Misc: Army unit usually of 300-1000 men?

Questions

A hedgehog's heart beats ______ times a minute on average?

Camels have three ______ to protect themselves from blowing sand?

The placement of a donkey's eyes in its' heads enables it to see all it's ___ at all times?

A mole can dig a tunnel ________ feet long in just one night?

A hummingbird weighs less than a?