Ce sont les mots les plus souvent utilisés dans ce livre.
1985
1988
1990
al
although
another
area
behaviour
between
birds
call
cases
chaffinch
changes
chapter
complex
control
dawn
dialect
differences
different
does
during
effect
elements
et
even
evidence
example
experiments
females
field
fig
first
form
found
frequency
function
great
groups
habitat
high
however
important
individuals
learn
learning
less
males
mate
may
might
neighbours
new
number
occur
often
own
particular
playback
population
produced
production
rate
rather
repertoire
response
results
see
seems
several
show
signal
similar
sing
singing
size
song
sound
sparrows
species
structure
studied
studies
suggests
syllables
technique
territorial
territory
time
tits
two
types
use
used
variation
variety
warbler
year
young