In Genesis, Noah brought seven pairs of every kind of bird onto Noah’s Ark.
Genesis 7:3 instructs Noah to take seven pairs of birds, male and female, so their kinds could be preserved across the earth. The same chapter gives a different number for animals described as not clean: one pair of each. Genesis 7:2 also refers to seven pairs of clean animals.
This is one of the narrative’s frequently noticed numerical differences. Some translations render the bird instruction as “seven pairs,” while the underlying phrase has also prompted discussion over whether it means seven individual pairs or seven individuals of each kind. The common English reading is seven pairs.
The question is specifically about birds. It should not be generalized to all animals, because the Genesis passage distinguishes categories and assigns different counts.