Possible hatching dates for ospreys and herons....

The waiting game has begun in earnest as we watch the two live screens with the heron nest and the osprey nest on camera at Kailzie Gardens Osprey and Nature Watch Centre and the osprey nest at Glentress Peel Wildwatch room. The ospreys and herons at the nest are engaged in full time incubation duties and it is fascinating to watch the behaviour and different strategies adopted by the two different species towards their nesting activities and in the rearing of their young.



Glentress Peel Wildwatch

The osprey pair at the main nest behave as a very close partnership. The incubation duties appear to be equally shared and there seem to be genuinely affectionate moments between the two expectant parents. They sidle up close together, often the male will gently nudge the female until she is persuaded to rise up off the eggs and let him take a turn at incubating.


During this period a lot of nest scraping takes place and fiddling about with sticks to move from one side of the nest to the other, possibly a way to occupy the time. It is easy to tell the difference between the adults not just because the male has the leg ring white SS but he is about one third smaller than the female and has a pure white chest, whereas the larger female has a streaked chestnut band of feathering on her chest and the markings on the back of her head crest look like a chocolate coloured concorde. 

Heron adults appear to be identical to each other, the text books tell us that the parents share incubation duties but we have never witnessed a swapping over at the nest, so perhaps this only happens infrequently. We have not witnessed any interaction between parent birds and never know if it is the male or the female that is sitting on duty. Apparently the male heron is the larger of the two but only really noticeable in wing length and beak length which is not obvious at all when they are sitting incubating. Both birds are strikingly handsome with long black head plumes and sleek grey plumage with streaked black, speckled, neck feathering. They sit motionless when incubating for long periods and often we double check that the camera is still working, when suddenly, the bird will stand and reach down to turn the three blue/green eggs.

Osprey incubation takes between 37 and 42 days and the first egg was laid on 12th April, so we can expect that the earliest likely hatching date for the first egg could be 19th May.





Kailzie Osprey and nature watch



The heron eggs were laid on 20th April, 24th and 27th April and they take 25 to 26 days to incubate, meaning that we will have live hatching on camera anytime from the 16th May. Because they have nested so late this year it will be the first time we have ever seen the heron chicks when they have just hatched. We are very excited about watching the heron chicks develop this year as we get to see the family raised right from the very start. Heron siblings behave with a great deal of rivalry and there can be many dramas, often with older siblings killing off younger ones and even eating them.



Ospreys have never displayed such behaviour in the nest in the ten years that we have watched this family. The parents are very attentive to their young whereas the heron parents have a very different approach, delivering food and leaving the chicks for long periods in the nest alone.

The camera nest box became occupied with a blue tit nest building very early in April and then all activity seemed to come to a halt. The warm sunny weather seems to have kick-started the nesting imperative and the blue tit has been seen actively nest building again, although we have not seen any eggs yet. It would appear that the cold snap has caused the blue tit to delay laying which is good because they need to wait until there is a plentiful supply of caterpillars to feed any young. Last year they were caught out by laying early and the wet weather meant there were no caterpillars. We watched as one chick after another starved and the sad image of the blue tit removing dead nestlings is hopefully not to be repeated this year. Populations do fluctuate due to seasonal variations but over time should even out.

Growing Chicks are now wing stretching.



Young ospreys play dead



The osprey chicks have survived the worst that the good old British weather has managed to throw at them and it was really heart - warming to see relaxed and healthy large chicks in the nest yesterday.

Tensions seem to have eased between the siblings too, and the youngest chick has apparently regained an appetite. The male bird with white leg ring SS continues to exploit his fishing source and is bringing in lovely big trout to feed the young brood.

Plenty of relaxed wing stretching was witnessed at the nest today and this is a good sign as the youngsters flex their muscles and develop their bodies in preparation for flight which will only be a couple of weeks away now.

Ringing the young chicks will be taking place shortly under licence with Tony Lightley, the Forestry Commission Scotland Conservation Manager and his team of helpers.

This will involve accessing the nest and removing the youngsters to fit their legs with Darvic ring and BTO ring so that we can gain an insight into their distribution once they have left the nest. Sightings of the large Darvic rings with the coloured background and lettering can be used to trace the origin of birds seen.

This year so far we have received news that Tweed Valley raised birds have appeared at Leighton Moss, and Tweed Valley osprey with blue Darvic leg ring ‘HF’, turned up at Dyfi Opsrey Project in Wales on 4th June - probably trying to get a spot of stardom on Springwatch!

Tweed Valley-raised chicks dispersing around the country is superb news for us, as it is so good to know that birds are returning after successful migration journeys.

Keep up to date with our ospreys progress and view images on the new FCS facebook page

Twitchy Ospreys await the day

 

One of our ospreys guarding the nest

The soon to be parents are becoming a little restless, they are old hands at this family game and have raised 8 broods of chicks to date, with this year being their ninth brood.

So understandably they must realise that the time is very close now for hatching out their first 2012 youngster.
We are hoping to have this years first hatched osprey chick in Scotland too, so hurry up parents and incubate those eggs!

Today on the nest the male brought a huge fish in to eat and this became a shared meal.



Our male osprey brings home the dinner

The backdrop of forest sounds was delightful as a song thrush has taken up residence close by and was practising his triple song phrases with gusto.

We are expecting hatching soon and as there is news we will post it on the blog and via our twitter feed.

Nine years of watching this osprey pair raise their family and yet the excitement at hatching time never fades.

They are magnificent birds and we are all looking forward to see how many chicks they will have.

Male Osprey taking on his role as "Man of the nest"



One of our Ospreys incubating at the nest

 Things are going really well for our parents to be in Tweed Valley.

The pair have spent the first part of the incubation season going off to hunt for themselves and then taking it in turns to incubate the eggs.

They seem to have a system all worked out and operate a rota which keeps the whole egg incubation period running as a slick operation.

Things have changed this week though - a slight shift in behaviour - the male (White leg ring SS) has started to hunt for his lady!



Female osprey sets of with
our male's latest catch



He has been spotted bringing in headless fish and delivering the substantial body to

the female at the nest.

He must be catching the fish, then perching up close by and feeding on the nutritious brains before passing his bounty over to the female once she is ready for a swap over at the nest.

She takes the fish and flies off with it while he settles down into a spot of incubation duty.

Signs of a great team at work as we edge closer to the appearance of some new chicks.



Heron's lead the way with hungry chicks

Adult Heron feeding chicks

Lots of activity on the heron cam with a full nest. Today we saw the adult heron flying onto the nest, greeted by two hungry chicks who began to tap the adults beak with their own beaks. The adult was then forced to regurgitate its food into the beak of the hungriest chick.

The pond camera is showing the tadpoles free swimming in the little pond outside the centre at Kailzie, whilst the blue tits are out and about feeding up in readiness for the long incubation. The eggs are covered when the female is out and she will begin to incubate once the clutch of eggs is complete.





Incubation time for our ospreys

Male and female ospreys on the nest yesterday

The camera was working again today and we are relieved that the technical teething troubles seem to be getting resolved .

The High Definition images on the live nest today revealed that the male was incubating a mystery number of eggs. He was in the nest for a considerable time before the female returned and encouraged him to move over, so that she could take her turn to incubate.

We cannot see the eggs, but the expectant parents are turning and moving them, scraping deep down into the nest cup, which takes them further from view but is doing a good job of keeping the eggs safe and warm.

The new equipment allows us to take pictures and video clips of the nest which we will update on the blog and web pages.

The quality of the nest pictures really shows just how good the new equipment is. We hope to have any initial issues sorted soon so we can bring you top quality images throughout the viewing season at the Osprey Watch Centre .

Tweed Valley Ospreys land on Twitter

With an already avid blog following for the Tweed Valley Osprey Project, we are happy to announce that you can now follow all the updates and goings on at the two viewing centres and nest sites via our brand new twitter feed.

You can follow Tweed Valley Ospreys on twitter @TweedOspreys