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 lightweight but strong skeleton.
Birmingham (/ˈbɜːrmɪŋəm/) is a major city and metropolitan borough of West Midlands, England. It is the largest and most populous British city outside London, with a population in 2014 of 1,101,360. The city is in the West Midlands Built-up Area, the third most populous urban area in the United Kingdom, with a population of 2,440,986 at the 2011 census.
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.
Birdman or (The Unexpected Virtue of Ignorance), commonly known simply as Birdman, is a 2014 American satirical black comedy-drama film directed by Alejandro G.
In probability theory, the birthday problem or birthday paradox concerns the probability that, in a set of
Birla Institute of Technology & Science (shortened BITS or BITS Pilani) is an Indian institute of higher education and a deemed university under Section 3 of the UGC Act 1956. The university has 15 academic departments, and focuses primarily on undergraduate education in engineering and the sciences and on its management programme.
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.