I cannot possibly tell you what joy – sheer joy – the Port Lincoln Osprey nest has brought to me this year. There is a huge lesson in that statement. The biggest one is: Do not let something that happened on a bird nest in a previous breeding season deter you from returning to that nest. There are so many different factors that impact a season from the time the eggs are laid to the chicks fledging.
These factors can be as simple as the weather – and we all know that weather is not simple. Chicks can die on a nest from cold damp or extreme heat. They can also thrive, of course. A parent might be injured or die. This year Aran, the male at the Glaslyn Nest in Wales, was injured in a territorial battle and could not provide fish for his family. At the same time, the Glaslyn Valley was hit by a bitter wet storm that lasted days on end. The three chicks of Aran and Mrs G perished. Aran and Mrs G survived through the generous donations of fish on a feeding table. Some eggs are thin and break easily due to lingering DDT in the area even after it has been banned for 50 years. Food supplies can shift. Predators. The list is long including the gender of the siblings on the nest and the number of days between hatches.
I disliked Solly so much last year after Tapps died of starvation that – well, it was hard for me to return to the Port Lincoln nest. The history of the nest told me that the likelihood for another siblicide event was acute. Many of you felt the same. My need to witness and try to understand the survival of third hatches, ultimately, compelled me to return to the PLO barge.
What then are the adjectives to describe the 2021-22 Osprey breeding season at the Port Lincoln barge? Beautiful. Serene. Delightful. Joyous. Come on, you can help me! It certainly was enlightening and instructive. It will also be unforgettable for all the right reasons.
It is possible to do a full scale analysis of weather, wind, fish deliveries, etc. Port Lincoln keeps all of the information on a myriad of events on the nest and everything could be fed into a computer. A really quick glance of fish deliveries tells me that this year is pretty comparable to last year. Certainly Mum and Dad didn’t change their behaviour. Is it possible then that it comes down to the time between hatches and the gender of the nestlings? Does it have anything to do with how the third hatch presents itself to the oldest? I don’t yet know the answer to those questions but, I am hoping to have more insights after another decade for collecting data. For now, I just want to celebrate the achievement of this nest. Three fledges! A first for them. Well done.
Let’s go back in time – almost four months ago. This video clip is a feeding from 16 September.
This feeding is 6 November, not quite two months later.
This year, on the Port Lincoln Barge, Ervie is the ‘main man’. Hatched 51 hours after Bazza, the oldest, Ervie did not have the challenges that many third hatches have. He was not that smaller than Bazza after several days of eating. We still worried because Bazza was picking on Ervie. Ervie, however, didn’t take it. He refused to be submissive or lose his place at Mum’s beak. Indeed, he insisted that he was the first fed!!!!!! Talk about an attitude. I openly admit to adoring this bird for his spunk, his confidence, and determination. Yes, I really do believe that there are some birds that are more confident than others – just like humans.
When it came time to measure, band, and put a satellite pack on the back of one of the three, everyone believed that it would go to a male bird so that the data could be compared to that provided by Solly’s tracking. Did they think there were three males on the nest? I wonder. Someone must have decided then that if all three were male, the biggest would get the tracker. That morning Ervie weighed the most. Ervie, who came from third to be the dominant bird on the nest, got the sat-pak. It really was an inspired choice.
A few days ago we worried because Ervie spent the night and the next day on the nest with his head held down. Granted it was very windy and having noticed the others doing this, that behaviour was not worrisome. But Ervie – all night and day on the nest??!! I have now joked about there being a kind of rota chart for nest time.
For a couple of days after Ervie spent all that time on the nest we didn’t really see him much. He flew in around 13:00 yesterday and, typically, with his arrival, chaos ensued. Ervie enjoyed the last fish of the day before spending the night sleeping on the nest.
When Ervie woke up in the morning, Dad delivered the breakfast fish – and because Ervie was on the nest, he got it. It was 07:02. Falky would have liked it but he stayed on the ropes.
Ervie also got the 09:36:52 fish delivery from Dad. This time Falky was again on the ropes but this time, Falky flew to the nest to try and get the fish. He failed. This means that Ervie had the last three fish deliveries!
At 11:00 both Ervie and Falky are on the nest. Falky finds a fish tail left from Ervie. He grabs it and flies over to the ropes to have a snack.
At 11:12:56 Falky flies over to the nest to join Ervie. Falky probably wants to see if Ervie left any more tasty tidbits.
The arrival of Falky on the nest does not sit right with Ervie and there is a dust up.
Ervie decides he has had enough and leaves. After all, he has had 3 of the last 3 fish deliveries.
Falky gets the 12:45 fish delivery from Dad.
Falky is on the left and he has relieved Dad of the fish. Dad is on the right. You can see that the fledglings are as large as their parents.
Two hours later, Falky remains on the nest. I wonder if this is his reservation day??? We wait to see.
Will Falky occupy the nest and get the next three or four deliveries? Will he spend the night on the nest? We have to wait and see.
I hope that each of you really learned a lot from this Osprey nest and that all of you will tell a friend to watch with you next year.
The Fosters do a great job with The Port Lincoln Osprey Project. They have successfully advocated for satellite trackers for the birds and we have learned much from Solly’s travels. Now we have the opportunity to learn from Ervie. The Fosters also advocate for safety measures for the birds including covers for the hydro poles. Hopefully they will post how that is going on their FB page. I am very grateful to them for this streaming cam and for their FB page. That is where I took today’s screen captures and video clips.
Thanks for joining me! Take care everyone. See you soon.
Thanks Mary Ann for all the videos and photos and info on the PLO’s! They have been a pleasure to watch and are so beautiful! I’m so thankful they all three have done so well this season! That Ervie is something else! Love them all!
Have a great evening and take care!