Bird migration evidence. Seabirds fly low over water but gain altitude when crossing land, and the reverse pattern is seen in landbirds. However most bird migration is in the range of . Bird strike aviation records from the United States show most collisions occur below and almost none above . Bird migration is not limited to birds that can fly. Most species of penguin (Spheniscidae) migrate by swimming. These routes can cover over . Dusky grouse "Dendragapus obscurus" perform altitudinal migration mostly by walking. Emus "Dromaius novaehollandiae" in Australia have been observed to undertake long-distance movements on foot during droughts. While participating
Fly Like a Bird Eve celebration, Carey performed the first three singles from the album, as well as "Fly Like a Bird" and "Make It Happen" (1991). Months later, following the tragic events involving Hurricane Katrina in the Gulf Coast throughout August 2005, she was featured as a head-lining performer at the "Shelter from the Storm: A Concert for the Gulf Coast" concert charity benefit. Carey, wearing a non-formal ensemble of a pink tank-top and blue jeans, performed "Fly Like a Bird" alongside a large church choir. According to Nielsen Media Research, the special was viewed by over twenty-four million United States citizens, airing