Why only juvenile Tiger Shrikes arrive in Singapore?
Posted by BESG on 30 November 08, Sunday
Contributed by KC Tsang
KC Tsang sent this comment on 2nd October 2008: “This was the first time that I have seen an adult male Tiger Shrike (Lanius tigrinus) on 28/08/2008, and this was in nearby Panti Forest, Johor (left top). However on the other side of Panti, which is the Kota Tinggi waterfall side, the three were all juveniles.
“On 01/09/2008, yesterday, the one at Singapore’s Japanese Gardens was also a juvenile. On 02/09/2008, at Venus Drive (left bottom), the bird was also a juvenile. So waiting to see if anyone of us here would be able to spot, or take a picture of an adult Tiger Shrike in Singapore. ”
Tiger Shrike is a winter visitor to Singapore, arriving from as early as 3rd August and as late as 30th April. So far, only juveniles have been encountered. Over in Johor, Malaysia, adult Tiger Shrikes have been seen.
Birders are always wondering how come adults do not reach Singapore?
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Categories: Migration, Migrants
Comment by Charlie
Made Sunday, 30 of November , 2008 at 1:05 am
Out of curiosity is a similar age pattern shown by Brown Shrikes in Singapore? When I was last over (Nov 5th) I saw an adult female BS, but a sample of just one is hardly enough to draw any conclusions from!
Thanks
Comment by Subaraj
Made Sunday, 30 of November , 2008 at 6:02 am
It is not true that adult Tiger Shrikes do not reach Singapore! We do observe a few adults each winter. However, there are far more juveniles than adults.
Many adults tend to either arrive early in the season or fly stright through. We also encounter adults in spring, when they are on their way back. It is also possible that adults take up winter territories further north while juveniles are forced to migrate further….but this needs to be proven.
There definitely seem to be more adult Brown Shrikes than Tigers each year.
There are also far more immature or female Yellow-rumped and Mugimaki Flycatchers and Siberian Blue Robins each year than adult males! Many male Blue Robins do migrate through early.
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Made Sunday, 30 of November , 2008 at 6:36 am
[...] Original post [...]
Comment by Brandon Chia
Made Monday, 1 of December , 2008 at 9:05 am
Hm… I’ve saw a juv Tiger Shrike at Sungei Buloh. I saw it on aug 08.
