Odd combination to see a parrot and a reptile in the same exhibit. Given the boisterous and destructive habits of most parrots it doesn't seem like an ideal mix to me. And lovebirds are known to be quite vicious for their small size.
Given that both species have plenty of space to avoid one another, I think you don't have to be that concerned about interspecific aggression. Based on how some of the lovebirds looked, however, intraspecific aggression might be a bigger issue.
@Batto Some people in aviculture call lovebirds "hatebirds" or "warbirds" because of their often vicious character, so I wouldn't be too surprised about that.
