Straits of Singapore Pelagic Survey 5th Oct 2014

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Pelagic Team from left: Wing Chong, Alfred Chia, Tan Ju Lin, Francis Yap, Con Foley, Alan OwYong, Lim Kim Keang, Lee Tiah Khee, Willie Foo and Lim Kim Seng.

Ten members of the Bird Group set out this morning to the Straits of Singapore to begin this Autumn’s Seabirds Count. The skies were a little overcast in the early part as we cruised eastwards in semi darkness after clearing immigration. The count started with a bang when 6 Swinhoe’s Storm Petrels were seen on migration just south of St John’s Island. Unfortunately these were the only ones we encountered for the day. A worrying decline. This was followed by multiple sightings of Swift (9) and Lesser Crested Terns (11). We could not identify at least 18 of these terns due to poor morning light. The appearance of these large terns just off Kusu Island was a bit of a surprise as we normally see them further east.

The star bird of the day flew across at around 7.30 am. Some of us did not take much notice. Luckily Francis quick fingers got it on his sensor and was identified as a uncommon non-breeding Gull-billed Tern, a local tick for Francis. Later on the way back he shot another wide bodied tern which was later identified by Dave Bakewell as a first winter Common Tern.

Gull-billed Tern
(Non-breeding Gull-billed Tern)

Common Tern
(First-winter Common Tern)

A lull followed before we cut into flocks of Bridled Terns just north of Batam. On the way back more Bridled Terns were also seen at this part of the Straits. They were all flying east. In all we counted 81 Bridled Terns, the highest number tern species seen this morning. The one spot where we can expect some action was near the yellow buoy in the middle of the Straits. This is where many of the terns rest and where Jaegers have been seen harassing them for food. It was missing most probably taken after after the savaging the wreck below.

Bridled Tern
(Bridled Tern perching on flotsam ready to fly)

Bridled Tern
(Bridled Tern in flight)

As we approached the seas off Changi, the boat skipper was looking for floating debris as most of the visiting Aleutian Terns use them to rest. The seas were rather clean this morning but eventually we found some and with it the Aleutian Terns. The first one was a juvenile with a brown neck, a plumage we have not come across before. The total count for the Aleutian Tern was 12, including one off Kusu Island on our way back.

Aleutian Tern
(Adult Aleutian Tern in flight)

Aleutian Tern
(Juvenile Aleutian Tern)

Aleutian Tern
(Adult non-breeding Aleutian Tern)

Aleutian Tern
(A successful hunt for fish by an adult Aleutian Tern)

In between 15 Marsh Terns, mainly White-winged and a Little Terns were seen.

White-winged Tern
(Adult White-winged Tern losing its black breeding plumage on it’s underparts)

White-winged Tern
(An adult White-winged Tern in non-breeding plumage with it’s characteristic ‘headphones’)

Total count for the day was 155 seabirds from nine species. All in a good day out. Many thanks to Alfred for organising this count and everyone for their help and company.

Photos: Francis Yap and Alan OwYong.

 

 

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