Examples of pigeon intelligence

[TitanicWreck]

Some claim pigeons neither feel nor think, but my daily observations of the many pigeons living in my city of Boston Massachusetts have given me plenty of examples of visual proof that pigeons are indeed intelligent.
They have complex emotions, and each pigeon, in my opinion, has a unique personality. Some are social, some are loners. Some are friendly, some are hostile. Some are curious, some are timid.
I work on a ferry boat, and observed a pigeon finding a seeming inacessable nook under a dock as a place for her nest-This pigeon did indeed contemplate and think about the placement of her nest- My coworkers insisted this pigeon certainly couldnt think, but rather operated on blind instinct alone.
But the visual evidence suggested otherwise....

City pigeons seem almost quasi tame, in that they don't fear humans, but will quickly walk away of course to avoid being stepped on.

These birds are quite remarkable, and it never ceases to amaze me the complexity of the pigeon mind..