June, 2010

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Glaslyn osprey diary

Follow the fortunes of a pair of ospreys breeding near Porthmadog in north Wales.
  • Ringing / Modrwyo

    There was a buzz around the osprey visitor centre last Wednesday as plans were made for the three newest welsh ospreys to get their rings. Amazingly, the screens were only off for just over an hour and there was a lot of excitement as visitors looked through the scopes to spy on the 80-foot high nest, which had to be climbed by the BTO person. The parent birds were doing some marvellous displays above the nest and calling to the chicks to lay still and let their superb camouflaged plumage keep them hidden. The chicks were lowered to an efficient ringing team, which got them back to the nest in quick time, and within four minutes mum had returned to check her young were ok.
    The chicks are now sporting white rings with black numbers; 92,93 and 94.


    Roedd ‘na su o gwmpas nyth gweilch y pysgod dydd Mercher diwethaf wrth i’r cywion gael eu modrwyo. Roedd y sgriniau teledu wedi eu troi i ffwrdd am dros awr, ac roedd ymwelwyr yn edrych drwy delesgopau ar y goeden 80 troedfedd o uchder, wrth i berson o’r BTO ddringo’r goeden a modrwyo’r cywion. Roedd y rhieni yn arddangos yn dda wrth ben y nyth ac yn galw i’r cywion i orwedd yn dawel ac i guddio. Cafodd y cywion eu gostwng i dîm fodrwyo effeithlon a'u rhoi yn ôl yn y nyth mewn amser byr - o fewn pedair munud daeth y fam nol i’r nyth i checio bod y cywion yn iawn.
    Mae’r cywion yn dangos modrwyon efo rhifau du 92, 93 a 94. 

  • male or female?

    In answer to Jillian's questions about he sex of the chicks, we believe 92 and 93 are both female and 94 is male. 92 and 93 weigh more and have larger wings and are therefore believed to be both females – this is common with birds of prey, with females being larger than males. There is no difference between the male and female colouring at this stage of their life, as they are relying heavily on camouflage to hide them from potential predators. I hope this helps? If you have any more question please post them up and I’ll try my best to answer them as soon as I can. Thanks

  • Half term goings on / Digwyddiadau hanner tymor

    The osprey family enjoyed the hot weather over half term week, and as their not burning as much energy to keep warm, dad is taking it easy from fishing and only catching a handful a day for the whole family. The oldest chick was three weeks old on Saturday and already has the face marks of a teenage osprey. They are getting very curious of the boundaries of their nest and enjoying the breeze, only a month now until they start thinking of flying on that breeze! The youngest is still pushing its way for food, and squabbling with its older siblings for the shady spots under mum.

    The Glaslyn osprey nest has had quite a few visitors in the form of other ospreys in the area. On Sunday, a big white male was seen swooping above the nest, and while the Glaslyn male chased the intruder away the nest was visited by a second strange osprey. There is a chance these individuals are young from previous years, but no one has glimpsed a ring as yet – this is exciting news for the osprey population of Wales! Below is a photograph of the three chicks "playing dead" while mum watched out from above the camera.

    Gwnaeth teulu gweilch y pysgod mwynhau’r tywydd poeth dros wythnos hanner tymor, a gan nad ydynt yn llosgi gymaint o egni i gadw’n boeth ar hyn o bryd, mae’r tad dim ond yn pysgota am nifer bychan o bysgod ar gyfer y teulu cyfan. Roedd y cyw hynaf yn dair wythnos oed dydd Sadwrn ac yn dechrau dangos marciau gwalch y pysgod hyn. Mae’r cywion yn chwilfrydig iawn ac yn mwynhau'r awel wrth ffin y nyth. Dim ond mis sydd nes bod yr adar yn dechrau hedfan ar yr awel! Mae’r cyw ifancaf dal i wthio am ragor o fwyd ac yn cwympo allan efo’i brodyr / chwiorydd hŷn am y mannau cysgodlyd o dan adain y fam.

    Mae llawer o weilch y pysgod arall wedi bod yn ymweld â’r nyth yng Nglaslyn. Ar ddydd Sul, gwelwyd gwryw mawr wyn yn hedfan o gwmpas y nyth, a tra gwnaeth gwryw gwalch y pysgod Glaslyn ei erlid, wnaeth gwalch y pysgod arall ymweld ar nyth. Mae rhai pobl yn meddwl mai gweilch y pysgod ifanc o flynyddoedd canlynol ydi'r rhain, ond does neb wedi gweld modrwy o unrhyw fath ar yr adar eto - mae gweld yr adar yma yn newyddion a calonnog i weilch y pysgod Cymru! Isod mae llun o’r tri chyw yn y nyth yn ‘chwarae’n farw’ tra bod y fam yn gwylio’r ymwelydd wrth ben y camera.