{$mEDiAurl}
[*] whAt is thE mAin iDEA oF thE tAlk
A．BirDs DiFFEr in AppEArAnCE throughout thE worlD、
B、thE BEst DiEt For BirDs inCluDEs Both sEEDs AnD insECts．
C．thE BirD’s Bill is spECiAlizED to its prEFErrED DiEt．
D．BirDs hAvE A vAriEty oF intErEsting BEhAviors．