<e>Rabbi Yaakov Weinberg points out that these two particular mitzvos, honoring ones parents and sending away the mother bird, are rewarded with long life.
He as well as most other Meforshim forgot to comment on the 3rd Mitzwah whose observance also carried Arichas Yomim, that of just weights, which come in same Sidra of Ki-Setzei as does Shiluach haKein.
Can someone explain why this 3rd Mitzwah is not also mentioned in conjunction with Arichas Yomim when discussing Shiluach haKein verses Kibud Ov v’Eim?