25-' 



TIIK \ AKIKI) TIlKlSll* 



advantage i>f kiMwiii)^' iliat in mflcr t<> si-curc ailc<|iiatt* siipixirl tlic bird must 

 build close uj) to the stem of tlie tree. Tlie only excc|)tion to this rule is when 

 branches intersect, and so olTer additional strength. Owing to the fact that 



M Al.l. I-IK rHKK" 



the large timber aHords ciuisiderable protection to the younger growth below, 

 and because of the superior construction of the nests, they prove very durable. 



