Artamidae (Woodswallows) are a uniquely Old World family of birds with a heavy finch-like bill. There is evidence that they form a clade with butcherbirds, bell-magpies, and allies (Cracticidae). In fact the latest Australian checklist combines them all in the same family. I think their strong heavy bill shape supports this arrangements.
This is the only species of woodswallow that we saw in Thailand where it occurred in a variety of open habitats. They forage aerially like swallows. Sometimes we would see them huddled together on a power line, especially early in the morning. Males and females are alike.
Digiscoped with Panasonic DMC-LX5 | Nikon FieldScope III | 30XWA |hand-held (no adapter).