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If you find Bombus occidentalis, please contact bum
Visit ww
w.xerces.org/bum
blebees for more inform
ation.
Bom
bus bifarius (nearcticus)
Bom
bus morrisoni
Bom
bus melanopygus
Bom
bus nevadensis
Bom
bus mixtus
Bom
bus griseocollis
Bom
bus huntii
po
ck
et
gu
ide
to
ide
nt
ify
ing
th
e w
est
er
n
bu
mb
le
be
e
Bo
mb
us o
cc
ide
nta
lis
Photo by Derrick Ditchburn
Bom
bus bifarius
Bom
bus melanopygus
(edwardsii)
Found in the mountains and northern areas
Found in coastal areas
The western bum
ble bee was once com
monly found
in the western U
nited States and Canada. They can
still be found in northern and eastern parts of their historic range, but populations from
southern British
Colum
bia to central California have nearly disappeared
in recent years. Your efforts to search for this bee w
ill help document their current range. The Xerces
Society and scientists studying bumble bee decline
will use this inform
ation to promote conservation of
remaining B
. occidentalis populations.
Bom
bus appositus
Map based on Milliron 1971, A Monographof the Western Hemisphere Bumblebees.
other com
mon bum
ble bees of western n
orth Am
erica
There are around 30 bumble bee species present in w
estern North Am
erica. Females of som
e of the most
comm
only found bees are pictured here. Some species pictured have varieties w
ith different coloration.
For more identification inform
ation, visit ww
w.discoverlife.org and w
ww
.bugguide.net
ww
w.xerces.org/bum
blebees
TH
E XE
RC
ES S
OC
IET
Y F
OR
INV
ER
TE
BR
AT
E C
ON
SER
VA
TIO
N
Funding for bumble bee conservation provided by the C
S Fund.G
uide developed and illustrated by Elaine Evans, The Xerces Society.Thanks to D
r. Robbin Thorp, UC
Davis.
Bom
bus
calif
orni
cus
com
mon
fem
ale
Bom
bus o
ccid
enta
lis v
arie
ties
Bom
bus
suck
leyi
(cuc
koo
bee)
Bom
bus
fern
alda
e(c
ucko
o be
e)
sim
ilar
fem
ale
bees
wit
h ye
llow
on
the
4th
abdo
min
al s
egm
ent
Bom
bus
vosn
esen
skii
Bom
bus
insu
lari
s(c
ucko
o be
e)
Bom
bus
calig
inos
usB
ombu
s va
ndyk
ei
Thes
e lo
ok-a
-like
bee
s ha
ve y
ello
w h
air
on th
e 4t
h
abdo
min
al s
egm
ent,
as o
ppos
ed to
B. o
ccid
enta
lis
with
bla
ck o
r w
hite
hai
r on
the
4th
abd
omin
al
segm
ent.
Thes
e th
ree
varie
ties
of B
. occ
iden
talis
repr
esen
t the
m
ost
com
mon
ly f
ound
col
or p
atte
rns.
Som
e be
es
are
inte
rmed
iate
bet
wee
n th
ese
varie
ties.
sim
ilar
fem
ale
bees
wit
h y
ello
w o
n th
e he
ad
Nor
ther
n C
alifo
rnia
to
Brit
ish
Col
umbi
a,
east
to
Mon
tana
Rock
y M
ount
ains
to
Alas
ka
Cen
tral
coa
stal
C
alifo
rnia
Yello
w-h
eade
d be
eB
lack
-hea
ded
bee
Thes
e lo
ok-a
-like
bee
s ha
ve p
rom
inen
t ye
llow
hai
r on
the
fac
e, a
s op
pose
d to
B. o
ccid
enta
lis w
ith a
ll bl
ack
hair
on t
he f
ace.
Fem
ales
hav
e 6
abdo
min
al s
egm
ents
ver
sus
7 in
mal
es.
Fem
ales
hav
e 12
ant
enna
l seg
men
ts v
ersu
s 13
in m
ales
. Fe
mal
e hi
nd le
gs a
re w
ider
tha
n m
ale
hind
legs
.
Fem
ales
are
foun
d th
roug
h sp
ring,
sum
mer
and
ear
ly fa
ll.
Wor
kers
and
que
ens
are
both
fem
ale.
Mal
es c
an b
e co
mm
on i
n la
te s
umm
er a
nd e
arly
fal
l. Fe
mal
es h
ave
polle
n ba
sket
s (a
n in
dent
atio
n on
to w
hich
the
y so
met
imes
pa
ck p
olle
n) o
n th
eir
hind
leg
s, a
nd s
hort
er a
nten
nae
and
abdo
men
s. M
ales
som
etim
es h
ave
larg
er e
yes
and
long
er h
air.
Bum
ble
bees
pic
ture
d an
d de
scrib
ed i
n th
is
guid
e ar
e al
l fem
ale
bees
.
mal
e ab
dom
en7
segm
ents
fem
ale
abdo
men
6 se
gmen
ts
mal
e hi
nd le
g th
inne
r
mal
e an
tenn
a13
seg
men
tsfe
mal
e an
tenn
a12
seg
men
ts
fem
ale
hind
leg
wid
er
mal
e or
fem
ale
?h
istoric range of Bom
bus occidentalis
PO
CK
ET G
UID
E T
O IN
DE
NT
IFY
ING
TH
E R
UST
Y PA
TC
HE
D
BU
MB
LE B
EE
bo
mb
us a
ffinis
If you find Bom
bus affinis, please contact bumblebees@
xerces.org Visit w
ww
.xerces.org/bumblebees for m
ore information.
Bom
bus pensylvanicusB
ombus auricom
usThe rusty patched bum
ble bee was once com
mon
in the eastern United States and the upper M
idwest.
They can
still occasionally
be found
in isolated
patches, but B. affinis has disappeared from m
ost of its form
er range in recent years. Your efforts to search for this bee w
ill help document their current range.
The Xerces Society and scientists studying declining bum
ble bees will use this inform
ation to promote
conservation of remaining B. affinis populations.
Historic range of b
ombus affinis
Other com
mon bum
blebees of eastern North A
merica
There are around 20 bumble bee species present in eastern N
orth America. Fem
ales of some
of the most com
monly found bees are pictured here. Som
e species pictured have varieties w
ith different coloration.
For more identification inform
ation, visit ww
w.discoverlife.org and w
ww
.bugguide.net
Bom
bus ternariusB
ombus citrinus
(cuckoo bee)
Bom
bus fraternusB
ombus fervidus
Bom
bus rufocinctusB
ombus rufocinctus
Map based on Milliron 1971, A Monographof the Western Hemisphere Bumblebees.
Funding for bumble bee conservation provided by the C
S Fund.G
uide developed and illustrated by Elaine Evans, The Xerces Society.Thanks to D
r. Robbin Thorp, UC
Davis.
Sim
ilar b
ees w
itho
ut y
ello
w a
t the
re
ar o
f the
seco
nd a
bdom
inal
segm
ent
Fem
ales
hav
e 6
abdo
min
al s
egm
ents
ver
sus
7 in
mal
es.
Fem
ales
hav
e 12
ant
enna
l seg
men
ts v
ersu
s 13
in m
ales
. Fe
mal
e hi
nd le
gs a
re w
ider
tha
n m
ale
hind
legs
.
Fem
ales
are
fou
nd t
hrou
gh s
prin
g, s
umm
er,
and
early
fa
ll. W
orke
rs a
nd q
ueen
s ar
e bo
th f
emal
e. M
ales
can
be
co
mm
on
in
late
su
mm
er
and
early
fa
ll.
Fem
ales
ha
ve p
olle
n ba
sket
s (a
n in
dent
atio
n on
to w
hich
the
y so
met
imes
pac
k po
llen)
on
thei
r hi
nd l
egs,
and
sho
rter
an
tenn
ae a
nd a
bdom
ens.
Mal
es s
omet
imes
hav
e la
rger
ey
es a
nd lo
nger
hai
r.
mal
e ab
dom
en7
segm
ents
fem
ale
abdo
men
6 se
gmen
ts
mal
e hi
nd le
g th
inne
r
mal
e an
tenn
a13
seg
men
tsfe
mal
e an
tenn
a12
seg
men
ts
fem
ale
hind
leg
wid
er
Mal
e or
fem
ale
?
Bom
bus
gris
eoco
llis
Bom
bus
impa
tiens
Bom
bus
bim
acul
atus
Bom
bus
vaga
ns w
orke
r
Yello
w-h
eade
dlo
ng-f
aced
bee
Bla
ck-h
eade
d s
hort
-fac
ed b
ee
B.
affin
is
and
B.
vaga
ns
fem
ales
, an
d B.
ci
trin
us
mal
es h
ave
yello
w h
air
cove
ring
mos
t of
the
firs
t tw
o ab
dom
inal
seg
men
ts. H
owev
er, B
. affi
nis
wor
kers
hav
e a
rust
y pa
tch
on th
e se
cond
abd
omin
al s
egm
ent.
B. v
agan
s w
orke
rs a
nd B
. citr
inus
mal
es h
ave
yello
w h
air
on th
e to
p of
thei
r hea
ds w
hile
B. a
ffini
s ha
ve b
lack
hai
r on
the
top
of th
eir
head
s. In
add
ition
, B. v
agan
s ha
ve a
lo
nger
face
than
do
B. a
ffini
s.
Bom
bus
citr
inus
mal
e(c
ucko
o be
e)
Wor
kers
and
mal
es h
ave
a di
stin
ctiv
e ru
sty
brow
n pa
tch
on t
he f
ront
hal
f of
the
ir se
cond
abd
omin
al
segm
ent.
The
hair
on t
heir
head
s is
mos
tly b
lack
. O
n th
e th
orax
, bl
ack
hairs
ext
end
from
a c
entra
l pa
tch
in t
he m
iddl
e of
the
tho
rax
out
tow
ards
the
w
ings
and
cen
trally
in a
nar
row
V to
war
ds th
e re
ar.
Que
ens
are
sim
ilar
to
wor
kers
ex
cept
th
ey
are
larg
er
in
size
an
d do
no
t ha
ve th
e ru
sty
patc
h on
the
abd
omen
.
Que
en
Wor
ker
Mal
e
Iden
tify
ing
bom
bus a
ffini
sSi
mila
r be
es w
ith
yello
w a
t the
rear
of
the
seco
nd a
bdom
inal
seg
men
t
ww
w.xerces.org/bum
blebees
Photo by Johanna Jam
es-Heinz
TH
E XE
RC
ES S
OC
IET
Y F
OR
INV
ER
TE
BR
AT
E C
ON
SER
VA
TIO
N
po
ck
et
gu
ide
to
ide
nt
ify
ing
th
e y
el
lo
wb
an
de
d
bu
mb
le
be
eb
om
bu
s te
rr
ico
la
Photo by Jodi DeLong
The yellowbanded bum
ble bee was once com
monly
found throughout much of eastern N
orth America.
They can still be found occasionally in isolated patches, but B
. terricola has disappeared from m
ost of its form
er range in recent years. Your efforts to search for this bee w
ill help document their current
range. The Xerces Society and scientists studying bum
ble bee decline will use this inform
ation to prom
ote conservation of remaining yellow
banded bum
ble bee populations.
Map based on Milliron 1971, A Monograph of the Western Hemisphere Bumblebees.
other com
mon bum
ble bees of eastern north a
merica
Bom
bus ternariusB
ombus citrinus
(cuckoo bee)B
ombus vagans
Bom
bus griseocollis
Bom
bus fraternusB
ombus fervidus
Bom
bus impatiens
Bom
bus bimaculatus
If you find Bombus terricola, please contact bum
Visit ww
w.xerces.org/bum
blebees for more inform
ation.
historic range of b
ombus terricola
B. a
uric
omus
and
B
. pen
sylv
anic
us
B. t
erri
cola
Fem
ales
Wor
kers
and
que
ens
have
yel
low
on
the
fron
t of
the
tho
rax
as w
ell
as o
n ab
dom
inal
seg
men
ts
two
and
thre
e. T
he h
ead
and
othe
r ab
dom
inal
se
gmen
ts a
re b
lack
with
the
exc
eptio
n of
a f
ringe
of
bro
wni
sh
yello
w h
air
on t
he f
ar e
dge
of t
he
fifth
abd
omin
al s
egm
ent.
Que
ens
are
sim
ilar
to
wor
kers
exc
ept
they
are
lar
ger
in s
ize.
The
re i
s va
riatio
n in
col
orat
ion
acro
ss it
s ra
nge.
Sim
ilar
bum
ble
bees
Mal
e co
lora
tion
is s
imila
r to
fem
ales
, ex
cept
for
pa
tche
s of
long
pal
e ye
llow
hai
r on
the
top
of th
eir
head
s an
d th
e fr
ont
of t
heir
face
s.
Bom
bus
pens
ylva
nicu
sB
ombu
s au
rico
mus
B.
auri
com
us
hav
e ye
llow
hai
r on t
op o
f th
eir
hea
d.
B. p
ensy
lvan
icus
hav
e ye
llow
at
the
rear
edg
e of
the
ir fir
st a
bdom
inal
seg
men
t. B
. au
rico
mus
and
B
. pen
sylv
anic
us la
ck t
he fr
inge
of b
row
n ha
ir on
the
fif
th a
bdom
inal
seg
men
t pr
esen
t on
B. t
erri
cola
.
Mal
e B.
terr
icol
a ha
ve a
pro
min
ent p
atch
of y
ello
w h
air
on
the
front
of t
heir
face
s, w
hile
B. p
ensy
lvan
icus
hav
e m
ostly
bl
ack
hair
on t
he f
ront
of
thei
r fa
ces.
B. a
uric
omus
mal
es
have
muc
h la
rger
eye
s th
an B
. ter
ricol
a m
ales
.
Fem
ale
B. te
rric
ola
have
shor
t fac
es w
here
as B
. aur
icom
us
and
B. p
ensy
lvan
icus
hav
e lo
ng fa
ces.
Mal
es
B. a
uric
omus
B. t
erri
cola
B. p
ensy
lvan
icus
Wor
ker
Mal
e
iden
tify
ing
bom
bus t
erri
cola
Bom
bus
pens
ylva
nicu
sB
ombu
s au
rico
mus
Mal
es
Mal
e B
. aur
icom
us a
nd B
. pen
sylv
anic
us h
ave
yello
w
hair
alon
g th
e re
ar o
f th
e th
orax
whi
le B
. te
rric
ola
mal
es h
ave
blac
k ha
ir.
Fem
ales
Que
en
hea
ds o
f sim
ilar
bum
ble
bees
ww
w.xerces.org/bum
blebees
TH
E XE
RC
ES S
OC
IET
Y F
OR
INV
ER
TE
BR
AT
E C
ON
SER
VA
TIO
N
Fem
ales
hav
e 6
abdo
min
al s
egm
ents
ver
sus
7 in
mal
es.
Fem
ales
hav
e 12
ant
enna
l seg
men
ts v
ersu
s 13
in m
ales
. Fe
mal
e hi
nd le
gs a
re w
ider
tha
n m
ale
hind
legs
.
Fem
ales
are
fou
nd t
hrou
gh s
prin
g, s
umm
er,
and
early
fa
ll. W
orke
rs a
nd q
ueen
s ar
e bo
th f
emal
e. M
ales
can
be
co
mm
on
in
late
su
mm
er
and
early
fa
ll.
Fem
ales
ha
ve p
olle
n ba
sket
s (a
n in
dent
atio
n on
to w
hich
the
y so
met
imes
pac
k po
llen)
on
thei
r hi
nd l
egs,
and
sho
rter
an
tenn
ae a
nd a
bdom
ens.
Mal
es s
omet
imes
hav
e la
rger
ey
es a
nd lo
nger
hai
r.
mal
e ab
dom
en7
segm
ents
fem
ale
abdo
men
6 se
gmen
ts
mal
e hi
nd le
g th
inne
r
mal
e an
tenn
a13
seg
men
tsfe
mal
e an
tenn
a12
seg
men
ts
fem
ale
hind
leg
wid
er
mal
e or
fem
ale
?
Funding for bumble bee conservation provided by the C
S Fund.G
uide developed and illustrated by Elaine Evans, The Xerces Society.Thanks to D
r. Robbin Thorp, UC
Davis.
There are around 20 bumble bee species present in eastern N
orth America. Fem
ales of some
of the most com
monly found bees are pictured here. Som
e species pictured have varieties w
ith different coloration.
For more identification inform
ation, visit ww
w.discoverlife.org and w
ww
.bugguide.net
Fold in half along horizontal dotted line.
Fold accordion-style along three vertical dotted lines.
Folding instructions for Xerces Society bumble bee guides
Use borderless printing for best results.
