Two days in a row we've seen a Kirtland's in the park, a real treat. This one was far away and high in a tree.
The Kirtland's Warbler requires areas with small jack pines for nesting. The jack pine requires fire to open its cones and spread its seeds. The warbler first appears in an area about six years after a fire when the new growth is dense and is about 1.5 to 2.0 meters (5.0-6.5 feet) high. After about 15 years, when the trees are 3.0 to 5.0 meters (10.0 to 16.5 feet) high, the warbler leaves the area.
Source -Cornell Lab of Ornithology- All About Birds