Archive for August, 2009

A lot of osprey sightings?

Tuesday, August 25th, 2009

Our ospreys have still not been seen on the nest but there have been quite a lot of sightings of ospreys on the loch over the last week so it is uncertain whether or not ours are still around. Adult and juvenile ospreys have been spotted flying and fishing on the loch and on Friday, what appeared to be a very inexperienced juvenile, was watched trying to fish in front of the hides. Instead of diving down when it spotted a fish, it slowly glided down to the water then dived at the last minute. It did this on four occasions before finally giving up and moving on.

Although no ospreys have been seen on the nest we have seen a few other interesting sights. We have some nice footage here at the Loch of the Lowes from Friday of a juvenile woodpecker hanging upside down from one of the pine cones where it pecked away for a short time before another woodpecker came and chased it away. Also on Saturday a red squirrel was watched running around in the nest before scurrying off back down the tree. The red squirrels can also be watched from the viewing window burying their nuts preparing for the winter setting in.

We have a little shrew which has taken up residence between the female toilets and the store room and is regularly seen running through the grates hunting for food. Goldeneyes and pochards have also returned to the loch after travelling down from the north for the oncoming winter so the loch is getting busier than during the summer breeding months.

Volunteers and staff are currently in the process of upgrading an artificial otter holt in attempt to make it more suitable for otter use as it was regularly becoming flooded in the winter. When it is finished we are planning on fitting it with a camera so hopefully you will be able to see otters regularly running in and out of the holt.

Left for their wintering grounds

Friday, August 14th, 2009

We have not seen the osprey chicks or the father since yesterday morning which is leading us to believe that they may have left for their wintering grounds in equatorial West Africa.  It will take them about a month to get to their wintering grounds and it will be a very dangerous journey for the juveniles who have a higher mortality rate during their first migration.

Even though our ospreys may have left I thought I would take this opportunity to tell you about a story I was given about an osprey and a great crested grebe at Blatherwycke Lake in Northamptonshire.  The osprey visited the lake in early August to hunt, but this day took an unexpected twist. The osprey dived into the water for a fish and came out with non other than a great crested grebe.  Understandably the grebe was not amused by its attack from the osprey and was squawking and flapping about desperate to get away, mottling several of its feathers in the process. The osprey quickly released the grebe which dived back under water in a desperate attempt to get away and the osprey went back to hunting for fish completely unperturbed by its catch. Whether the osprey mistook the submerged great crested grebe for a fish due to its streamlined body we will never know but I am sure the grebe will always be wary from now on when its dives under water when an osprey is overhead!

The mother osprey has finally left

Monday, August 10th, 2009

It appears that the mother osprey has finally returned back to equatorial West Africa. We believe that she left last Wednesday (5 August) as she has not been seen by any member of staff here at the centre since then. This is normal for the mother to leave around three weeks after the chicks fledge as she is no longer required to feed or protect the young.

Some viewers have requested an easy way of identifying which juvenile is on the nest. We have come to distinguish them from their size and the markings on their head. The youngest chick appears to be the largest and the brown markings on its head are a lot more splayed than the older chick whose brown patch is more of a barred shaped. The youngest chick also spends the most time on the nest and makes the most noise which, combined with the size, suggests that it is likely to be a female but it is hard to be certain.

Now that it has been over three weeks since the chicks fledged they will be getting alot more adventurous when they fly, using thermals and soaring through the sky. In another two to three weeks, when they reach about 11 or 12 weeks old, they too will also be ready to migrate to Africa for their first experience of seeing and living in their wintering grounds. This is usually done during a period of good weather and can take about a month to get there. It is a very risky trip for juveniles as this is when the highest mortality of fledglings occurs as they are at risk of flying off course and finding themselves out in the sea. Because the oldest chick is now hunting for itself, it relies less heavily on dad and will probably leave a lot sooner than the youngest chick.

As well as deer and the wide variety of birds seen on the reserve we have also had the opportunity to see the otters swimming on the loch at around 4 pm on last Friday. It is always lovely watching them swim past the hides within a few feet of our budding wildlife watchers. The kingfishers are also starting to make an appearance on the loch now that the breeding season has past so there is always plenty to see here.

Eventful week here with the ospreys

Monday, August 3rd, 2009

We have had a very eventful week here with the ospreys. Whilst out in the canoe on Thursday evening monitoring the reserve, we spotted what we thought was probably the male getting repeatedly attacked by a gull. The osprey did not even bat an eyelid at this aerial attack and continued staring into water surface looking for a tasty meal. When the attack got too much, the osprey retreated to find a quieter area to hunt. The osprey returned on several occasions and each time was met by an aerial attack from the same gull no matter how far away the gull was when the osprey made an appearance. At one point we heard the gull yelling from half way down the loch where it made a beeline straight to the top of the loch where the osprey had just appeared over the tree line so the gull appeared to be spending its whole time watching for the osprey’s return.

Friday was an even more eventful day but for the chicks this time. We have video footage of the ospreys fighting very aggressively on the nest. One of the juveniles was on its siblings back pecking it repeatedly and grabbing it by the neck, pulling it with all its might. The other juvenile finally gave in and flew off the nest leaving its sibling feeling very smug about its defeat. This is normal behaviour for ospreys as it is their way of saying ‘this is my nest so get off’. The juveniles also regularly fight over fish which has been brought in the nest so it is not uncommon to see them laying into one another.

We also have footage from Friday of one of our chicks getting dragged off the nest by the father. The father arrived at the nest with a fish which the juvenile appeared to try and take hold of but we think it may have grabbed hold of dad’s talons instead. The male took off with the juvenile still attached and dragged it over the edge of the nest. Thankfully the juvenile was not hurt and arrived back on the nest after several minutes. It must have been clinging onto the nest for dear life as when it returned it was clinging to a stick. The shock of falling out of the nest also seemed to make it forget how to open its talons as it acted like the stick was stuck to its foot before realisation dawned on it and it opened its talons and let it drop.

Juvenile osprey with fish © Neil MacDonaldAfter saying in the previous post that it is very rare for juveniles to hunt at this stage and before they leave for Africa, one of our juveniles did the unthinkable and was spotted catching a fish on Sunday. This would have been spectacular to see and a few lucky spectators also managed to take photos of this fantastic event. This photo of the juvenile with a fish was kindly sent in by Neil MacDonald who has also very generously let us post it on the web for everyone to see. Thank you again.

In other news, if you have noticed wire mesh on the cameras of the bird feeders, it is actually a pen to try and keep the mallard ducks out since they can no longer fly at the moment. This is because they are going through an eclipse where they moult all of their flight feathers at once. You may also notice at this time of year it appears that all the male ducks have gone. This is not the case. The males actually lose their breeding feathers and take on the colours of the females. The ducks have been secluded to try and encourage grass re-growth below our bird feeders because the ducks have not only eaten all the grass or pulled it out whilst looking for seeds, they have also exposed tree roots with their constant trampling. With any luck the grass will soon regenerate and the ducks will be discouraged from coming to the feeders.