Red-crowned Ant-Tanager

No worries - you have given me some great ids!

the other possibility(although the beak seems the wrong thickness) is the Dusky antbird

sorry I couldn't see the head ridge or bill. Color could be variable I would be off.

There are two ant tanagers in the yucatan. One prefers highlands, but is found in the lowlands. The other prefers lowlands. I chose the one most resembling the picture which is a bit dark and doesn't show the amount of light coloration on the throat. And yes, clay colored thrush has the wrong beak, color and shape and lacks the little head ridge

Bill isn't the right color or shape for clay-colored thrush. Karen's ID looks good, but I'm not familiar enough with birds down there to say for sure.

I was thinking Clay-colored Thrush

I saw these in Belize. Female. I'd double check the ID as there are two different possibilities - and I have a nagging suspicion there might be a third