Tag: bald eagle

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…

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Bald Eagle Eating a Fish in Mid-air

I’ve often seen Bald Eagles carrying fish but never one actually consuming the meal while flying.  Until yesterday, when I got some photos of the behavior.  Thanks to Mia for calling my attention to it or I may have missed the whole thing.   Eating carp in flight At first I wondered if this eagle was only killing the carp with a lethal bite as I have seen other raptors do in-flight, but then I remembered that it was already dead when it was picked up by the eagle.  These fish were killed by refuge personnel (they use rotenone) in order to prevent damage to the wetlands done by these invasive fish.      Falling fish scales  The four photos in this sequence are in the order that they happened.  Here you can see scales and debris falling from the carp as the eagles very sharp bill does its damage.     Part of the head, including gill flap (operculum) being torn off  I suspect that the reason this eagle chose to consume at least part of its meal in flight has to do with competition.  There weren’t many fish available and lots of hungry gulls and eagles to squabble over them.  If an eagle tried to eat a fish on the ice (the ponds were mostly frozen) other birds would usually challenge them for the meal.  Even gulls were at times very aggressive toward the eagles.  On several occasions I observed gulls biting the tails of the eagles while both were in flight.  Perhaps this eagle figured it had…

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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

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Bald Eagle Serendipity

  This is another blog post that will be more about the experience of the photographer than about the quality of the images. My good friend Mia and I spent two days this week looking for eagles – both Bald Eagles and Golden Eagles.  We found several of each species but it was a frustrating experience – driving large distances (over 500 miles) and then having bad light, bad luck, bad timing and lots of fog.   Then, an unexpected surprise!   Bald Eagle waiting for us to get home Immediately after getting home I noticed several neighbors down the street looking up in the direction of the large elm tree in my side yard.   I ignored them at first but they persisted in staring so I followed their gaze and couldn’t believe what I saw toward the top of the tree – an adult Bald Eagle!  I live in suburban Salt Lake City and have never seen an eagle in my neighborhood in almost 25 years.   Of course, both Mia and I got out our photo gear and spent the next hour or so photographing the bird.  It was challenging to get good images because of the steep angle and the fact that the eagle was buried in the tree with branches in front and all around.  There were a few angles where we could get an almost unobstructed look at the bird but even then the background is very busy and there are shadows on the eagle.      Wing stretch The eagle was very relaxed in our presence, even…

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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…

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