תורים ובני יונה (turtledoves or of young pigeons)⁵⁹⁰ are two separate families of this species. The יונה (pigeon) is domestic; the תור (turtledove) is not. The תור is a bird that migrates but not the יונה.

footnotes: ⁵⁹⁰ Leviticus 1:14.

And בני יונה are the young of the species, like בן ראמים, בני צאן, בני נשר. And since it is always written תורים ובני יונה and it never reverses the order – this implies that תורים (turtledoves) are adults and בני יונה (young pigeons) are young.

According to Rule 199, the way of the Scripture is to always speak in such a way that if it mentions two things, the novelty will always be mentioned second. So since the Scripture always mentionsתורים before בני יונה*, it must mean thatבני יונהis the novelty. Suppose thatתורים(turtledoves) were to include young turtledoves. Thenבני יונה(young pigeons) would not be a novelty, a contradiction. Hence,תוריםmust include only adults whenever it is mentioned with*בני יונה⁵⁹¹.

footnotes: ⁵⁹¹ Malbim, HaTorah v’HaMitzvah Vayikra 74.