Werkgroep Slechtvalk Nederland

Kaart NL


Some of the nesting boxes at the Electrabel powers stations were fitted with cameras: the Gelderland power station in Nijmegen, the Eems power station in the Eems estuary, the Harculo power station near Zwolle and the Hemweg power station in Amsterdam belonging to Nuon. In 2003, the images were placed on Electrabel’s Intranet site so that employees could be kept up to date on events around the nesting boxes. In 2005, the company made these images available to the Dutch Peregrine Workgroup for publication on their website.

5 nesting boxes have been fitted with one or two cameras each. The cameras supply a video signal to a PC. In this PC, a program makes sure that a picture is stored every 30 seconds. Upon opening or refreshing this page you receive the last stored images. The pictures on the page “LIVE BEELDEN” show some of these cameras. To the left the camera inside the nesting box of the kestrel. In the centre, the same camera but then from the outside and with the lid of the nesting box closed. To the right, the camera that records the outside images of the peregrine falcon nesting box in Zwolle.

Live images:

The nesting box was placed in 1995. From 1997 through 2002 there were successful hatchings with 16 fledglings. In 2003 and 2004, several hatching attempts failed because of females rivalling for a place to nest inside the nesting box.

Situation on 25 May
On 20 March, the first egg was laid. A second egg was supposed to be laid on 22 March but on-site construction work stopped the female from laying. After things had somewhat quietened down again the falcons produced a subsequent clutch of which the first egg was laid on 4 April and the second on 6 April. The egg from the initial attempt was still in the nest.

Sunday 8 May: just before 8 a.m. one egg is being hammered open and a moment later the first eyas is born! Between 11 a.m. and noon, the second chick hatches. Unfortunately, one of these is too weak to feed and dies. The remaining chick now receives all the attention and food! On 30 May, the chick was banded; it turned out to be a female.

On 19 March 2002, a nesting box was placed on the Hemweg power station. Until then, the odd wintering peregrine falcons had been observed in the vicinity of the power station. On 10 May 2002, a 2kj-female appears by the nesting box and in that autumn an adult male. In 2003 and 2004, there were several successful hatchings of two and four fledglings, respectively.

Current situation
On 16 May, the first egg hatched at approximately 8 p.m. Meanwhile there are three chicks in the nest; two males and one female.

The nesting box was fitted in 1999. In the two previous years, the peregrines had been found nesting on a power pylon in the vicinity. From 1999 to date, there have been 16 fledglings.
In 2004, an escaped hybrid falcon appeared by the nesting box which held the peregrine falcons at a distance.

After the hybrid had disappeared, the peregrine falcons soon returned to the nesting box. On 5 April a third egg was laid and on 7 April the fourth. We placed the second egg (that had been laid elsewhere due to the disturbance by the hybrid) with the other three eggs on 8 April.

On 11 May, the first egg hatched. There are three chicks, one egg did not hatch. 31 May; the three chicks (two males and one female) were banded.

The nesting box was placed in 1995. To date wintering peregrine falcons reside here and Egyptian geese use the box for incubation. During the last two years an escaped gyr falcon has been lodging there and is keeping away all peregrine falcons from the power station.

Situation on 20 April
The incubation time of four weeks is over and still there are no young geese. Sixteen eggs have been laid in the box, presumably by two geese; one egg broke earlier. The male has deserted the nesting place and when the female leaves the eggs to eat and drink the eggs stay behind unattended. A black crow then takes the opportunity to peck open the eggs. This is how nature has its own way of solving things.

The nesting box was placed on the gable of the building in 1999 at a height of approximately 20 metres. So far, the box has been occupied every year with successful hatchings. This year the kestrels are early.

Situation on 3 June
On 19 April at approx. 2 p.m. the first egg of a total of six was laid.
On 24 May at approx. 4 p.m. the first egg hatched; there are four chicks.