Chullin 64 - July 3, 18 Tamuz

One may purchase eggs from a non-Jew if the seller explicitly specifies that they come from a particular kosher species. The Gemara asks why we cannot simply rely on the physical diagnostic signs of kosher eggs, which are: being pointed on one end and rounded on the other, and having the yolk (chalmon) on the inside with the albumen (chelbon, or white) on the outside. The Gemara explains that these signs alone are insufficient because certain non-kosher species (such as the crow) lay eggs that mimic these exact characteristics. Regarding blood found in an egg, the halakhic status depends entirely on its location: depending on where the blood spot is positioned, one either removes the blood spot alone or is forbidden from eating the entire egg. The Gemara presents two conflicting traditions regarding which specific location (the yolk or the albumen) triggers the stricter prohibition. The Gemara identifies the biblical source prohibiting the eggs of non-kosher birds, deriving it hermeneutically from the verse banning the "daughter of the ostrich" (bat ha-ya'anah), where the "daughter" is expounded to mean the egg of the ostrich.