The latter.
I had to dig. I don’t think they ever told us what the guy actually said.
From Ian’s Wikipedia entry:
“On a boat trip in Louisiana, the boat guide referred to a type of stork
the group spotted as a "nigger stork".[16] Melissa took offense to the
comment, and to the fact that Jamie was not as offended.”
I have no idea if the thing has another name or what it is. Siri and Google
pretty much won’t let me search for the offensive word at all. When I do
get past it I only get a handful of hits.
There are two types of storks in Louisiana. Both are mostly white with a
darker head. But I don’t even know if the thing he pointed to is properly a
stork. I can’t find an actual clip of what happened.
So on the show it played out that a guide pointed to something we didn’t
see and called it something we didn’t hear and Melissa had an end of the
world fit and was furious at other people for not being properly indignant.