* As a common noun: You wouldn't capitalize "pigeon" unless it's the first word of a sentence.
* Example: "The pigeon cooed softly on the windowsill."
* As part of a proper noun: If "pigeon" is part of a specific name, you would capitalize it.
* Example: "The Pigeon Cafe is known for its delicious pastries."
* As a title: If "pigeon" is part of a title, you would capitalize it according to standard title capitalization rules.
* Example: "The Pigeon and the Boy" (book title)
Let me know if you have a specific sentence in mind, and I can help you figure out the capitalization!