Have they, or haven't they?



Sea Eagle in flight - photo courtesy of Alan Jack

 This week we are playing the waiting game. Our egg(s) are due to hatch any time now and everytime the on-duty adult stands up on the nest, we wait with baited breath to see a tiny, wobbly white head, or the other adult bringing in food.

Yesterday afternoon the weather was superb (as it has been for over two weeks now), and the conditions were perfect for a precious Sea Eagle chick to come into the world. But the adults seemed to be just turning the eggs and then settling down to incubate again.

Maybe they could hear the first chick cheeping inside the egg as it started to break its way out using the tiny egg tooth on the top of its beak. Or maybe not! Eggs can easily take 36 hours to hatch, so, like Iona and Fingal, we must be patient and wait for that first feed!

We can't help thinking back to last year, when the beginning of May saw horrendous winds sweep the west coast of Scotland, and the eagle nests were all checked the next morning. We were convinced that at least one nest tree would have come down, but no, everything was intact and Mull's Sea Eagles successfully fledged 11 chicks in 2011.

We suffered even stronger winds over the winter months with one gust on Mull recorded at 165 mph. Surely some of the eagles would have to build new nests this year to replace those damaged? Sea Eagles are obviously better nest builders than we give them credit for as most nests survived. One nest did collapse and the following day the eagles there carried out a hurried repair job - only for the winds to return and the new nest be blown out of the tree too. But Sea Eagles are resilient birds and it's always surprising to see how quickly they put their nests together.

The new "wild hide" - photo courtesy of Alan Jack

Our new viewing hide, set into the woodland, is proving a huge success. Everyone says they feel closer to nature, and the smell from the pine trees is all-pervading. The shading at the front of the hide means that the eagles can't see us although they know we are there.

Occasionally they will hear something and if we happen to be looking through a telescope at the time we see a beady pale lemon eye staring back at us.

With luck we will soon be watching food being brought in for the chick(s) by the parents, and then tiny slivers will be torn off and fed tenderly to their offspring. I wonder if we'll have a hatching today?

Time for a Bath

After yesterday's torrential rain, with more overnight, you would think our eagles had seen enough water, but no! We arrived at the hide this morning with the first trip of the day and thankfully it was dry enough for everyone to stand outside to get the best views of the eagles.

Skye was on the nest incubating those precious egg(s), and I started to tell our visitors about the history of the White-tailed Sea Eagle in the UK, whilst they scanned the sky and trees for a sign of Frisa. Suddenly a shout went up - "Eagle" - and we all watched as Frisa flew in over the trees.

At first we thought we were going to witness a changeover as she came right over the nest and she and Skye called to one another. But she kept going and suddenly dropped rapidly over the loch. I saw a group of gulls fly up as Frisa swooped, came up and swooped again, and I thought she must be trying to catch one. For a few moments she went out of sight, then someone spotted her. She wasn't sat plucking a gull as I expected, but standing in the water at the edge of the loch having a very thorough bath!

She dunked first one wing, then the other right under the water, then crouched down flapping both wings and her tail. Then she walked onto the shore and sat preening, cleaning individual feathers with her beak.

We thought she would be satisfied with her ablutions but a few minutes later she was back in the water going through the whole process again - whilst all the time the gulls mobbed her. Once again she hopped out of the water and this time she travelled further up the bank and spent at least another half hour preening, before flying back over the loch and disappearing out of sight.

It's likely that Frisa had been hunting earlier in the morning and her feathers were probably soiled with the blood and innards of whatever she had been feeding on. Birds of prey are very fastidious about keeping their feathers clean and healthy - soiled, sticky or salt-laden feathers lose their waterproofing and the bird can chill much more quickly.

One favourite component of Skye and Frisa's diet is Fulmar - a sea bird which they catch either in flight, or pluck from its perch on the cliffs. However, the Fulmar has an unpleasant but highly effective defence mechanism - it spits a disgusting mess of regurgitated fish at its adversary! This substance is very oily and can severely damage feathers, so predators are quick to clean it off.

Although the sun didn't manage to break through the low cloud today, it stayed dry until later in the afternoon and Frisa was spotted during the afternoon trip sitting in a tree with her wings spread wide. The breeze would have quickly dried off her damp feathers, ready for her to take over incubation duty from Skye.

We had a scare today when the alarm which warns us that someone is walking, cycling or driving along the track near the nest kept sounding at our watch point, yet no-one appeared at our end of the track. The worst possible thing for the eagles is for someone (or worse still a group of people) to stop on the track to watch the nest. Incubation is such a sensitive time and it doesn't take much disturbance to put the adult bird off the nest. In this cold, damp weather the egg(s) would chill within minutes, so I jumped in the van and drove down the track wondering what on earth (or who on earth) I was going to find.

The perpetrator of the crime was none other than a harmless spider! It had woven its web across the front of the sensor, and every time it crossed the beam it set off the alarm warning us that someone was in the wood. I carefully gathered up the spider and relocated him to a nearby tree, and peace reigned again. There's never a dull moment on sea eagle watch!

The tension builds

We have had some wonderful views from our hide, and with the recent beautiful weather, our White-tailed Sea Eagles Skye and Frisa have given us some great displays.

Most of the action has been from Skye, which is not surprising since our female, Frisa, does the majority of the incubation especially now we are nearing the hatch date. On one occasion Frisa must have needed to stretch her wings because as Skye came towards the nest she took off, circled on the thermals and then flew straight over the hide. Our visitors watched breathlessly and Frisa was close enough for them to see her white tail and huge yellow beak.

Since we opened we have had plenty of visitors, and even if the eagles don't fly, Skye spends much of his time perched in a tree close to the nest, so he is quite easy to see through binoculars.

We are watching carefully for signs of food being brought to the nest; we are nearly at the end of the 38 days incubation, so are waiting with bated breath. Hopefully our next blog will contain some exciting news!