Went the the School after receiving information that a flock of 5-8 Little Pigeons have been coming regularly to a nearby fruiting tree . When the birds came I could see that they were actually Pink-Necked Green-Pigeons (Treron vernans). Never mind, appreciate the info. At least it was an opportunity to improve on the existing photos.
The female is greener than the male and lacks the orange patch on the breast.