BLM Oregon & Washington:
Derrick Cave
BLM Oregon & Washington:
Derrick Cave
BLM Oregon & Washington:
Derrick Cave
BLM Oregon & Washington:
Derrick Cave
BLM Oregon & Washington:
Derrick Cave
BLM Oregon & Washington:
Derrick Cave
BLM Oregon & Washington:
Searching for bat guano in Oregon caves
BLM Oregon & Washington:
Searching for bat guano in Oregon caves
BLM Oregon & Washington:
Searching for bat guano in Oregon caves
BLM Oregon & Washington:
Searching for bat guano in Oregon caves
BLM Oregon & Washington:
Searching for bat guano in Oregon caves