RAVEN, what nature says about them.

The RAVEN is considered to be ONE OF THE MOST INTELLIGENT, ADAPTABLE  and  RE-SOURCEFUL of all birds.
In view of this and its FLYING STRENGTH and ABILITY to SURVIVE on a WIDE VARIETY of
FOOD, including carrion, the RAVEN was an apt candidate for being the FIRST CREATURE TO BE SENT OUTSIDE the ARK by NOAH at the time THE WATERS of the FLOOD had begun to
RECEDE. The text in the Scriptures, Genesis 8 : 5-7, indicates that the RAVEN thereafter remained outside the ark, using it only as a resting place.
The RAVEN, unlike the crow, is a bird of the WILDERNESS, inhabiting mountainous regions and even deserts. Ravens nest on cliffs or rocky headlands, as well as in tall trees; they MATE FOR LIFE and are DEVOTED PARENTS.

In the Scriptures, the Song of Solomon illustrates the beauty of ENDURANCE and constant LOVE.
Christ awoke the church with his calling. The church (Shulammite girl) having a taste of Christ's love is sick of love. A description of Christ by his graces.
The lock of the  door or gate, mentioned in the biblical passage, was fastened with a device consisted of a bolt of wood that could slide sideways through a groove in a wooden upright attached to the door.
The socket or hollow into which the bolt was inserted is referred to by the Shulammite girl (Christ's
bride) in recounting A DREAM she had in which her shepherd lover (heavenly bridegroom) was
kept away from her by means of a locked door.
Solomon's Song 5 :   4 My beloved slipped his hand through the latch-hole of the door, my heart turned
                                     over.
                                11 My beloved is white (fair) and ruddy (desirable), the chief of the chiefs among
                                     Ten Thousand.
                                12 His head is as the most fine gold, his locks are bushy and black as a raven.