SL'n.IKCTIVK LKSSOXS. 81 



Oritjin nf Mit/rnhOii (('liaj)!* r 1 \', paj^cs S.S-dl). — Wliat 

 tlH*<^ry is lirrr advaiici-d to account for llic ori^'-iii of hii-d 

 iiU'^Tatioii i Wliat other animals mi^rrato .' What do 

 most auinials seek during,'- tlio period of rci)roduction ? 

 CJivc illustrations. Describe tlie mij^rations of c«'rtain sea 

 hirds. What has been tlie i)robable intluenee of the gla- 

 cial period on bird niij,'-ration ? Desci-ibe the route followed 

 by Hoboliidvs when iniirratin;>-. What does this illustrate? 

 In what manner does the miu'ration of bii'ds resemble the 

 lli<,'-ht of the (."arrier Pi^icon r 



TnK Voice of Birds. 



Soiif/ (Chapter V, i)aLre 02). — What is song- ? What is 

 its chief function .' Mention sevei-al ty])es of bird music. 

 To what does the song season correspond ? When and by 

 what species is it inaugurated ? When is it practically 

 concluded .' Is there a second song ])eriod '1 What birds 

 liixt cease singing :" What birds are midsummer singers ? 



Call-nofe.s (Chapter V. i)age 05). — What is the relation 

 of call-notes to song .' What do the calls of the Ro])in 

 exj)ress :" Do bii'ds iidierit the calls and songs ? Do they 

 ever acquire the notes of other species { 



TiiK Ni:sTiN<i Si-:as()N. 



Time of XcsfiiKj tC\\n[){vv \l. page 04). — At what season 

 do migratory birds nest i When do troi)ical birds nest? 

 Why are birds obliged to nest at a cei-taiii season :" Give 

 some examples illusti'ating the relation between nesting 

 time and food. 



Mdfiuf/ {i'\\^A\t{^'\• \'l, i»age O.')). — (See page 4."i. Synopsis 

 of the Se<'ondary Sexual Characters of Birds.) 



The Xt'sf (Chapter VI, pages Or>-OS).— What is the first 

 step in nest building t Mention .several sites in which birds 

 may lu'st. What is the chief desideratum ? Why can .sea 

 birds often lay theii* eggs in expo.sed places f How is tem- 

 )K'i'am«'nt shown in nesting ." Mention sevei'al kinds of 

 material used bv birds in nest-buildin;;. How have birds 



