The early migrants included all the five expected species, namely the Western Osprey, Oriental Honey Buzzard, Japanese Sparrowhawk, Chinese Sparrowhawk and Peregrine Falcon, during the July to September period.
A total of 27 Oriental Honey Buzzards were recorded. At least nine were immature orientalis, which would be individuals hatched last year, spending the summer here this year and migrating to the north only next spring. One torquatus tweeddale morph was photographed at Mandai Road on 10 July, and another at Pasir Ris Park on 24 & 25 August, both being adult males.
Twenty nine Japanese Sparrowhawks were recorded, a much higher number compared with the same period last year when only five were recorded. The first arrival was on 1 September at Kranji Marsh; seven around the central forests from mid-to-end September; one at Pulau Ubin and 20 at the southern ridges, notably 8 on 27 September and 11 on 29 September at Henderson Waves.
The three Chinese Sparrowhawks recorded were all juveniles. The first arrival was a single bird on 24 September at Henderson Waves, followed by another on 29 September and the last one at Pulau Ubin on 30 September.
One Western Osprey was recorded at Yishun Dam on 18 August and another at Sungei Buloh Wetland Reserve (SBWR) on 24 Sep. At Lower Pierce after sunset on 24 September, a sparrowhawk, not identified to species, was going after bats.
Five Peregrine Falcons were recorded, however only the individual on 24 September at SBWR is likely to be a migrant, with the rest being of the resident ernesti subspecies. The individuals recorded at Hindhede park on 28 July, and Pulau Ubin near the jetty on 19 & 22 August, both perched on telecom towers, were noted as ernesti. The other two recorded on 21 July at Gardens by the Bay, and 25 July at Changi Coastal Road were probably ernesti as well.
For the resident raptors, seven species were recorded, and only the notable records are highlighted. A young White-bellied Sea Eagle was observed sitting on a nest at Loyang on 9 July. A Brahminy Kite was mobbed by crows at Lorong Halus on 28 August. For the Crested Goshawk, two juveniles recorded during this period are good signs of breeding, one at Windsor Nature Park on 7 July and another at Bidadari on 28 September.
Two Crested Serpent Eagles were recorded. One individual photographed by Benny Ng at Yusof Ishak Secondary School on 18 August was notably a juvenile, which is rarely seen in Singapore. The other was an adult photographed flying over the Learning Forest at the Botanic Gardens on 25 September.
For a pdf version with more details, please click Singapore Raptor Report, Early Autumn Migration, Jul-Sep 2018
Many thanks to everyone for their records and to Pary Sivaraman, Alvin Seng and Benny Ng for the use of their photos.