I spotted this adult Red-tailed Hawk perched on the side of a hill and hoped to get some take-off shots as it lifted off and then perhaps some full flight images. I always try to anticipate direction of take-off in this type of situation and I was pretty sure it would lift off to my left in the direction it’s facing. But I was wrong…
As we go into prime “eagle watching” season here in northern Utah I thought it might be timely to present a guide that would be helpful in aging Bald Eagles as they progress through the 5-6 year process of becoming adults. Many of these younger birds are mistakenly identified as Golden Eagles by the general public. Eagles that have not reached the adult stage are referred to as immature, juveniles or sub-adults. Plumage stages are highly variable, depending on molt sequence, age and timing so other factors like iris and beak color are also taken into account when estimating age. Eyes gradually change from dark brown to yellow while the beak goes from blackish-gray to yellow. 1/4000, f/8, ISO 500, 500 f/4, not baited, set up or called in The adult Bald Eagle is unmistakable with its distinctive bright white head and tail contrasting with the dark brown body and wings. 1/200, f/6.3, ISO 800, 500 f/4, 1.4 tc, not baited, set up or called in But juveniles present very differently than adults, especially in the early stages of development. This very young bird is barely fledged and was still hanging around its nest in sw Montana. Notice that the plumage is dark brown throughout, though they may have some white or pale mottling at this stage – especially on the underparts. Both eye and beak are very dark. 1/2000, f/6.3, ISO 500, 500 f/4, 1.4 tc, not baited, set up or called in This is a first year bird during winter. 1/800, f/8, ISO 500, 500 f/4, natural light,…
For the last few days there have been two Snow Geese along the causeway to Antelope Island – an adult and a juvenile. This species nests on the arctic tundra and is in the midst of migration to more hospitable climes for the winter. Parents stay with their young through the first winter and families generally don’t break up until they reach their breeding grounds the following spring. 1/500, f/7.1, ISO 640, 500 f/4, 1.4 tc, natural light When we relocated these two birds yesterday morning (we’d also seen them two days before) the sun had not yet cleared the elevated causeway road so the birds were still in shade. I include this image so adult and juvenile can be compared and so that you can see the dramatic changes that occur when the warm, early morning light advances on the birds. 1/640, f/6.3, ISO 500, 500 f/4, 1.4 tc, natural light Here, the light has just reached the head and neck of the adult. 1/640, f/6.3, ISO 500, 500 f/4, 1.4 tc, natural light A few seconds later it has advanced to the feet but not to the ground. It was interesting to watch the light move down the bird. 1/2000, f/6.3, ISO 500, 500 f/4, 1.4 tc, natural light I didn’t get a lot of action out of either bird – this yawn from the juvenile… 1/1000, f/6.3, ISO 500, 500 f/4, 1.4 tc, natural light and a wing and foot stretch was about the only “excitement”…
Our recent trip to the Centennial Valley of sw Montana lasted 6 days. On the last morning, only an hour or so before we had to leave, we found these cooperative adult Red-tailed Hawks. I couldn’t believe our luck – warm, early morning light coming from the right direction, a clean natural perch, an interesting and varying background with clouds and blue sky, they allowed us close to them for over 20 minutes and there were two of them! 1/800, f/9, ISO 500, 500 f/4. 1.4 tc When we first found them they were perched together. I strongly suspect they’re a mated pair (though I don’t know that unequivocally) since they’re adults and many Red-tails stay paired year-round. 1/1250, f/7.1, ISO 500, 500 f/4. 1.4 tc The two birds stayed together on the perch for almost 10 minutes as we photographed them and then one of them flew off. 1/1250, f/7.1, ISO 500, 500 f/4. 1.4 tc The hawk left behind immediately decided to occupy the vacated perch… 1/1250, f/7.1, ISO 500, 500 f/4. 1.4 tc and did so for some time. 1/500, f/7.1, ISO 500, 500 f/4. 1.4 tc But the bird that flew off landed in a nearby conifer and immediately had to contend with a pair of very aggressive and persistent American Kestrels. 1/1600, f/7.1, ISO 500, 500 f/4. 1.4 tc Soon the kestral-harrassed hawk returned, only to find its preferred perch already occupied. 1/1600, f/7.1, ISO 500, 500 f/4. 1.4 tc There was some…
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…
