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The Natural World : Bird migration


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aspect
a part of feature
breed
to reproduce
diurnal
active during the day
endure
live under difficult conditions
evolve
to develop gradually
fascinate
to interest greatly
feat
a difficult act or achievement
fuel
to provide energy
hemisphere
one half of the Earth; also, one half of a sphere
imperative
a priority; an urgent need
inhabit
to live in
migration
movement from one place to another
navigation
finding the way from one place to another
nocturnal
active at night
observer
a person who watches something
obscure
to make difficult to see
optimal
best, most favorable
species
type; a basic group in biological classification
stray
to leave the correct route; become separated from the group
windswept
unprotected from the wind