Jun 17th by Ian under Bird Watching

Tags:

For reasons unknown the Ospreys have deserted, they had a late start the female was a new one, there had been hassle from another pair of Ospreys but the female had settled down and I considered all was well, I holidayed for a week in Orkney and on return had an email saying the Ospreys had deserted. Today the 17th I managed to get out and confirmed there is no sign of the Ospreys. I did see one fly downriver with a flat fish but he was heading further East. I suppose there is no need to build a frustration nest as the nest is intact, perhaps the eggs are broken from an immature female taking fright and not retracting her talons, who knows? She had baler twine around her left foot perhaps that was her downfall getting it caught? I however am watching a successful Marsh harrier nest, this is the third attempt in this reedbed so good news. Chiffchaffs are still singing as are wrens and blackcaps, heard a few bars from a sedge warbler and not a cheap from reed buntings,  yellow hammers or willow warblers. I usually associate swifts with their calls but I have noticed at times that they don't call when feeding over the houses, today at about 7.00 am there was some ten birds obviously feeding over fresh water, the river Tay, but all completely silent. So what makes them mostly call in urban areas ?

3 Responses to “Osprey diary 5, 2018”

  1. Ian June 21, 2018 at 2:24 pm

    One reason for desertion that never occurred to me is egg theft, when the juvs from this nest are ringed the BTO boys use a ladder to start the climb. If this was employed it would be at night as during the day there is no escape from a dead end road if a ladder toting vehicle was spotted.

  2. Ian June 21, 2018 at 2:33 pm

    The successful harrier nest may be a wrong conclusion, from 8 man hours observation, 4 hours with two observers, the pair nest build but leave the nest for up to 2 hours, no food is seen delivered and both birds hunt. The female would not leave eggs or young birds for two hours as they need protection. If the young are old enough to flee into the reeds if threatened then they are not being fed enough. If there are no eggs or young why are the birds still bonded and nest building?

  3. Ian July 10, 2018 at 4:17 pm

    see osprey diary 6, there was chicks and I suspect the female could enter the nest site unseen from a tree lined backing, so the 2 hours leave period may not be correct.

Leave a Reply to Ian

Allowed tags: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>

© 2018 Materials Man - All Rights Reserved

Perth Web Design - Free Web Host