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culvert
pigeon spring
microhabitat
sinkholes
robin nest
mine shaft
water spring
sett
tree's nest
hibernaculum
nest box
the wolf pit
fallen tree stump
mountain spring
ditch side
tree root
wishing well
vaulted cellar
water well
outfalls
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图片
GIF 动图
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pigeon spring
microhabitat
spring nest
hibernaculum
mine shaft
robin nest
tree's nest
fallen tree stump
nest box
water spring
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sewage pipe polluted water
outfalls
hibernaculum
ditch side
charcoal nest
microhabitat
pigeon spring
mining site
ectomycorrhizal
funnel web spider
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tree bark
uroplatus
hibernaculum
microhabitat
birch trunk
birch bark
wood structure
tree trunk
noctuidae
lasius
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the limestone cave entrance
caves
hibernaculum
cave church
souterrain
rockshelter
vaulted cellar
cavern
cave on the water
burial chamber
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rock cairn
hibernaculum
streambeds
pigeon spring
mountain spring
ditch side
microhabitat
fallen tree stump
streambank
gyromitra
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mine shaft
the limestone cave entrance
hibernaculum
vaulted cellar
microhabitat
charcoal kiln
charcoal nest
spring nest
crevice
hibernacula
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antechinus
hibernaculum
ditch side
sett
tapaculo
animal grave
microhabitat
in situ
tricholoma
red bellied black snake
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ditch side
cliff face
part of the ruins
limestone cliff
storm damage
the old roof
old wall
steep bank
viaducts
roof damage
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ditch side
microhabitat
streambeds
streambank
habitat
pigeon spring
steep bank
the brook
destroyed area
riparian zone
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black bears
the limestone cave entrance
rockshelter
mine shaft
cave on the water
sea caves
caves
caving
torii tunnel
cave people
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vaulted cellar
mine shaft
the limestone cave entrance
pigeon spring
ditch side
hole in the wall
holloways
microhabitat
bear footprint
mining site
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the limestone cave entrance
undergrounds
pigeon spring
cave on the water
mine shaft
vaulted cellar
temazcal
water spring
cave tour
crescent spring
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mountain spring
culvert
pigeon spring
microhabitat
runoff
water spring
running water
water basin
mountain stream
upper water
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outfalls
ditch side
streambank
a small waterfall
pigeon spring
the brook
water spring
kwalwasser
mountain spring
tributary
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caving
spelunking
mine shaft
undergrounds
the limestone cave entrance
cavern
cave tour
speleology
underpin
souterrain
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bear footprint
vaulted cellar
microhabitat
mine shaft
hibernaculum
the limestone cave entrance
temazcal
fairy chimney
pigeon spring
tree heart
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the limestone cave entrance
hibernaculum
microhabitat
karst area
ditch side
mine shaft
limestone cliff
burial mound
hibernacula
habitat
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cattle trough
gutter pipe
ditch side
drainage pipes
sewage pipe polluted water
irrigation system
water trough
drain pipe
stormwater
biofouling
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culvert
ditch side
the brook
pigeon spring
brook landscape
vollenhoven
watercourse
steep bank
tributary
gapstow bridge
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pigeon spring
water spring
mine shaft
water well
vaulted cellar
mountain spring
crescent spring
ny sewer
water basin
dnyaneshwar