Chullin 63

Sugya Map

The sugya in Chullin 63a serves as the taxonomic locus classicus for the identification of non-kosher birds, transitioning from tannaitic classification to amoraic diagnostics. The core issues under debate encompass:

• The Taxonomy of Exclusion: Reconciling the parallel lists of forbidden birds in Leviticus 11:13-19 and Deuteronomy 14:12-18 to establish the exact tally of twenty-four non-kosher species.
• The Epistemology of Kashrut: The interplay between anatomical signs (simanim) and oral tradition (masoret), and the credibility of lay experts (hunters) versus halakhic authorities (sages).
• The Mechanics of Custom and Environment: How geographic proximity to forbidden species (such as the peres and ozniyya) impacts the local halakhic status of otherwise kosher birds (sakna'ei and batna'ei).

Nafka Mina (Halakhic Ramifications)

1. The Authority of a Single Witness (Ed Echad): Can a professional hunter (tzayad) establish the kashrut of a bird species for a community, or does this require a sage's validation?
2. Geographic Prohibition (Chshash d'Damye): Does the presence of a non-kosher bird in a specific region partition the halakhic status of a visually similar kosher bird, rendering it forbidden only in that locale?
3. The Nature of Bird Eggs (Simanei Beitzim): Under what conditions can we rely on a gentile’s identification of an egg, and how does the mechanism of "fear of exposure" (mirtat) operate in ritual law?

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Text Snapshot

בת מזגא חמרא שריא, וסימניך: יפה כח הבן מכח האב.
שקיתנא: אמר רב יהודה... סקנאי ובטנאי, באתרא דנהיגי לאכול אכלי, באתרא דנהיגי דלא לאכול לא אכלי...

The Gemara begins with a series of avian identifications and their associated mnemonic devices:

"But the bird called the bat mazga chamra [little wine pourer] is permitted. And your mnemonic to remember this is: 'The power of the son is greater than the power of the father' [yafeh koach haben mikoach ha'av]..." Chullin 63a

Linguistic and Grammatical Nuances

• "בת מזגא חמרא" (Bat Mazga Chamra): Rashi clarifies: "בת מזגא חמרא - זה שמה" ("Bat mazga chamra—this is its name").^1 The Steinsaltz commentary expands this linguistically: "העוף הנקרא בת מזגא חמרא [בת מוזגת היין] — שריא [מותר]" ("The bird called the daughter of the wine-pourer is permitted").^2 The word mazga (from the root m-z-g, to mix or pour) indicates a role. The parental bird (mazga chamra) is forbidden, while the offspring (bat mazga chamra) is permitted.
• "יפה כח הבן מכח האב" (The power of the son is greater than the power of the father): This is a legal loanword. As Rashi notes: "יפה כח הבן - הלכה היא בפרק כל הנשבעין בשבועות" ("'The power of the son is greater'—this is a halakha in the chapter Kol HaNishba'in in Shevuot [48b]").^3 The Haggahot Ya'avetz notes that this phrase is also employed in Chullin 49b.^4 Here, the legal principle that a successor or secondary claimant can occasionally secure a stronger legal position than their predecessor is poetically applied to taxonomy: the "child" bird escapes the prohibition of the "father" bird.
• "רחם" (Raham): Identified as the sherakrak. Rashi notes: "רחמים - מטר" ("Rahamim means rain").^5 The name of the bird (raham) is linguistically linked to the manifestation of divine mercy (rachamim), which in the agrarian reality of Eretz Yisrael is synonymous with rainfall.

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Readings

1. The Epistemic Clash: Rashi vs. Rambam on Masoret and Simanim

The Rishonim split on the necessity of a continuous oral tradition (masoret) to permit a bird.

Rashi argues that even if a bird exhibits all the positive anatomical signs detailed in the Mishna (an extra toe, a crop, and a peelable gizzard), and is known not to be a bird of prey (dores), we still cannot permit it unless we have an unbroken, active tradition identifying it as a kosher species.^6 This is due to our lack of expertise (ein anu beki'in) in identifying which birds are dores (predatory). Since a bird might prey only rarely or in private, anatomical signs alone cannot override the doubt of predation.

The Rambam, however, presents a different conceptual framework:

"Any bird that is known not to be a bird of prey, and has one of these three signs... is kosher... and we do not require a tradition for it."^7

For the Rambam, masoret is not an ontological component of kashrut; it is merely an epistemic shortcut. If an expert (baki) can definitively determine that a bird is not a dores, the anatomical signs are legally sufficient to permit it.

The chiddush of this debate lies in how we define the legal role of the hunter (tzayad) in our sugya. The Gemara states that "the hunter is deemed credible to say: 'My teacher conveyed to me that this bird is kosher'" Chullin 63a.

According to Rashi, the hunter is testifying to a masoret—he is delivering a chain of custody that satisfies our lack of expertise. According to the Rambam, the hunter is testifying to a fact—his professional expertise allows him to identify the bird's behavioral patterns (that it is not a dores), which then allows the physical simanim to function.

2. Haggahot Ya'avetz: The Mechanics of "Dwelling with the Pure"

The Gemara discusses the orev (crow) and the baraita's inclusion of "the crow that comes at the heads of pigeons" (orev d'ati b'resh yonei). The Haggahot Ya'avetz offers a profound reading of this passage:

"The one that dwells with the pure is pure... even though the starling (zarzir) is kosher according to the Rabbis, that is because it does not resemble the crow."^8

The Ya'avetz is grappling with a classic talmudic principle found in Baba Kamma 92b: "A bird does not dwell near another unless it is of its own kind" (lo chibar zarzir eitzal orev ela mipnei she'hu mino). If the starling associates with the crow, it should be forbidden.

The Ya'avetz’s chiddush is that "dwelling with" is not an absolute, irreversible taxonomic proof. Rather, it is a default heuristic. If a bird dwells with a kosher species (like the pigeon), we assume it shares their dietary and behavioral characteristics, rendering it kosher.

However, this heuristic can be overridden by morphology. The crow that "comes at the head of pigeons" looks like a crow, but because of its association with pigeons, one might have thought it is kosher. The Torah therefore writes "after its kinds" Leviticus 11:15 to include it in the prohibition, despite its peaceful cohabitation.

Conversely, the starling associates with the non-kosher crow, but because its internal anatomy and lack of predatory behavior are clear, the Rabbis permit it. The association is overridden by direct evidence.

3. Petach Einayim: The Metaphysics of the Raham Bird and Tzom Tammuz

The Gemara details the prophetic nature of the raham (the sherakrak): if it sits on something and makes a sherakrak sound, it is a sign of rain; if it sits on the ground and hisses, it is a sign of the Messiah Chullin 63a.

The Petach Einayim analyzes Rashi's definition of "mercy" as "rain" (matar) and addresses a structural difficulty raised by the Yashresh Yaakov:

"Why did Rashi not explain 'mercy has come to the world' as referring to the coming of the Messiah? Since the Gemara itself bifurcates the bird's actions—one action for rain and another for the Messiah—Rashi was forced by the internal logic of the sugya to limit the first stage strictly to rain."^9

This provides a deep insight into the nature of redemption. The Petach Einayim explains that rain (matar) is the physical precursor to spiritual redemption. The raham bird represents the gradual unfolding of divine mercy.

On this day of Tzom Tammuz, when we mourn the breaching of the walls of Jerusalem and the suspension of the daily offering, we reflect on the withdrawal of this mercy. The destruction was marked by the silencing of the shamir—the miraculous stone-cutting worm brought by the dukhifat to build the Temple without iron tools Chullin 63a.

The raham bird's transition from sitting on an elevated object (rain) to sitting directly on the ground (the Messiah) mirrors the movement from exile to redemption. When the bird sits on the earth, descending into the dust of our exile, and hisses (veshareik), it activates the verse: "I will hiss for them, and gather them" Zechariah 10:8. The mourning of Tammuz is not a static state of grief, but the necessary ground upon which the ultimate rahamim of redemption is cultivated.

[Mourning of Tammuz] ──> [Loss of Temple/Shamir] ──> [Descent of the Raham to the Ground] ──> [Messianic Gathering (Zechariah 10:8)]

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Friction

Kushya: The Mathematical Discrepancy of the Twenty-Four Birds

The Gemara attempts to reconcile Rav's statement that there are twenty-four non-kosher birds with the biblical text:

"If you refer to Leviticus, there are only twenty birds listed there. If you refer to Deuteronomy, there are only twenty-one... If you add the da'a... still there are only twenty-two." Chullin 63a

Rav Chisda resolves this by pointing to the four occurrences of the phrase "after its kinds" (le-minehu), which serve as amplifications (ribuyim), bringing the count to twenty-six. Abaye then reduces this count to twenty-four by establishing two identities:

1. The da'a (Leviticus) and the ra'a (Deuteronomy) are the same bird.
2. The ayya and the dayya are the same bird.

The immediate and devastating kushya is raised by Tosafot and the Rashba:^10 If the ayya and the dayya are the same species, why does the Torah write both names in Deuteronomy: "And the ra'a, and the ayya, and the dayya after its kinds" Deuteronomy 14:13?

The Gemara answers that this is "so as not to give a litigant room to argue"—i.e., to prevent someone from eating the bird because they call it by one name while the Torah prohibited it by another.

But if so, why does the Torah append the phrase "after its kinds" (le-minehu) to both names across the two books? If they are the same bird, the "kinds" of ayya are identical to the "kinds" of dayya. The duplication of the amplification is redundant!

Terutz: Category vs. Nomenclature

To resolve this, we must introduce a fundamental lomdisch distinction between nominal nomenclature and taxonomic categorization.

The Ritva explains that "after its kinds" does not simply multiply the specific species named; rather, it defines a taxonomic family (a genter or genus).^11

                       [Taxonomic Genus: Ayya/Dayya]
                                     │
                     ┌───────────────┴───────────────┐
                     ▼                               ▼
             [Sub-species A]                 [Sub-species B]
         (Known locally as Ayya)         (Known locally as Dayya)

When the Torah writes "after its kinds" next to ayya in Leviticus, it prohibits all sub-species of that family. However, because different regions used different names, a person in a "dayya-dominant" region might look at a sub-species of the ayya family and say: "This bird belongs to the dayya family, which is not written in Leviticus with the word 'kinds'!"

Therefore, Deuteronomy repeats the entire genus under its alternative name, dayya, and appends "after its kinds" to it as well.

The repetition is not a redundant mathematical multiplier (which would yield twenty-six); rather, it is a conceptual anchor. The Torah is teaching that the entire family of this bird—regardless of whether it is locally classified under the name ayya or dayya—is subject to the same taxonomic expansion.

The number twenty-four represents twenty-four distinct genera (families) of non-kosher birds, not twenty-four individual species. The internal mechanics of the "kinds" expansion apply to the family as a whole, resolving the mathematical discrepancy.

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Intertext

1. The Shamir and the Dukhifat: Chullin 63a vs. Gittin 68b

In our sugya, the dukhifat is identified as the bird "that brought the shamir to the Temple" Chullin 63a. This brief aggadic insertion refers directly to the expansive narrative in Gittin 68b, where King Solomon seeks the shamir—a miraculous, biological cutting agent—to carve the stones for the Beit HaMikdash without using iron, which is associated with weaponry and the shortening of human life.

In Gittin, Ashmedai (the king of demons) reveals that the shamir was entrusted by the Prince of the Sea to the dukhifat (the wild cock). The dukhifat swore an oath to protect the shamir and only used it to cleave barren mountains so it could plant seeds and create life. Solomon's general, Benaiah ben Jehoiada, captured the shamir by covering the dukhifat's nest with clear glass. The bird, unable to reach its chicks, was forced to bring the shamir to split the glass, at which point Benaiah seized it. The dukhifat, having violated its oath of safekeeping, strangled itself.

The conceptual link between these two sugyot is profound. In Chullin, the dukhifat is described physically: "its comb is bent [hodo kafut]." This physical description is not merely an anatomical marker; it is a manifestation of its character. The bent comb represents its submission to its oath and its role as a custodian of the shamir.

Furthermore, the shamir represents a state of nature that transcends the destructive force of iron. The Temple, which brings peace, cannot be constructed using materials of war. The dukhifat, a bird that lives in the wild and brings vegetation to barren rocks, is the natural partner for this constructive work. The loss of both the shamir and the dukhifat's custody over it mirrors the destruction of the Temple that we mark on Tzom Tammuz.

2. Shulchan Arukh, Yoreh Deah 82: The Codification of Aviary Kashrut

The practical application of our sugya is codified in the Shulchan Arukh:

[Mishnaic Signs (Simanim)] ──> [Amoraic Concern: Predation (Dores)] ──> [Rama's Rule: Masoret Required]

The Shulchan Arukh rules:

"The signs of a kosher bird are not written in the Torah, but the Sages said: any bird that is dores [a predator] is definitely non-kosher."^12

The Rama immediately appends his famous Ashkenazic ruling:

"And we do not eat any bird unless we have an unbroken tradition [masoret] that it is kosher."^13

This ruling directly traces back to our sugya’s discussion of the sakna'ei and batna'ei birds Chullin 63a, where the Gemara notes that in places where the peres and ozniyya (rare non-kosher birds) are found, otherwise kosher birds are forbidden because of visual similarity.

The Rama elevates this local concern to a universal halakhic principle: because we are no longer experts in the visual and behavioral differences between the twenty-four non-kosher species and their kosher lookalikes, we treat every region as a "place where the peres and ozniyya are found." Therefore, anatomical simanim alone are suspended, and only an active masoret can permit a bird.

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Psak/Practice

The Kashrut of the Turkey (Tarnegol Hodu)

The halakhic status of the turkey (Meleagris gallopavo) is one of the most famous applications of our sugya's principles in modern times. When European explorers discovered the Americas, they encountered the turkey—a bird with no possible historical masoret in Europe or the Middle East.

                      [The Turkey Challenge]
                                │
         ┌──────────────────────┴──────────────────────┐
         ▼                                             ▼
[Anatomical Signs]                             [The Rama's Rule]
- Has an extra toe                             - No historical masoret
- Has a crop                                   - Potential "Dores"?
- Peelable gizzard
- Non-predatory behavior
         │                                             │
         └──────────────────────┬──────────────────────┘
                                ▼
                       [Halakhic Resolution]
             - Accepted under "Chicken" genus extension
             - Widespread practice established kashrut

According to the strict letter of the Rama’s ruling, the turkey should be permanently forbidden, as it lacks a masoret. However, the common practice of Jews worldwide is to eat turkey. How was this justified?

1. The Genus Extension Argument: The Meishiv Davar argues that the turkey is morphologically and behaviorally so similar to the domestic chicken (tarnegol) that it does not require an independent masoret; it is included in the broad "chicken" category.^14
2. The Ex Post Facto Acceptance: The Aruch HaShulchan notes that once the bird was accepted by the Jewish masses under the assumption that it was kosher (partly due to confusion with the guinea fowl, which did have a masoret), the halakha does not retroactively forbid it if it possesses the three positive simanim and is observed to be non-predatory.^15 The de facto practice became the de jure masoret.

Meta-Psak Heuristic

This demonstrates a powerful meta-psak heuristic: custom can generate a tradition retroactively. Where there is no active contradiction to a Sinaitic prohibition (as the turkey has all kosher signs), the collective practice of the Jewish community is given the legal weight of an ancient masoret.

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Takeaway

Halakhic taxonomy is not merely a dry exercise in zoology, but a profound study of how visual reality, linguistic naming, and unbroken community traditions interact to reveal the boundaries of the sacred.