Showing posts with label preening. Show all posts
Showing posts with label preening. Show all posts

Tuesday, 20 August 2013

Time To Go


Photo by J.Lister
There is a definite autumnal nip in the air as we are approaching the end of August. Gone are the long stretched out evenings, as the daylight hours begin to shrink back. Ospreys have felt it too and most certainly the female from the main nest site is now on her way. We are not certain of the exact date that she left but she has not been seen for quite a while now.

photo by J.Lister
The male was seen regularly back at the eyrie with three of his young juveniles, feeding together but for this past week only two juveniles have been present with the male. This is hopefully a good sign that the boldest youngster has followed Mums example and headed off south to longer days and warmer climate, to escape the start of the Scottish cold season with short days.

This week a lonely juvenile osprey sat for hours on the eyrie calling and wing flicking and looking skywards. Perhaps the male bird was somewhere close by, feeding on a fish and the youngster was hopeful of receiving a meal. A second young osprey joined the first one at the nest site but appeared quite content and was preening feathers. A whole morning passed by and Dad never put in an appearance. Eventually both young birds flew off but returned later to sit and wait for Dad again. He must be feeling the need to push his remaining brood into independence. He will stay around until he sees them depart before he will also begin his long journey south to Western Africa. The impulse to migrate must be strong and certainly birds will face a better journey if they leave before autumn sets in properly with gales making passage difficult.

The river camera at Kailzie revealed a surprise visitor last week and the volunteer on duty was able to take snap shots and a small amount of video footage of what appears to be a juvenile buzzard bathing in the burn that leads down to the River Tweed.  The raptor is a chunky brown bird with streaky brown markings over buff coloured chest and belly. It was a bit difficult to distinguish what it was at first and was thought to be a sparrowhawk but after careful scrutiny it was decided that it was one of the young buzzards.

The buzzards remain thoughout the seasons and do not migrate to foreign climates. When times get tough over the winter months with snow conditions they will adopt a localised movement to better conditions and being a bird that relies quite heavily on carrion, it manages to scratch a good living for itself topping up its diet with road kill and earth worms or any other scraps. It is equally equipped for hunting prey such as rabbit or occasional birds and squirrels.

Tuesday, 3 July 2012

Home Alone Chicks Prepare for Flight



Wing Flapping to strengthen muscles.
The osprey chicks are building up to making their first flight. The majority of time in the nest is spent preening their feathers to ensure that they are in pristine condition and wing flapping with ever greater degrees of intensity. The wing flapping is a way of strengthening their muscles in readiness for flight.
It is incredible that only seven weeks ago, there were three tiny heads peering upwards from the bottom of the nest and now the three chicks are virtually adult sized and occupy all of the space in the nest and when the adults are there as well, it seems totally overcrowded.

 The male continues to deliver really big fish, the family took 45 minutes to devour a huge fish between them on Monday  and afterwards they appeared to be satisfied for a long time.

On Tuesday, the volunteers on duty did not see a fish brought in for most of the day which could be deliberate action from the male to encourage the chicks to make a first flight from the nest.  If the chicks are a bit lethargic and unwilling to test out their wings, hunger will drive them on eventually.  The chicks were left for long periods of time in the nest alone and they were unconcerned,  appearing to concentrate on more preening and more and more wing flapping.

From this time on, until the end of the osprey season in early September, it is a good time to keep a watchful eye out for ospreys in flight.  Soon all the chicks from other successful nest sites in the Upper Tweed Valley as well as the camera nest family will be flying and fishing at any suitable water bodies, including the River Tweed. So it is worth keeping a pair of binoculars to hand, when out and about and double checking any large birds of prey in flight.

If any birds are spotted through telescopes or on camera with visible ring numbers, please let us know and we can find out where the bird is from and when it was hatched out. Towards the end of the summer this becomes very useful information, as birds from further north will be passing through as well.