Boyd’s Bible Dictionary:
A large, long-necked, heron-like bird, of gray plumage, noisy on the wing (Isa. 38:14; Jer. 8:7).
Concise Bible Dictionary:
Common Crane
Two things are said of this bird in scripture: it chatters or makes a querulous noise (Isa. 38:14); and it knows its time of migration (Jer. 8:7). The common crane answers to both of these characteristics. In the above passages the swallow is mentioned after the crane, the Hebrew words being sis and agur; many hold that the translators have transposed the words, and that sis refers to the swallow, and agur to the crane. It is so translated by the Revisers and by Mr. Darby.