276 



FIRST LESSONS IN ZOOLOGY 



^ 



ing out the sap. So the (.hfferent jDlaiit-fceding animals 

 ha\'c the mouth specially arranged 

 for one or the other of these ways. 

 Cattle and horses and sheep have 

 teeth for biting off and crushing 

 dr)' or green plant food, while 

 many insects, like the plant-lice 

 and various flower-bugs, have a 

 tin)', sharp, hollow beak, which 

 they thrust into a green leaf or 

 stem, and through which they suck 

 up the sap. Similarlywith those ani- 

 mals which feed on animal matter. 

 Lions, tigers, dogs, and cats have 

 strong teeth for tearing and broad 

 teeth for crushing the flesh of 

 other animals, while the mosquito, 

 flea, and other insects ^vhich live 

 principally on animal blood have 

 a piercing and sucking 

 beak. 



But animals must 

 first obtain their food. 

 Giraffes get theirs from 

 high trees and they 

 have wonderfully long 

 necks to enable them 

 to reach up ; the moths 

 and butterflies which 

 feed on nectar from 



Fic. 216.— SurkiiJt,r proboscis ..f a sphinx- flo^'Crs have long, 



moth; in small f^sjure the pn,l,o.c„ is ^l^^^.l^r sucking-tubes 



sliown coilrtl up on tlM_- iniMiT snii.- 01 th(_- '^ 



lirail, tlie normal ])ositi(jn when not in use;. with wllicll to reacll 



(Onr-lialf natuiMl size; from siH(imcin) , j_ j_i 1 r 



' down to the base of a 



flower-cup. The common hawk-moths or humming-bird 



