2 adjectives to describe halcyon

Such was the ingenious arrangement of the thatch, that the birds were deceived, and, seeing there some grains to pilfer, red-beaked gulls, "arrhinisgas" of black plumage, and gray and white halcyons frequently came to rest upon it.

Ah, if a ripple break The stillness halcyon The star is gone!

2 adjectives to describe  halcyon