social flycatcher?

I totally agree, as I was thinking the same regarding proporations. I'm wondering how much bigger than the usual 7 1/2 inches can the social flycatcher get? Those concrete slabs were quite thick and raised up off the ground to boot, which would make the bird in question closer to 9 or even 10 inches. I posted an agouti next to a similar walkway and he has to reach upward.

Of the ones you posted, http://www.flickr.com/photos/dagberg/127... I think probably is, but the others definitely not. Like I said, I'm looking more at size (which I realize can be variable) as much as anything

I have great respect to local guys, but I am still very sceptic about this one being a boat-billed flycatcher. Beak and head proportions do not match.
http://www.naturephoto-cz.com/boat-bille...
http://www.avianweb.com/boatbilledflycat...
I even challenge the IDs of these ones:
http://www.flickr.com/photos/dagberg/127...
http://www.richard-seaman.com/Travel/Bel...

I was wondering that myself, because the beak looked smallish, but were told by the local guides it was boat billed. It's bill looks small, but the bird was rather large, as shown against the concrete slab that was quite thick.

In my eyes the beak is too small for the Boat-billed Flycatcher. I think it might be the Social Flycatcher, Myiozetetes similis or Myiozetetes texensis (depending on the taxonomic order you take). According to avibase it is also called Myiozetetes similis texensis, so a subspecies of Similis. Please, verify yourself!
http://avibase.bsc-eoc.org/species.jsp?l...
http://www.1000birds.com/reports_CR_Soci...
http://www.flickr.com/photos/guppiecat/4...
http://www.flickr.com/photos/guppiecat/4...