Hint: streamer is one. Eagle: I heard your boast in the past...

Like a ship, over ship,
Boat into the river does not run aground,
Board hung a long flag,
Arctic light more vivid,
Investigation identified originate pedigree,
Convolvulus winding corn stalk,
Hang a few silk streamers,
Spring River Rapids voice transmission,
Inflation to the risk,
The flow is not on top of ice-breakers