Temura 20: Birds as Burnt Offerings

We continue the discussion of yesterday's Mishna regarding whether or not an inappropriate asham, guilt offering, should be sold immediately or should be sold only after she develops a mum, a blemish.  Rabbi Shimon believes that if a female is sacrificed as an ola, a burnt offering (a sacrifice brought only from male animals), it develops kedushat ha'guf, inherent sanctity.  This is because there is a case where an olat ha'of, a burnt offering brought from a bird.  

Rabbi Elazar ben Azaraif says that we should automatically bring an ola without defining which type: a tor, turtledove, or a ben-yona, pigeon.  In Vayikra (1:14), we learn that torim and b'nei yona may be brought as sacrifices.  Massechet Chullin (1:5) tells us that the tor can only be brought as an adult while the yona can only be brought immediately after hatching.  These are distinct periods of time (only four or five days after hatching, these birds are called adults).