The gestation period is 11.5 months, yet some individuals have been known to breed in two consecutive years.

At least 40 species have been recorded, with 34 known to breed there.

Over 75 species of bird are known to breed in the state park adjoining the lake.

It is not known to breed in Britain, occurring only as a migrant.

They are known to breed on land in the polar regions.

Currently, there are 126 bird species known to breed in this area.

Then there were the tree swallows, which had not been known to breed in the park since 1868.

"Birds have been known not to breed if they don't have enough food," he said.

There are schools that are known to breed circuit players.

Eight seabird species were known to breed on the islands in 2007.