These are the most frequently used words in this book.
0
across
africa
air
along
altitude
area
autumn
between
birds
breed
breeding
buzzards
coast
come
course
day
different
direction
distance
during
earth
east
energy
europe
even
example
fact
far
fat
field
figure
flight
flocks
fly
flying
food
found
geese
good
great
high
hour
however
islands
km
large
long
magnetic
may
mean
migrants
migrate
migration
migratory
night
north
northern
number
often
parts
passage
per
period
pigeons
place
populations
radar
recoveries
regions
sea
season
seeds
several
show
sites
small
south
southern
species
speed
spring
studies
summer
sweden
take
therefore
time
two
use
warbler
water
weather
west
winds
wings
winter
wintering
years
young