Shiva Purana
गृध्रः काकः कपोतश्च शिरश्चाक्रम्य तिष्ठति ॥ शीघ्रं तु म्रियते जंतुर्मासैकेन न संशयः ॥ २८ ॥
Surely the person dies soon within a month if a crow or a dove attacks him and settles on his head.
english translation
gRdhraH kAkaH kapotazca zirazcAkramya tiSThati ॥ zIghraM tu mriyate jaMturmAsaikena na saMzayaH ॥ 28 ॥
hk transliteration by Sanscript