PLANTS THAT ABE CARRIED BY ANIMALS. 69 
and Virginia creeper. The hard, undigested seeds are 
mostly expelled from the mouth in pellets, shown in the 
illustration, and germi- 
nate more promptly than 
those untouched by birds. 
Bears are very fond of 
berries, and will scatter 
the seeds of service ber- 
ries, elder berries, choke- 
cherries, raspberries, and 
blackberries. 
42. Ants distribute 
some kinds of seeds. — 
Ants are numerous, 
strong, skillful, and in 
suitable weather are al- 
ways very busy. Their 
habits have been investigated, and it has been found that 
in some respects they are genuine farmers on a small 
scale. They have their slaves (not hired help) ; they feed 
their plant lice, remove 
them from place to 
place, and otherwise 
care for them, because 
the lice constitute one 
of the chief sources of 
their supply of sweet. They build roads and houses, and 
enjoy society after their fashion. They have use for 
Fig. 51. — Two views of a pellet of seeds and rub- 
bish from a crow. From bulletin No. 6, United 
States Department of Agriculture, Division of 
Ornithology and Mammology. 
Fig. 52. — Seed of bloodroot with caruncle or crest, 
which serves as a handle for ants to hold on to. 
Ant ready to take the seed. 
