SENSO SMEEL 
instinct of the bird for offal to the sense of scent. The 
brain of the bird shows that it can have but little power 
of smell. For the olfactory lobes, those regions of the 
CONDOR. 
brain which are largely developed in keen-scented 
creatures, are exceedingly inconspicuous. The real 
explanation appears to be vision. A condor hard by 
the corpse detects it with ease while circling in the air 
189 
