Misc: what is the main gas in venus' atmosphere?

Questions

Goats generally need their ---------- trimmed once a month.?

---------- may travel great distances on their migrations. The Arctic tern travels from the top of the world, the Arctic - to the bottom, the Antarctic. Round trip in a single year: 25,000 miles in all.?

---------- eagles hunt over a range of 100 square miles to feed their young.?

---------- played a role in aerial warfare during World War I. Because of their acute hearing, parrots were kept on the Eiffel Tower to warn of approaching aircraft long before the planes were heard or seen by human spotters.?

Boredom can lead to madness in ----------. When caged by themselves and neglected for long periods of time, these intelligent, sociable birds can easily become mentally ill. Many inflict wounds upon themselves, develop strange tics, and rip out their own feathers. The birds need constant interaction, affection, and mental stimulation; some bird authorities have determined that some parrot breeds have the mental abilities of a 5-year-old human child. Should a neglected parrot go mad, there is little that can be done to restore it to normalcy. In England, there are "mental institutions" for such unfortunate creatures.?