<s>
A	O
camera	B-Algorithm
trap	I-Algorithm
is	O
a	O
camera	O
that	O
is	O
automatically	O
triggered	O
by	O
a	O
change	O
in	O
some	O
activity	O
in	O
its	O
vicinity	O
,	O
like	O
presence	O
of	O
an	O
animal	O
or	O
a	O
human	O
being	O
.	O
</s>
<s>
It	O
is	O
typically	O
equipped	O
with	O
a	O
motion	B-Device
sensor	I-Device
–	O
usually	O
a	O
passive	O
infrared	O
(	O
PIR	O
)	O
sensor	O
or	O
an	O
active	O
infrared	O
(	O
AIR	O
)	O
sensor	O
using	O
an	O
infrared	O
light	O
beam	O
.	O
</s>
<s>
Camera	B-Algorithm
traps	I-Algorithm
,	O
also	O
known	O
as	O
trail	O
cameras	O
,	O
are	O
used	O
to	O
capture	O
images	O
of	O
wildlife	O
with	O
as	O
little	O
human	O
interference	O
as	O
possible	O
.	O
</s>
<s>
Hunting	O
has	O
played	O
an	O
important	O
role	O
in	O
development	O
of	O
camera	B-Algorithm
traps	I-Algorithm
,	O
since	O
hunters	O
use	O
them	O
to	O
scout	O
for	O
game	O
.	O
</s>
<s>
The	O
great	O
advantage	O
of	O
camera	B-Algorithm
traps	I-Algorithm
is	O
that	O
they	O
can	O
record	O
very	O
accurate	O
data	O
without	O
disturbing	O
the	O
photographed	O
animal	O
.	O
</s>
<s>
Besides	O
olfactory	O
and	O
acoustic	O
cues	O
,	O
camera	O
flash	O
may	O
scare	O
animals	O
so	O
that	O
they	O
avoid	O
or	O
destroy	O
camera	B-Algorithm
traps	I-Algorithm
.	O
</s>
<s>
Camera	B-Algorithm
traps	I-Algorithm
are	O
also	O
helpful	O
in	O
quantifying	O
the	O
number	O
of	O
different	O
species	O
in	O
an	O
area	O
;	O
this	O
is	O
a	O
more	O
effective	O
method	O
than	O
attempting	O
to	O
count	O
by	O
hand	O
every	O
individual	O
organism	O
in	O
a	O
field	O
.	O
</s>
<s>
By	O
using	O
camera	B-Algorithm
traps	I-Algorithm
,	O
the	O
well-being	O
and	O
survival	O
rate	O
of	O
animals	O
can	O
be	O
observed	O
over	O
time	O
.	O
</s>
<s>
Camera	B-Algorithm
traps	I-Algorithm
are	O
helpful	O
in	O
determining	O
behavioral	O
and	O
activity	O
patterns	O
of	O
animals	O
,	O
such	O
as	O
which	O
time	O
of	O
day	O
they	O
visit	O
mineral	O
licks	O
.	O
</s>
<s>
Camera	B-Algorithm
traps	I-Algorithm
are	O
also	O
useful	O
to	O
record	O
animal	O
migrations	O
.	O
</s>
<s>
Today	O
,	O
more	O
advanced	O
cameras	O
utilize	O
digital	B-Application
photography	I-Application
,	O
sending	O
photos	O
directly	O
to	O
a	O
computer	O
.	O
</s>
<s>
Video	O
is	O
also	O
an	O
emerging	O
option	O
in	O
camera	B-Algorithm
traps	I-Algorithm
,	O
allowing	O
researchers	O
to	O
record	O
running	O
streams	O
of	O
video	O
and	O
to	O
document	O
animal	O
behavior	O
.	O
</s>
<s>
Weather	O
proof	O
and	O
waterproof	O
housing	O
for	O
camera	B-Algorithm
traps	I-Algorithm
protect	O
the	O
equipment	O
from	O
damage	O
and	O
disguise	O
the	O
equipment	O
from	O
animals	O
.	O
</s>
<s>
Humidity	O
has	O
a	O
highly	O
negative	O
effect	O
on	O
camera	B-Algorithm
traps	I-Algorithm
and	O
can	O
result	O
in	O
camera	O
malfunction	O
.	O
</s>
<s>
As	O
far	O
as	O
problems	O
with	O
camera	B-Algorithm
traps	I-Algorithm
,	O
it	O
cannot	O
be	O
overlooked	O
that	O
sometimes	O
the	O
subjects	O
themselves	O
negatively	O
affect	O
the	O
research	O
.	O
</s>
<s>
Local	O
people	O
sometimes	O
use	O
the	O
same	O
game	O
trails	O
as	O
wildlife	O
,	O
and	O
hence	O
are	O
also	O
photographed	O
by	O
camera	B-Algorithm
traps	I-Algorithm
placed	O
along	O
these	O
trails	O
.	O
</s>
<s>
This	O
can	O
make	O
camera	B-Algorithm
traps	I-Algorithm
a	O
useful	O
tool	O
for	O
anti-poaching	O
or	O
other	O
law	O
enforcement	O
effort	O
.	O
</s>
<s>
One	O
of	O
the	O
most	O
important	O
things	O
to	O
consider	O
when	O
setting	O
up	O
camera	B-Algorithm
traps	I-Algorithm
is	O
choosing	O
the	O
location	O
in	O
order	O
to	O
get	O
the	O
best	O
results	O
.	O
</s>
<s>
Camera	B-Algorithm
traps	I-Algorithm
near	O
mineral	O
licks	O
or	O
along	O
game	O
trails	O
,	O
where	O
it	O
is	O
more	O
likely	O
that	O
animals	O
will	O
visit	O
frequently	O
,	O
are	O
normally	O
seen	O
.	O
</s>
<s>
These	O
locations	O
for	O
camera	B-Algorithm
traps	I-Algorithm
also	O
allow	O
for	O
variety	O
of	O
animals	O
who	O
show	O
up	O
at	O
different	O
times	O
and	O
use	O
the	O
licks	O
in	O
different	O
ways	O
allowing	O
for	O
the	O
study	O
of	O
animal	O
behavior	O
.	O
</s>
<s>
However	O
,	O
for	O
most	O
medium	O
and	O
large-bodied	O
terrestrial	O
species	O
camera	B-Algorithm
traps	I-Algorithm
have	O
proven	O
to	O
be	O
a	O
successful	O
tool	O
for	O
study	O
.	O
</s>
