Largest organisms were related to the ostrich. They exceeded in height and . The last of the elephant birds became extinct about 300 years ago. Of almost exactly the same upper proportions as the largest elephant birds was "Dromornis stirtoni" of Australia, part of a 26,000-year-old group called mihirungs of the family Dromornithidae. The largest carnivorous bird was "Brontornis", an extinct flightless bird from South America which reached a weight of and a height of about . The tallest carnivorous bird was "Kelenken", which could reach 3 to 3.2 meters in height and 220 to 250 kilograms. The tallest bird ever was
Say's phoebe fashion. They attach their nests under bridges, canyon walls, wells and abandoned mine shafts. The nest is made by the female and is cup-shaped. It is made of grass, forbs, moss and plant fibers lined with hair and other fine materials. She lays three to seven, but usually four or five, white, mostly unmarked, eggs. Some have red spots. The eggs are roughly . Say's phoebe The Say's phoebe ("Sayornis saya") is a passerine bird in the tyrant flycatcher family. A common bird in the western United States. It prefers dry, desolate areas. This bird was named for Thomas Say,