In my last post I mentioned that Judy and I visited Tikal NP in Guatemala, on March 19, 2026, with a guide, Rony, who our travel company indicated was the top birder in northern Guatemala. When we got into the national park our driver, Rony's cousin, stopped along the side of the road and let us out. It was about 6:00 a.m. and still quite dark, particularly given the tall and thick trees and foliage that lined the two lane road. Rony indicated a black-headed trogon was above me in a tree. I could see an outline of the bird through my camera viewfinder, but I was not seeing color or any details. Rony had binoculars, in addition to his bare eyes, and he was apparently seeing colors, but it turned out he made quite a few identification mistakes as I've discovered since getting home and working on my digital photos in Lightroom. I'm sure many of the mistakes were related to the poor light. This was one of the first ones. When I downloaded the photo below it was all dark - I was not seeing color or any details. It was only when lightening up the photo that the colors jumped out. When I input the photo into iNaturalist it was identified as a gartered violaceous trogon. I thought it had to be a mistake. So I looked up a photo of it on Birds of the World and that looked like the correct identification.
Then I looked up black-headed trogon and the difference was immediately noticed. See my photo of a later black-headed trogon, below, that Rony correctly identified and which was the subject of my last post. Looked at the tail feathers. The black-headed trogon has six large blocks of white covering most of the tail feathers while the gartered violaceous trogon has six smaller white blocks, but also many white lines between them. Another difference, not as noticeable, is the blue eye-ring on the black-headed and the yellow eye-ring (which does not stand out in my photo) on the gartered violaceous. The upper parts (on the back side) are also quite a bit different but those are not seen in the front-facing photos. You can just barely see the violet-blue on the upper breast (part of the lower parts) and the yellow eye-ring.
The benefit is that I saw two different species of trogon, both lifers, instead of one, when I originally thought I'd seen the same species twice. An illustration of the gartered violaceous from Birds of the World (which does not show the underside of the tail), and a range map, are below.




































