Yellow-necked Green Pigeon look-alikes

Key differences

The Yellow-necked Green Pigeon was formerly considered a subspecies of the Pink-necked Green Pigeon (Treron vernans). However, recent taxonomic revisions (e.g., by IOC) have split them into two distinct species. The key difference is the male's neck patch: Yellow-necked has a bright yellow patch, while Pink-necked has a pink patch. Females are very similar and difficult to distinguish in the field without clear views of undertail coverts or vocalizations.

Key differences

Males of Little Green Pigeon have a grey head and breast, and a chestnut mantle, lacking the yellow neck and pinkish-orange breast of the Yellow-necked Green Pigeon. Females are entirely green with a greyish wash on the head, but lack the distinct yellow undertail coverts of the Yellow-necked Green Pigeon.

Key differences

Thick-billed Green Pigeons have a noticeably thicker, heavier bill. Males have a maroon mantle and grey head, but lack the yellow neck and pinkish-orange breast. Females are duller green with a greyish head, but their bill shape is a key distinguishing feature.