feeding territory on the shoreline and then rushes through the hordes of flies on the sand, stirring them up, and then snaps them out of the air in large numbers. This bird is looking down the shoreline and preparing for its next run on the flies. Most of the flies are resting on the sand until the bird makes its run. As the gull rushes along the shoreline the flies are disturbed into the air and the bird snaps…

Birds, Lamentations And Musings From My Recent Trip To Western Montana

Recently Mia and I spent just over a week in western Montana on another camping/photo excursion. It was a trip packed with wonderful birds, breathtaking scenery, colorful characters and almost too much drama for me. We spent two days at Red Rock Lakes National Wildlife Refuge, then four days on the western Montana farm near the Canadian border where I grew up and then spent one night at Red Rocks again on the way home. In this post I’ll include a sampling of photos from the trip in the rough order they were taken. Canon 7D, 1/1250, f/5.6, ISO 800, EV +1.00, 800 f/4, 1.4 tc This Long-billed Dowitcher photo was taken at a pond on the refuge that often has many birds of good variety but it’s difficult to get good light at this location. Canon 7D, 1/2000, f/6.3, ISO 800, EV +0.00, 500 f/4, 1.4 tc This Least Sandpiper gave me a similar pose as in the previous shot but I liked the head turn and lighting better (even though it made the whites a challenge to expose properly). Canon 40D @22mm, 1/60, f/14, ISO 500, EV +0.33 Mornings at Red Rocks are often spectacular. Here the sun is just beginning to rise on a layer of ground fog with another layer of low clouds just above the fog. Roads similar to and much worse than this one were the source of the drama I referred to earlier. On this trip we had a total of four flat tires, most…

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…

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…

Tree of Death (warning – graphic!)

In late January my friend Mia and I made the drive to the Promontory area north of the Great Salt Lake in a quest for Golden Eagle photos. We did find some eagles but were definitely unprepared for what else we stumbled upon. Second warning – most of these photos are graphic and may be profoundly disturbing to some. If you proceed further in this post, please – no complaints about what you’ve seen. You have been twice forewarned. A misleadingly idyllic scene What we found was the kind of country that I love – wide open spaces, big skies, blissful silence and isolation. The setting reminded me of the area around Cut Bank, Montana where I grew up. Tree of death So what a shock it was to come around a bend in the dirt road by this little reservoir and find such a horrific scene! Someone had apparently shot two Red Foxes, a domestic cat and a Common Raven and deliberately hung them in this tree right next to the road as some sort of a sick trophy display. First Red Fox in tree This Red Fox had been hung by its neck in a fork of branches. Second Red Fox in tree This one was simply draped over a stronger branch, very close to the road and with no obstructing branches between the fox and everyone who was forced to look at it as they came around the curve in the road. Cat impaled on fence post…

The Bald Eagle and the Fish Hook

Last week while looking for Golden Eagles to photograph in the Promontory area at the north end of the Great Salt Lake we came across a group of adult and juvenile Bald Eagles feeding on a sheep carcass. The light angle was bad for photography but we couldn’t resist taking a few shots anyway. Bald Eagle with fish hook in bill We were quite close to one adult and when it flew off I instinctively fired off a few shots, despite the poor light. When I got home and looked carefully at those images I could clearly see this gold fish hook embedded in the base of the eagle’s bill. This bird was apparently feeding normally and I suspect that the hook will not cause it significant problems while it’s in Utah for the winter feeding on carrion. However I am concerned that, because of the position of the hook in front of the eyes, the hook will interfere with effective forward vision for fishing after it heads north in March. I hope it falls out or rusts off before that although I’m not sure if “gold” fish hooks rust at all. An internet search shows that fish hooks are an ongoing problem for both Bald Eagles and Ospreys. Ron

Antelope Island

Of the eight major islands in the Great Salt Lake, Antelope Island is the largest at 15 miles long and 4.5 miles wide. Frary Peak reaches an elevation of 6596 feet. The island has an intriguing history, interesting geology and free roaming herds of bison, bighorn sheep, mule deer and pronghorn, in addition to a variety of smaller mammal species and plentiful birds. It is one of my very favorite photography locations – especially for birds. In this blog post I will present an overview of the island and some of its wildlife. My next post will deal specifically with bird photography on the island. The north end of Antelope Island at sunrise as seen from the causeway access road There is a 7 mile long causeway road that provides the only access to the island, which is actually a peninsula when the Great Salt Lake water levels are low. It’s common to see a variety of wildlife along this causeway including coyotes sprinting at the first sight of an early morning vehicle, American Kestrels, Northern Harriers, Burrowing Owls, Common Ravens and a variety of waterfowl and shorebirds where the water comes closer to the causeway. Approaching the north end of Antelope Island As you get closer to the island the water comes right up to the causeway’s edge and typically there’s hordes of waterfowl and shorebirds very close to the road. In the photo above, several shoreline levels of ancient Lake Bonneville can be seen where wave action eroded “benches” in the sides of the…

Bald Eagles in Utah

Every winter hundreds of Bald Eagles migrate south from Canada and Alaska and winter in Utah. They do so because of our relatively mild winters and they are able to find sufficient food here. Typically they begin arriving in November and leave in March when the ice begins to melt. They can be found in many areas of the state but a large percentage of them winter on the wetlands surrounding the Great Salt Lake where there are a number of bird refuges and other suitable areas to accommodate them. Adult Bald Eagle in flight Each year I spend many hours at some of the Great Salt Lake wetlands photographing eagles. What attracts them to some of the refuges is fish – lots of fish, especially carp. Carp are a nuissance for wildlife managers because they root in the mud of the shallow impoundments which makes the water cloudy and unable to transmit light to the bottom. This disrupts the healthy growth of desirable plant species needed by birds so some refuges “poison” the carp, usually in mid-winter, with rotenone – a non-toxic chemical that forms a film on fish gills preventing oxygen transfer from the water to the blood which kills the carp. Then it’s feast time for the eagles. Bald Eagles and gulls on the ice It’s common to see several hundred Bald Eagles from one spot. One refuge counted 408 eagles. I’ve personally seen 150 – 200 birds on several occasions. Immature Bald Eagle with carp This is why they’re here – fish! Specifically, carp. Lots of carp…

Weather Loach in Utah – Another Invasive Species

On December 12, 2007 I photographed this Common Goldeneye with a fish at Farmington Bay Wildlife Management Area. At the time I didn’t pay much attention to what kind of fish it might be and then just kind of forgot about it. Male Common Goldeneye with unidentified (at the time) fish The moment of capture Then, on October 2, 2008, I took some photos of a Snowy Egret fishing, also at Farmington. Finally, I became curious about the unusual fish – noticing the atypical elongated almost eel-like body in particular. I made some casual inquiries of refuge personnel about fish species present there but didn’t get anything definitive that would match this fish. More time went by, then I finally showed Justina Parsons-Bernstein some of the photos and asked her about the fish. She is the Director of The Great Salt Lake Nature Center at Farmington Bay WMA and she was also curious as to what species of fish it was so she sent some of my images to a vertebrate specialist with the state of Utah. He keyed it out as a Weather Loach. It turns out that the Weather Loach or Dojo Loach as it is also known (Misgurnus anguillicaudatus) is quite a remarkable fish. The name Weather Loach comes from the fact that it is highly sensitive to minor changes in barometric pressure and when it perceives such a change its behaviour becomes erratic, active and animated. Humans have kept them captive as a weather indicator for centuries. They are a very hardy species, capable of surviving poor conditions by swallowing atmospheric…

Northern Harriers Fight to Survive Harsh Winters

Typically life is good for the hundreds of Northern Harriers who spend fall and winter in the marshes and prairies surrounding the Great Salt Lake after spending breeding season up north. Here their diet consists almost exclusively of microtine voles (small rodents resembling mice). These voles are incredibly abundant and relatively easy prey. It’s quite unusual to see a harrier even attempt to catch a songbird or anything else for that matter. Harrier hunting voles near the Great Salt Lake However the easy life takes a major turn for the worse during unusually harsh winters with intense cold and deep snow packs. During these times the voles spend most of their time underground eating roots and dried vegetation which means the primary source of food for harriers is suddenly unavailable just when they most need nourishment for warmth. And since most songbirds (their fall-back food source) have either migrated south or have already succumbed to the many American Kestrels in the region, simple survival for the harriers is suddenly very precarious. Now, out of desperation, harriers begin to go for larger prey – ducks and coots for example. Harrier on a duck kill frozen into the ice They aren’t able to take these prey often and when they do they can’t eat them quickly like they can a vole. The result is intense aggression – fighting fiercely over food. Typically I see very little true aggression(other than territorial squabbles) between harriers but all that changes when food becomes scarce. A relatively large prey item will provide multiple…

Category: Ecology and Environment