BIR or Bir may refer to:
Birds (Aves), also known as avian dinosaurs, are a group of endothermic vertebrates, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton.
Birmingham (/ˈbɜːrmɪŋəm/) is a major city and metropolitan borough of West Midlands, England lying on the River Rea, a small river that runs through Birmingham.
Birmingham (/ˈbɜːrmɪŋhæm/ BUR-ming-ham) is the most populous city in the U.S. state of Alabama and the county seat of Jefferson County.
Birth control, also known as contraception and fertility control, is a method or device used to prevent pregnancy.
Bird migration is the regular seasonal movement, often north and south along a flyway, between breeding and wintering grounds.
A birthday is an occasion when a person or institution celebrates the anniversary of their birth. Birthdays are celebrated in numerous cultures, often with a gift, party, or rite of passage.
Birdman or (The Unexpected Virtue of Ignorance), commonly known simply as Birdman, is a 2014 American black comedy film directed by Alejandro G.
In probability theory, the birthday problem or birthday paradox concerns the probability that, in a set of
Birmingham Airport (IATA: BHX, ICAO: EGBB), formerly Birmingham International Airport and before that, Elmdon Airport is an international airport located 5.5 nautical miles (10.2 km; 6.3 mi) east southeast of Birmingham city centre, at Bickenhill in Solihull, England.