Plumbeous Pigeon
Patagioenas plumbea
The plumbeous pigeon is 34 cm (13 in) long and weighs 172 to 231 g (6.1 to 8.1 oz). Males have a dark gray head, neck, and underparts that sometimes have a pinkish or purplish tinge. The shoulders, back, rump, wings, and tail are dark grayish brown to drab olive. The hindneck sometimes has bronzy spots. The eye is red and surrounded by bare purplish red skin. The female's purplish wash is less intense and the neck spots more intense than the male's. Juveniles are duller than the adults, with very little purplish wash, and some feathers have rusty edges. Voice: The general pattern of the plumbeous pigeon's song is "a repeated rhythmic phrase of 2–5 coos" and the call is "a purring, drawn-out, slightly overslurred 'rrrrrow'." There are at least five distinct vocal groups whose songs are variations on the general pattern.
ID text from Wikipedia, CC BY-SA 4.0

Scaly-naped Pigeon
Patagioenas squamosa
The scaly-naped pigeon is a large slate grey pigeon (14–16 in), with maroon coloured plumage around the neck. The plumage on the species' nape appears scaly, explaining both the common and scientific names of the species. There is a bare patch of skin which surrounds the birds red eyes; this patch tends to be reddish in males and more yellow in females. The legs and the base of the bill of the species are red, while the remainder of the bill is light coloured.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Plumbeous Pigeon and Scaly-naped Pigeon.