Related terms:
cavity nesters
coconino sandstone
geologic column
inner gorge
late mississippian
nest construction
horizontal tunnel
tonto group
streams flowing
picidae
soft ground
geologic record
machine used
mass wasting
cutter head
ploceidae
wryneck
incubating
piciformes
Wikipedia sources:
Bird nest
Woodpecker
Tunnel boring machine
KV20
Excavate
Geology of the Grand Canyon area
Context for words:
excavate
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