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
Not Only But Always takes its title) and various other projects before their later estrangement as Moore became a successful Hollywood film star and Cook remained in the UK. Although some events are fictionalised and condensed, and the film was criticised in some quarters for an unsympathetic portrayal of many of Cook's faults, it was generally well-received critically. Not Only But Always Not Only But Always is a British TV movie, originally screened on the Channel 4 network in the UK on 30 December 2004. Written and directed by playwright Terry Johnson, the film tells the story of the working and personal relationship between