QUESTIONS OX OTTAl^TEH T. 



TIIK r.Ii:i> : ITS IM.ACK IN' XATrKK AND UKLATIoX To MAN. 



The Jhril's Phicr in Xdf xre (see Cliai)l<'r I. i)af;-es 1-5). — 

 llt>\v iiumy spt'C'ies of birds are known '. In what class are 

 tiny i»hu'i'(l ."* Nain(^ tlie classes of liij^her animals; that is, 

 niannnals, lishes. and reptiles. In Avhat respect does the 

 class l>irds ditl'er from all the other hig'her classes of ani- 

 mals ? t What place does the class birds occupy in the scale 

 of life i To what class are they most nearly related i 



Are birds the only higher animals that fiy ? Are they the 

 only ones that lay eggs i The only ones that incubate i 

 Wliat is the temperature of birds :' Of manmials ? Of 

 reptiles '. Have any living birds teeth i "What is the chief 

 peculiarity of ])irds ^ From what kind of ancestoi*s ai'e 

 birds believed to have descended:' ( )n what evidence is 

 this belief ba.sed :• 



Describe the ArclKe()j)tery.\. Where was it found : In 

 what ge(d()gic age did it live.' Ho birds vary much in 

 .structure i In habit .' 



Mention some varying habits of birds. 



Economic IieI((fio)is of Birds to M<(h (see L"hai)ter 1. 

 pages 5-9). — In what ways are birds useful to man '. AVhat 

 loss are insects estimated to inllict on our agricultural in- 

 t«'i-ests annually '. What birds catch insects on the wing :" 

 In the foliage i On the ti'ce trunks :' What kinds feed on 

 t«*rre.strial insects :" Describe Mi*. Forbush's observations 



* The tcaeliiT should defhu' the meaning of " C'las.s " : as, for ex- 

 ample, the class Mammalia, the class Ucptilia, etc. 



f For example, such extreme rei)resentatlves of (he class Aves 

 as the Ihnumingbinl and ()>ti-ich. i-csemble each other in more 

 respects than do, for iii»t.iii<r. thr I'.at and the Elephant in the 

 class Mammalia. 



