A word for a yellow bird in The Etymologies of the 1930s, apparently the species yellowhammer, derived from ᴹ✶asmalē as an elaboration of the root ᴹ√SMAL “yellow” (Ety/SMAL). Tolkien later changed this root to √MAL, but ammale might still be plausibly derived from that root.
Qenya
ambal
noun. shaped stone, flag [stone]
ambale
noun. yellow bird, yellow hammer
ambar
noun. fate
ammale
noun. yellow bird, ‘yellow hammer’
umbar
noun. fate, doom
A noun in The Etymologies of the 1930s glossed “shaped stone, flag” under the root ᴹ√MBAL (Ety/MBAL).