TT #169 · Parshas Shemini · Aliyah 5 · Passuk 31
Chabad.org — Vayikra Chapter 11 with Rashi
English: These are the impure among the swarming things; whoever touches them when dead shall be impure until evening.
Chullin 126b.
E-Daf.com — Chullin 126b (Tsurras Hadaf)
Textual extension — “The impure” includes an egg of an impure bird and a bone of a swarming creature, with impurity applying when it has reached the condition described.
The derashah includes an impure bird's egg and a sheretz bone, while limiting impurity to a formed egg and to material that can be touched.