These are Long-tailed Parakeets (Psittacula longicauda). Size 16" long, 41 cm. 
Male has green crown, pink sides, black malar stripes, red maxilla and brown mandible. 
The female has dark green malar stripes and dull brown bill. The male has a longer
 tail than the female. It is resident at low elevations and found mostly near durian 
orchards, and oil palm plantations. It usually frequents the canopy in 
noisy flocks and perches on tall dead trees.