Summer birds and late Yellow-browed Warbler

Out early this morning, as I thought the weather looked promising for seeing migration.
Hah - I may have co-authored a paper on weather and migration in Hong Kong, but what do I know? No signs of birds on he move, and precious little in the woods in southeast Cheung Chau.

Did see and hear an Indian Cuckoo flying over the coast, singing One more bottle!  - and another Indian Cuckoo further to the west. Heard Chinese Starlings at Nam Tan; saw to more at the top of Peak Road- where I think they generally breed (in holes under roof tiles?).
Also a displaying Crested Goshawk. Plus a few Black Drongos - which like the cuckoo have arrived only recently and will breed (indeed, I've an idea the cuckoo parasitises the drongos: femaile lays its egg in drongo nest, and leaves; the drongos rear the young cuckoo).

Only noticed a passage migrant when back to Siu Kwai Wan: a Yellow-browed Warbler. Late in the spring for this species, which is a winter visitor, also passing through Hong Kong rather earlier in April.