"Birds" represent rational concepts in the external man and intellectual concepts in the internal man.

10245. 'Or when they approach the altar to minister, to burn a fire offering to Jehovah' means worship springing from the good of love. This is clear from the meaning of 'approaching the altar to minister' as representing the Lord in respect of the good of love, dealt with in 9964; and from the meaning of 'burning a fire offering to Jehovah' as worship springing from love of the Lord. For 'burning' or sacrificing means worship, 6905, 8936, and 'a fire offering to Jehovah' means that which springs from the Lord's Divine Love, 10055. For more about the implications of all this, see just above in 10242.