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 (Nicki Minaj song) Sasha Fierce, not by any stretch. “Fly” makes good work out of its Rihanna cameo — while the dark glamour bird soars, Minaj skitters around her with her vulnerable but choppy rhymes, equal parts tough woman and big softie." Scott Plagenhoef of "Pitchfork Media" complimented the song and how it made "Pink Friday" the record it is by stating, "but these tracks -- plus the Rihanna collaboration "Fly" and the solo ballad "Save Me" -- are the best examples of what Pink Friday is rather than what many of us wanted it to be." Rob Sheffield of "Rolling Stone" commented