Tuesday, 15 April 2014

Odds and ends

Now about a week into incubation, there's time to post about a few other peregrine-related things:
First, a reminder for teachers that the free resources boxes are now available for schools in both the county and the city. For full details please scroll down this blog to the entry for 21st March.
Contents of a resource box displayed

Second, a new book on peregrines; 'Top Gun of the Sky' is available direct from us.
The book, by Martin Bradley, has few words but wonderful paintings and is mainly aimed at children. Martin works at Fawley Refinery near the New Forest in Hampshire. The refinery has a pair of peregrines nesting on it - and Martin has become fascinated with them.
Book cover

To obtain a copy including postage of £1.50 within the UK, either send a cheque for £6.50 payable to DWT to East Mill, Belper, Derbyshire DE56 1XH or ring the office (01773 881188) and pay by credit/debit card. Should anyone want a copy send overseas please ring the office for a price to include overseas postage. We have a limited number of copies in stock but can obtain more as required. The project gets £2 for each copy. Should you wish to make a donation in addition to the basic £6.50 we would naturally be delighted!
Third, while our urban peregrines are pretty much safe, peregrines in the north of the county are not, especially if they try to nest on moorland in the Peak District National Park which is managed for red grouse shooting. Despite being protected by law (and receiving the highest level of protection under 'Schedule One'), peregrines and other raptors keep 'disappearing' from the moors and nest sites are left empty.
One nest site which has failed to rear any young for years, has recently been occupied by a new pair of falcons and in an attempt to ensure these birds survive, the nest site has been made public and a hide for watching them has been erected by the National Trust which now seeks volunteers to take part in a round the clock rota watching the birds.
Upland Peregrine by Noel Cusa
Simon Barnes, wildlife writer for The Times, visited the site last week and has written about the shameful situation regarding peregrines and other raptors in the Peak District in his column last Saturday (12th). Unfortunately, Simon's excellent article is unavailable online unless you take out a trial subscription to the paper for a month (cost £1).
Nick B (DWT)

Saturday, 5 April 2014

Full clutch

Our fourth egg appeared on Saturday morning around 9am. As usual it was first reported on our blog by comments from a number of our web cam watchers. This is yet another full clutch of four for Derby's amazing peregrine falcons.

The two video clips below were captured by an automatic recording process from our super new nest camera (see Stream 4). The first was a moment just before midnight last night (4th April); the second at 07:20am this morning, with the male bringing in food to our hungry falcon. (The male will do all the hunting now, whilst the falcon does the majority of the incubation).

Wednesday, 2 April 2014

Egg number three is laid

Thanks to our eager band of egg-watchers, egg number three was spotted just after 9 pm tonight (2nd April).
So just a final one to go (we hope) to complete the clutch and start full incubation. Given that the gap between numbers 2 and 3 was well over 48 hours, the last egg might be laid sometime on Saturday?

Down at the cathedral this morning for another BBC Radio Derby interview (they're mad keen on peregrine stories this year!), there was no sign of the intruder.
Four different clutches of peregrine eggs
The male flew in and landed on the stonework just above and to the side of the platform - a position I don't remember seeing him take up before. He peered down into the platform and soon flew down to cover the eggs as the female flew off and away to Jurys Inn.
The male's job for the next month once 'serious' incubation has begun will be to hunt prey and bring back all the female's food requirements for her. She will do the bulk of the incubation, just slipping away to feed, preen and perhaps go for a bathe (we have no idea where they go to wash and drink by the way!).
She is rarely away more than an hour or two, returning and almost pushing the male off the eggs so keen is she to get back onto them.
Peregrine eggs are a wonderful colour when fresh
This makes sense since, being a bigger bird, her brood patch is large and she is much better at covering the clutch than is the male. (A brood patch is that part of her lower belly where the feathers moult leaving a bare area rich in blood vessels. This, when pressed close to the eggs, allows them to be kept really warm to aid their development).
Nick B (DWT)

Tuesday, 1 April 2014

Should we expect a full clutch?

Now that April 1st is out of the way (no comment but see the previous post if you missed it!), we can look forward to the laying of a third egg tomorrow, 48 + hours after the second.
We have become very accustomed to our female laying a full clutch of four eggs. After all, she has done so since 2007 (she only laid three eggs in 2006 - her very first year of breeding).
Our fruitful female

However, as she gets older, we need to be aware that her egg-laying capacity may diminish and she may only lay three or even two eggs.
Also it could be that the male's fertility will decrease...but hopefully not this year let alone next - which will be their tenth year breeding together, assuming both of them survive into spring 2015.
With luck, and now maybe tempting fate a wee bit, we expect the fourth egg to be laid around Friday/Saturday and if that is the case, full incubation will start straight away.
This allows us to predict when the chicks might appear and when they will be big enough to peer over the front of the platform and be seen from below. Ian Layton, our Engagement Officer, will now be able to start planning the Watch Points that we run each May and June down on Cathedral Green behind the cathedral.

For those of you new to Derby's peregrines these are events where we bring telescopes so that anyone passing by (or coming specially) can see the birds 'for real'. Details of dates etc will appear on this blog nearer the time of course.
So, there's plenty to look forward to...though, once incubation starts, be warned; things will go very quiet for about a month.
Nick B (DWT)