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تقرير متابعة الطيور صادر عن كريس وعصمت Ringing report by Chris and Esmat

الكاتب: موسوعة النيل Nilopedia الرقم المرجعي: AA-00373 مشاهدات: 874 أنشيء: 2016-02-19 09:13 آخر تحديث: 2016-03-01 11:17 0 التقدير/ الأصوات

Saturday, 21 April 2012

Ringing report by Chris and Esmat


Ringing on um Shugeira, March 2012 – Chris & Esmat

Between the 28th March and 1st April the two of us (Chris and Esmat) returned to um Shugeira Island in the Blue Nile in Khartoum for a second ringing expedition to follow up on our first in January. Water levels had dropped slightly since January but ringing conditions were much the same although there was less wind overall except for the first night when it was quite strong. In total 172 birds were ringed comprising 15 species. This gave us a grand total of 414 birds ringed for the season, a reasonable total but one that we can hope to improve upon next year. Now what we need is some recaptures from Europe!

Looking toward Omdurman from ringing camp

As before, we kept the nets open 24 hours a day and managed to catch and ring a reasonable number of waders. As before we were surrounded by Ringed Plover on the dried mud near where we were camped, and as before we were frustrated in our attempts to capture any. Again we failed in our attempts to capture any Black-tailed Godwit. In January Curlew Sandpiper had been common and we had ringed a number. This time only a handful was seen and none were captured but Little Stint remained common and a number were ringed.

Two species that were especially numerous were Ruff and Whiskered Terns. In January we ringed a number of Whiskered Terns but only a couple of Ruff. This time we ringed 123 Ruff but no terns at all!
The Ruff were almost all female, only 2 males were captured and ringed, and good proportion of those were first winter birds still with green to brownish green legs.

The sexes of the Ruff normally overwinter separately with the males tending to overwinter closer to Europe so that the further south you go on the African continent, the lower the proportion of males. In South Africa this may be as low as 1:12 to 1:15 males to females. However, this cannot explain the huge discrepancy here and this is more likely to result from males having returned to the breeding grounds to establish their lekking territories.

Pied Kingfisher, Um Shugeira

One interesting occurrence was the ringing of a Senegal Thick-knee. On the last morning I noticed two birds in the net nearest our camp and started toward them.  As I did so the one bird started struggling and in so doing stretched the net and bounced itself into the water. I ran to the net and was there within half a minute, but it appeared I was too late. The Thick-knee lay apparently dead in my hand, its neck flopping loosely. I thought this was surprising but I took it back to the camp and we decided to keep it as the department could stuff it and mount it in a display. We wrapped it in a plastic bag for safe-keeping. Sometime later we heard sounds of scratching and struggling from in the plastic bag. We opened it and found a very much alive Thick-knee. It seems to have been feigning death! We immediately ringed and released it. It flapped its wings a couple of times to check that all was in working order, and then stalked off in what we felt were rather disdainful looks in our direction.

The lone Willow Warbler was captured in entirely unsuitable habitat and it was presumably either migrating north or simply crossing over the Blue Nile from one side to the other.

Overall species richness was higher than in January with 58 species recorded during our stay compared with 33 species during last January. Also waterbirds abundance was higher this time with 5706 birds compared with 4576 last January.


Species
Number
Ringed
Spur-winged Lapwing
80
2
White-faced Whistling Duck
100

White-winged Tern
300

Caspian Tern
10

Whiskered Tern
300

Slender-billed Gull
2

Gull-billed Tern
5

Black-tailed Godwit
150

Ruff
800
123
Fulvous Whistling Duck
340

Common Ringed Plover
900

Little Stint
200
25
Temminck's Stint
100
3
Common Snipe
3
2
Greater Painted Snipe
4
2
Jack Snipe
2
2
Little Egret
3

Pink Backed Pelican
5

Sand Martin
200

Brown-throated Martin
??
3
Northern Shoveller
108

Northern Pintail
300

Pied Avocet
130

Black-winged Stilt
15

Grey Heron
100

Eurasian Spoonbill
13

Marsh Sandpiper
30
3
Wood Sandpiper
1
1
Green Sandpiper
1
1
Kittlitz’s Plover
5
1
Black-headed Gull
120

Great White Egret
2

Collared Pratincole
10

Common Greenshank
2

Openbill Stork
16

Long-tailed Cormorant
25

African Spoonbill
11

Curlew Sandpiper
2

Yellow Bill Stork
1

Greater Flamingo
13

Sacred Ibis
1

Garganey
950

Eurasian Widgeon
50

Lesser Black-backed Gull
4

Great White Pelican
21

Kentish Plover
1

Spur-winged Goose
47

Ethiopian Swallow
100

Pied King Fisher
3

Yellow Wagtail
30
2
White Wagtail
1

Pallid Swift
50

Palm Swift
20

Squacco Heron
3

Purple Heron
4

Senegal Thick-knee
1
1
Common Moorhen
7

Willow Warbler
1
1
Total:
5706
172


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