Integrative Zoology,
Journal Year:
2017,
Volume and Issue:
13(2), P. 194 - 205
Published: Oct. 27, 2017
Song
plays
a
fundamental
role
in
intraspecific
communication
songbirds.
The
temporal
and
structural
components
of
songs
can
vary
different
habitats.
These
include
urban
habitats
where
anthropogenic
sounds
alteration
habitat
structure
significantly
affect
songbird
vocal
behavior.
Urban-rural
variations
song
complexity,
length
syllable
rate
are
not
fully
understood.
In
this
study,
using
the
oriental
magpie-robin
(Copsychus
saularis)
as
model,
we
investigated
urban-rural
variation
length,
rate,
inter-syllable
interval.
Comparing
rural
from
7
countries
across
its
natural
Asiatic
range
(Bangladesh,
India,
Malaysia,
Nepal,
Singapore,
Sri
Lanka
Thailand),
found
no
significant
differences
complexity.
However,
variables
between
sites.
Longer
intervals
addition
to
slower
rates
within
sites
contributed
most
variance.
This
indicates
that
environment
may
have
driven
production
longer
maximize
efficient
transmission
important
information
Ornithology,
Journal Year:
2017,
Volume and Issue:
134(3), P. 564 - 574
Published: May 10, 2017
Vocal
communication
in
songbirds
is
important
for
aggressive
signaling,
such
that
an
honest
signal
allows
receivers
to
assess
a
competitor's
qualities.
One
aspect
of
song
conspecifics
may
vocal
performance.
An
example
performance
how
well
individual
performs
the
trade-off
between
trill
rate
and
bandwidth
production
repeated
notes.
This
type
(vocal
deviation)
thought
be
because
male's
ability
maximize
both
limited
by
motor
constraints
on
sound
modification.
Further,
male
can
repeat
this
provide
with
information
about
signaler,
own
level
affect
strength
response
high-performance
songs.
We
tested
whether
males
each
other
based
model
species,
White-crowned
Sparrow
(Zonotrichia
leucophrys).
show
Sparrows
respond
more
strongly
songs
than
lower-performance
2
different
locations,
supporting
hypothesis
utilize
competitors.
also
initial
evidence
varies
among
repeatable
within
individuals.
acta ethologica,
Journal Year:
2024,
Volume and Issue:
27(1), P. 13 - 25
Published: Jan. 5, 2024
Abstract
Traffic
noise
is
a
pervasive
pollutant
that
affects
wildlife
at
individual
and
group
levels
through
mechanisms
such
as
disrupting
communication,
affecting
antipredator
strategy,
and/or
changing
how
they
use
space
within
habitat.
Urbanization
expanding
rapidly—few
places
remain
untouched
by
anthropogenic
disturbance—so
understanding
the
implications
of
on
behavior
paramount
to
conservation
efforts.
We
asked
whether
traffic
could
change
social
network
metrics
in
flocks
captive
birds.
Specifically,
we
quantified
effects
playbacks
sociality
(weighted
degree,
number
partners
weighted
frequency
interactions
with
those
partners)
flock
clustering
(global
coefficient,
connectivity
neighbors).
In
this
study,
recorded
zebra
finches
(
Taeniopygia
guttata
)
before,
during,
after
an
experimental
introduction
two
treatments:
high-
lower-amplitude
noise.
Our
results
demonstrated
increased
response
both
high-amplitude
low-amplitude
treatments.
Additionally,
birds
treatment
spent
more
time
room
active
playback
during
whereas
decreased
closest
treatment.
Increased
influence
disease
transmission,
learning,
mating
dynamics.
suggest
future
studies
explore
driving
noise,
perceived
predation
risk,
vigilance,
cross-sensory
interference.
Ecosphere,
Journal Year:
2018,
Volume and Issue:
9(9)
Published: Sept. 1, 2018
Abstract
Anthropogenic
landscapes
and
soundscapes
impose
strong
selective
pressures
on
a
number
of
species,
which
can
manifest
in
changes
vocalizations,
foraging
strategies,
predator
vigilance,
reproductive
success.
However,
few
studies
have
examined
survival
rates,
major
component
fitness,
across
urban
soundscapes.
White‐crowned
sparrows
(
Zonotrichia
leucophrys
)
persist
both
rural
change
their
behavior
response
to
the
soundscape.
We
color‐banded
adult
white‐crowned
collected
noise
levels
territories
San
Francisco
Bay
Area
adjacent
Point
Reyes
National
Seashore
California.
mark‐encounter
data
territorial
males
from
2014
2017.
Using
Program
MARK
,
we
tested
effects
habitat
(urban/rural)
territory
level
annual
rates
body
condition.
predicted
that
condition
would
be
lower
habitats
decrease
with
increasing
background
territories.
found
estimates
vary
according
year,
higher
survival.
Noise
best
predict
condition,
such
soundscape
negatively
correlates
male
Taken
together,
landscape
shape
health
birds
near
cities.
Proceedings of the Royal Society B Biological Sciences,
Journal Year:
2020,
Volume and Issue:
287(1941), P. 20202122 - 20202122
Published: Dec. 16, 2020
Phenotypic
plasticity
plays
a
critical
role
in
adaptation
to
novel
environments.
Behavioural
enables
more
rapid
responses
unfamiliar
conditions
than
evolution
by
natural
selection.
Urban
ecosystems
are
one
such
environment
which
behavioural
has
been
documented.
However,
whether
is
adaptive,
and
if
convergent
among
urban
populations,
poorly
understood.
We
studied
the
nesting
biology
of
an
‘urban-adapter’
species,
dark-eyed
junco
(
Junco
hyemalis
),
understand
adapting
city
life.
examined
(i)
behaviours
(ii)
pairs
modify
nest
characteristics
response
prior
outcomes,
(iii)
two
populations
exhibit
similar
behaviour.
monitored
170
nests
Los
Angeles
compared
our
results
with
research
on
579
from
San
Diego.
found
that
placed
ecologically
locations
(off-ground
artificial
surfaces)
increased
fitness,
practiced
informed
re-nesting
site
The
population
frequently
nested
off-ground
Diego
exhibited
higher
success
rate.
Our
findings
suggest
facilitates
environments,
drivers
behind
complex
multifaceted.
The Journal of the Acoustical Society of America,
Journal Year:
2017,
Volume and Issue:
142(1), P. 146 - 150
Published: July 1, 2017
Bats
can
actively
adjust
their
echolocation
signals
to
specific
habitats
and
tasks,
yet
it
is
not
known
if
bats
also
modify
calls
decrease
atmospheric
attenuation.
Here
the
authors
test
hypothesis
that
individuals
emit
ideally
suited
current
conditions
of
temperature
humidity.
The
recorded
two
species,
Molossus
molossus
Molossops
temminckii,
in
field
under
different
humidity
temperature.
For
each
were
analyzed:
shorter
frequency
modulated
(FM)
emitted
as
they
approached
recording
microphone,
longer
constant
(CF)
thereafter.
signal,
extracted
peak
duration,
compared
these
parameters
among
call
type,
environmental
conditions.
authors'
results
show
significant
differences
duration
for
both
types.
decreased
increased
CF
attenuation
increased;
using
a
lower-frequency
may
increase
range
detection
by
few
meters
increases.
same
trend
was
observed
FM
calls,
which
be
explained
primary
role
short-range
target
localization.
