SEALED ENTRANCE 
Figure 35. — Mound between harborage boxes 2 and 3. This depicts the initial appearance of a mound. When rocks are 
present in the soil they are deposited in an arc near the periphery of the mound. 
FENCE 
BURROW OF ¥378 MAY 24, 1949 
E.S.E. OF PASSAGE 2 
Figure 34. — A typical burrow system during its early stages of development. As discussed in the text, the history of this 
burrow reveals many of the behaviors which are associated with the initiation, construction, and utilization of a burrow. 
'TRAIL 
SITE OF SECURING 
ALL NESTING MATERIAL 
9 42- DAY OLD YOUNG 
5 FEET > 
FOOD CACHE 
35 
