In Sweden, pairs on average built 2.4 of them.
In fact, last year was the first time a pair of eagles ever built a nest in the park.
The pair quickly built a fire circle with dry stones found by the watercourse.
A pair of outdoor exercise yards were also built, separated from each other by a wall.
The pairs then build a nest, most of the work being done by the male.
The breeding pair builds a stick nest in large trees.
The pair built an image campaign around a single word: "research."
However, the pair built in a secret entrance and stole his fortune.
"And one pair has built its nest in an old crab apple tree there," he said.
An integral part of the tutoring program is that these pairs build relationships beyond academics.