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Aeron flies the nest - for the last time?

Posted: Tuesday 15th August 2017 by Karis MWT

MWT - AeronMWT - Aeron

Don't ospreys read the textbooks?

Those of you that have visited us, read previous blogs, or followed our Facebook page will know that the scripted order of osprey migration goes as follows:

     Female first

     Chicks; eldest to youngest

     Male last

In previous years we have seen some exceptions to the rules.

In 2011 we watched on as Monty left Leri and Dulas behind, hanging around the nest until hunger ultimately forced them to migrate; the tough love approach worked.

In 2015 we know that eldest chick, Merin, left 2 hours and 2 minutes before Glesni, and also saw Brenig, the youngest chick, migrate two days before his older sister, Celyn. Clearly these youngsters hadn’t been reading the textbooks!

This morning we have seen Menai and Eitha. Aeron, however, is still nowhere to be seen.

One of the final photos of Aeron
MWT - Aeron

Having meticulously checked through recordings, we know that he has not returned to the nest since he left at 08:23 on Sunday morning. We were somewhat dubious to call it, however, knowing that fledglings often start to roam further from the nest prior to their departure; Menai was absent for almost 9 hours on Saturday, returning only when hunger got the better of her.

Over 48 hours have now passed since we saw Aeron, and we are almost certain he has left for good.

Aeron taking flight as his sisters look on
MWT - Aeron

Many people have expressed their concerns given that he left before Glesni; assuming he left too early, before he was ready. The graph below shows the ages of all previous Dyfi chicks at the point we last saw them. Aeron was younger than average for the males, but over two days older than Cerist, our current record holder. 

Though Aeron is the youngest male chick to migrate, he only beat the record set by Gwynant in 2014 by 16 minutes!
MWT - Migration graph

Attention now turns to the girls. We haven’t seen Glesni since 17:20 last night (14th August), which is unusual for her and definitely raises our suspicions that she has started her long journey south.

With the exception of Clarach and Cerist in 2013, all previous female chicks have waited until they were at least 84 days old. Today, Menai and Eitha turned 85 and 81 days old, and have both been seen on more than one occasion. 

The two sisters remain on the Dyfi, still being fed by Monty.
MWT - Eitha and Menai

The weather is looking slightly more unsettled towards the end of the week, with stronger winds and more rain forecast. Maybe this prompted Glesni to leave, using age and experience to plan her departure?

Given the four-day age gap between the two remaining girls, Menai will probably be the next to go, or will she also defy the osprey 'textbooks'?

Time, as always, will tell.

Read Karis MWT's latest blog entries.

Comments

    Thank you for a great blog, really infomative about the migration of Ospreys.  Stay safe Aeron.  We will miss our Ospreys so much but what an amazing season we have had here and elsewhere in Wales, plus Clarach and her boys in Aberfoyle.  Sad times over at Loch Garten but hopefully they will see success next year. Fantastic work as usual by everyone at DOP.  It's so great to feel so involved with the lives of these Ospreys.  Will be visiting for the last time Bank Holiday if there are any Ospreys left by then! 

    Friday 18th August 2017
    by Chrisi Burns

    Another wonderful blog Karis. Beautiful images and excellent stats.  I think the close-up of Aeron could  possibly  be a contender for the 2018 calendar?  It's been a great privilege watching the three chicks grow up this year and all the other goings-on on the nest.  Time flies by too fast. Thank you so much.  Good luck Aeron , Glesni and eventually  Menai, Eitha and Monty.  Safe travels. 

    Wednesday 16th August 2017
    by leigho

    Very informative and interesting blog, wonderful photos, especially the portrait pic of Aeron. May he accomplish his first migration safely and return to Wales/the UK when time is due. Thank you Karis

    Wednesday 16th August 2017
    by Whitefeather

    everything seemed so early this year,its been a brilliant one for the Dyfi Ospreys, 3 beautiful chicks and constant supply of fish,what a privilege to witness it all.Thank you all  

    Wednesday 16th August 2017
    by maryb

    My first year of watching Ospreys - and my first migration. Thanks Karis for the great summary, photos and stats. Good luck Aeron.

    Wednesday 16th August 2017
    by Jo W

    Thank you Karis. May he fly safely .

    Tuesday 15th August 2017
    by Mike Simmonds

    Brilliant Blog Karis, wonderful photo's. They are always rewriting the book!. Fly safe Aeron.

    Tuesday 15th August 2017
    by Jan Ellis

    Thanks Karis, lovely picture of the girls.

    Tuesday 15th August 2017
    by Jo Rihan

    Excellent blog Karis. Nice clear and meaningful data analysis. The sort that does really add to our understanding of ospreys.  These three juveniles are in such wondereful condition for the long journey south. Let us hope we see them around June 2019 

    Tuesday 15th August 2017
    by Tiger

    Excellent blog Karis. Nice clear and meaningful data analysis. The sort that does really add to our understanding of ospreys.  These three juveniles are in such wondereful condition for the long journey south. Let us hope we see them around June 2019 

    Tuesday 15th August 2017
    by Tiger

    Thanks Karis. Lots of super information and great photos.

    Tuesday 15th August 2017
    by F1Annie

    Thanks Karis - great blog and choice of pictures :)   

    Tuesday 15th August 2017
    by Rann

Thank you for a great blog, really infomative about the migration of Ospreys.  Stay safe Aeron.  We will miss our Ospreys so much but what an amazing season we have had here and elsewhere in Wales, plus Clarach and her boys in Aberfoyle.  Sad times over at Loch Garten but hopefully they will see success next year. Fantastic work as usual by everyone at DOP.  It's so great to feel so involved with the lives of these Ospreys.  Will be visiting for the last time Bank Holiday if there are any Ospreys left by then! 

Friday 18th August 2017
by Chrisi Burns

Another wonderful blog Karis. Beautiful images and excellent stats.  I think the close-up of Aeron could  possibly  be a contender for the 2018 calendar?  It's been a great privilege watching the three chicks grow up this year and all the other goings-on on the nest.  Time flies by too fast. Thank you so much.  Good luck Aeron , Glesni and eventually  Menai, Eitha and Monty.  Safe travels. 

Wednesday 16th August 2017
by leigho

Very informative and interesting blog, wonderful photos, especially the portrait pic of Aeron. May he accomplish his first migration safely and return to Wales/the UK when time is due. Thank you Karis

Wednesday 16th August 2017
by Whitefeather

everything seemed so early this year,its been a brilliant one for the Dyfi Ospreys, 3 beautiful chicks and constant supply of fish,what a privilege to witness it all.Thank you all  

Wednesday 16th August 2017
by maryb

My first year of watching Ospreys - and my first migration. Thanks Karis for the great summary, photos and stats. Good luck Aeron.

Wednesday 16th August 2017
by Jo W

Thank you Karis. May he fly safely .

Tuesday 15th August 2017
by Mike Simmonds

Brilliant Blog Karis, wonderful photo's. They are always rewriting the book!. Fly safe Aeron.

Tuesday 15th August 2017
by Jan Ellis

Thanks Karis, lovely picture of the girls.

Tuesday 15th August 2017
by Jo Rihan

Excellent blog Karis. Nice clear and meaningful data analysis. The sort that does really add to our understanding of ospreys.  These three juveniles are in such wondereful condition for the long journey south. Let us hope we see them around June 2019 

Tuesday 15th August 2017
by Tiger

Excellent blog Karis. Nice clear and meaningful data analysis. The sort that does really add to our understanding of ospreys.  These three juveniles are in such wondereful condition for the long journey south. Let us hope we see them around June 2019 

Tuesday 15th August 2017
by Tiger

Thanks Karis. Lots of super information and great photos.

Tuesday 15th August 2017
by F1Annie

Thanks Karis - great blog and choice of pictures :)   

Tuesday 15th August 2017
by Rann