One may not pray near feces or other sources of biological waste and decay that give a foul odor (see the article for several opinions on when/how it applies). Does this include bird droppings? ...
Is it permissible to say a prayer in a restroom (or bathhouse), assuming one does not use a name of God (including things like shalom) or a quotation from Torah? I'm thinking of things likesaying ...
Is there any problem with reciting a b'racha (or other devarim shebikedusha) underneath a second-floor bathroom?