17th
April Two tiny young chicks on the back of the female as she sat on the nest
platform. They became visible after the
male grebe had been with food. One of
the young stretching its neck as the male bird swam away. The male foraged nearer to the nest than
usual and spent time in the reeds.
Perhaps searching there for appropriate invertebrate food for the young. I’m sure the female will be on the water soon
carrying the young. I wait to see if
more youngsters show up! Only one
Swallow seen in area of larger lake.
Hatching is spread
over a period of days 25-29 days. It is
25 days since I saw the birds first incubating.
19th
April Wet and cold today and there had
been heavy overnight rain. Nest platform
looked very low in water. Both adult grebes on the water today, with female
carry what appears to be still two young.
Both young birds seen on the water briefly when male approached to feed
them. On one occasion the male
approached with a feather and passed this to one of the young which was seen
and photographed at distance with the feather in its bill.
21st
April Water levels in lake very high after more rain. Only one Grebe chick visible today! Watched as it was fed down feathers by
female. Male grebe continues to seek
food in reed-bed and not so much in open water.
Coots that had nested near to grebes now feeding three chicks. Only one GCG found on larger lake and nesting
appears not to have taken place here this year.
The loose and
fragile structure of the flank feathers that loosen during preening may play a
role in connection with the unique feather eating habit of grebes………Feathers
are also fed to their young from the first day.
There is considerable dispute in the literature bout the odd feather
eating habit………….The feathers contribute substance to stomach content and
enable formation of pellets which are ejected……………Three main advantages of
pellet ejection have been suggested. (1) Sharp fish bones are rapidly wrapped
up in a felt like substance (preventing damage to the stomach wall) until they
are dissolved. (2) By ejecting pellets,
the grebes get rid of indigestible roughage that is left after a meal. (3) They can minimise the build up of gastric
parasite populations, which may represent a considerable health hazard. The Grebes/J Fjesdsa.
27th
April Water levels high again after more
heavy rain during the previous day. Only
one of the Coot chicks seen (numbers had grown to five) and I fear adverse
weather may have taken its toll. The
Mute Swan appears to be incubating on the nest hidden in the reeds. I had been alerted by Sam Hood as to the possibility
of there being three GCG young. In fact
there are, and all were on the water today for a short time. All look fit and well. The female now moving further from the nest
site.
2nd
May All three young on water and calling
loudly. The two smaller birds were soon
back on the female’s back. They
eventually joined the male in the area favoured for foraging and all three
youngsters were back on the water with both adult birds diving for prey. Remaining very nervous the birds all made off
back towards the area of the reeds on the first sign of any approach by
humans. One youngster seems well in
advance of its two siblings. The Mute
Swan continues to incubate. Numbers of
Swallow, Sand Martin and House Martin over the lake today, plus ten Common Terns.
5th
May. One young bird in centre of lake
with foraging/diving male. Two
youngsters near reeds with female. Much
calling from all young. One young
spending time on back of female.
Eventually all five birds together in area favoured for foraging. Adults favouring of young may have already
begun. Greylags appear to be nesting at
larger lake.
6th
May. Pair of GCG displaying at
Holywell Pond. Sam suggested they may be the pair from large lake at
Killingworth. I believe he is probably
correct. CS has long suspected that the
second pair of birds at Killingworth were originally the pair from
Holywell. As one of the pair kept
disappearing from Killy and one kept appearing intermittingly at Holywell. I
belive the birds may have returned to original breeding site following demise
of breeding area on floating reed bed.
8th
May. I was alerted by Sam of large influx of Swifts over Killy Lake
and also of all five GCG showing well on smaller lake. I later found 55+ Sifts (Sam had watched a
greater number) which slowly dispersed.
Initially I found only one adult GCG with two young. There was a significant size difference in
the two young. I think perhaps it was
the eldest and youngest of the three.
For over thirty mins there was no sign of the other adult and third
young grebe. There was continuous
calling from the other two young, now being fed large fish. I heard no calling from the third youngster. This third bird eventually emerged from the
reeds with the other adult. Showing very
clearly the fact that the adults have taken over care of different young. All birds look to be well.
Male and female may
each have a favoured chick……..This favouritism is often reinforced as in-chicks
try to dominate their siblings……………In the course of the second week the parents
may separate, more or less permanently, with one or two chicks each. The Grebes/J Fjeldsa
20th
May. Watched GCGs for 45 mins and found
only 2 young with the adults. It’s seems
one of the youngsters has been lost! The
larger youngster was noisy and continually begging for food whilst the smaller
sibling swam quietly and alone by the reeds.
Both adults appeared to be feeding the noisy individual, but by far the
main feeding was been done by one adult.
23rd May. Only two youngsters confirming for definite that their sibling has been lost. Very clear line seems to be drawn now with each adult feeding a different youngster.