No severe spreading infection became apparent.
Feather loss around some areas made the injuries look more dramatic than they ultimately proved to be.
The underlying tissue was healing.
As the wounds improved, the focus shifted from basic survival to function.
A Low Perch Became the Next Step
River was given a low perch once the feet, balance, and general condition were strong enough.
The perch was intentionally close to the floor.
The rehabilitation team wanted to see how the eagle gripped without creating significant risk if the bird slipped.
River stepped up.
Both feet closed around the perch.
The bird remained stable.
It shifted position.
The toes adjusted.
The wings made small balancing movements.
No obvious neurologic deficit became apparent.
The feet that had once been caught in line were now supporting the bird normally.
That was a major milestone.
The Wings Still Had to Prove Themselves
Normal X-rays did not guarantee normal flight.
River had spent an unknown amount of time flapping against restraint.
The muscles around the shoulders and wings could have been strained.
Soft tissues may remain painful after bones have been cleared.
The veterinary team watched natural wing stretching.
At first, movement was conservative.
Then the eagle began extending both sides more fully.
The wings returned to a normal resting position after stretching.
No persistent droop appeared.
No major delayed swelling followed.
Those findings suggested the bird was ready for a larger rehabilitation environment.
The First Flight Was Short but Controlled
River was transferred to a flight enclosure.
The bird was allowed to decide when to move.
No forced launch was used.
For a time, the eagle remained on the perch and watched the surroundings.
Then both wings opened.
River launched.
The first flight was not long.
But the wingbeats were reasonably symmetrical.
The bird reached another perch and landed.
The rehabilitation team immediately watched what happened afterward.
Would one wing droop?
Would the bird refuse to fly again?
Would exhaustion return quickly?
The answer was encouraging.
River rested.
Then moved again.
Repeated Flights Were More Important Than the First
Over the following days, the distances increased.
River flew between higher perches.
Turns became more controlled.
The bird gained altitude more efficiently.
Landings remained accurate.
The veterinary team continued watching the previously affected feet during each landing.
Both legs extended normally.
Both feet gripped.
There was no evidence that constriction injury had permanently compromised the toes.
This was critical.
An eagle that can fly but cannot land securely is not ready for release.
River increasingly demonstrated both abilities.
The Bird Also Had to Recover Endurance
Prolonged struggling can severely deplete an animal.
Even after wounds have healed, muscle fatigue and loss of conditioning may remain.
River therefore needed more than a few successful flights.
The eagle had to build endurance.
The rehabilitation team looked for:
repeated strong takeoffs,
sustained wingbeats,
normal recovery after exertion,
stable wing position,
accurate landings,
and continued appetite and body condition.
The bird’s performance improved steadily.
There was no indication that the entanglement had caused a permanent mechanical deficit.
Fishing Line Is Difficult for Wildlife to Detect
River’s case highlights a particular problem with monofilament fishing line.
It is thin.
Strong.
Often translucent.
And designed not to break easily.
Those qualities make it useful for fishing.
They also make it hazardous when lost or discarded.
A line caught in a tree can remain there long after an angler has left.
Wind and water can move it.
Branches can collect it.
Loops may form.
Wildlife may encounter it without seeing it.
Birds with curved feet and talons are especially vulnerable because the line can slip between the toes and then tighten when the bird pulls away.
Once wrapped around a branch and an animal at the same time, even a small amount of line can suspend a surprisingly large bird.
River was an adult Bald Eagle.
Its size and strength were not enough to break free.
Other Wildlife Faces the Same Hazard
Bald Eagles are not the only animals affected by discarded fishing tackle.
Ospreys frequently hunt around the same waters used by anglers.
Herons and egrets walk through shoreline vegetation.
Pelicans encounter line and hooks while feeding.
Waterfowl can become entangled around wings and legs.
Turtles can become caught in submerged line.
Small mammals may encounter coils left on shore.
The injuries vary.
Some animals develop constriction wounds.
Some swallow hooks.
Some drown.
Some become trapped in trees.
The common feature is that the material remains hazardous after human use has ended.
The Conservation Message Is Not Anti-Fishing
Recreational fishing and wildlife conservation do not have to conflict.
The practical message from River’s rescue is much narrower.
Lost or discarded line should be recovered whenever it can be done safely.
Broken line should not be left in coils near shore.
Hooks should be secured before disposal.
Fishing-line recycling containers can be used where available.
Snagged line should be retrieved when doing so does not create a safety risk for the angler.
These actions can prevent a relatively small piece of equipment from becoming a long-term wildlife hazard.
“The line that caught this eagle may have weighed almost nothing,” Bennett said. “But once it became anchored to that branch, it was strong enough to hold an adult Bald Eagle over the river.”
What People Should Do if They Find an Entangled Eagle
Avery’s decision to call rather than attempt the rescue himself was important.
An adult Bald Eagle is dangerous to handle.
A person entering a river to reach one also creates a separate risk.
And cutting line without controlling the bird can cause it to fall, tighten remaining loops, or injure itself further.
Anyone who finds a large raptor entangled should keep a safe distance and contact wildlife authorities or a licensed rehabilitation organization.
Provide the exact location.
Describe whether the bird is over land or water.
Note whether the animal is still moving.
Keep people and pets away.
Do not pull line from shore if the configuration is unknown.
The objective is to prevent additional struggle while trained responders organize a safe approach.
River’s Release Would Require More Than Healed Wounds
By the later stages of rehabilitation, the external injuries looked far less severe.
The abrasions had healed.
Swelling had resolved.
The damaged feathers had either realigned or remained sufficiently functional.
The bird could stand.
Grip.
Eat.
Fly.
But the team still required consistent performance.
Before release, River needed to demonstrate:
strong bilateral grip,
normal toe function,
full wing extension,
symmetrical wingbeats,
sustained flight,
controlled turns,
accurate landings,
appropriate body condition,
and normal avoidance of people.
A single successful flight would not be enough.
Wildlife rehabilitation depends on repeatability.
The Last Test Would Reverse the Original Scene
When Avery first saw River, the eagle was hanging beneath a branch with its head pointed toward the water.
Its feet were trapped above it.
Its wings could not generate useful flight.
Its own body weight pulled against the line.
A successful release would be the opposite of that scene.
The eagle would stand upright.
Choose when to move.
Open both wings.
Gain altitude.
Turn freely.
Extend both legs.
And land without anything attached to its body.
That contrast would represent the entire rehabilitation process.
The Most Important Moment Was the Phone Call
River’s rescue depended on several people.
Avery recognized that the bird was alive and called for professional help.
The wildlife hotline coordinated the response.
Bennett and Grant reached the eagle by boat.
The bird was controlled before the supporting line was cut.
The veterinary team removed the remaining strands and evaluated hidden injuries.
Rehabilitators monitored circulation, wounds, feather condition, grip, balance, and flight.
No single step guaranteed recovery.
But missing any one of them could have changed the outcome.
The Final Perspective
When River was first discovered above the St. Croix River, the Bald Eagle was not standing on a branch.
It was hanging beneath one.
Upside down.
Approximately four feet from shore.
Barely a foot above the water.
Fishing line had transformed an ordinary tree limb into a trap.
The eagle had already done what wild animals do when trapped.
It fought.
It pulled.
It flapped.
It tried to climb back toward the branch.
Those efforts did not free the bird.
They exhausted it.
By the time rescuers arrived, periods of violent struggling had been replaced by long intervals of stillness.
That stillness was not safety.
It was one of the reasons the rescue could not wait.
The team reached River by boat and controlled the eagle before cutting the line that supported its weight.
The bird was brought aboard instead of falling into the water.
At the wildlife center, radiographs brought encouraging news:
no major fracture.
But the case was not over.
The feet had to be monitored for constriction injury.
The wings had to recover from prolonged strain.
The wounds had to heal.
The damaged feathers had to remain functional.
And the exhaustion had to reverse.
Recovery happened gradually.
First the eagle stood.
Then it gripped.
Then it ate.
Then it stretched.
Then it perched.
Only after those basic functions returned did River fly again.
That progression is important because wildlife rehabilitation is not simply about removing whatever trapped the animal.
Cutting the fishing line ended the entanglement.
It did not prove that the eagle could survive.
That proof came later.
In strong feet.
In symmetrical wingbeats.
In controlled turns.
In accurate landings.
In a bird that no longer needed people.
River’s case leaves behind a simple lesson.
Discarded fishing line is small enough to overlook.
Strong enough to restrain a large raptor.
And persistent enough to remain dangerous long after the person who used it has gone home.
The best rescue is the one that never becomes necessary.
But when Thomas Avery looked across the river and realized the shape beneath the branch was an eagle still alive, one phone call gave that bird a chance to reach the point where the final line could eventually disappear from the story altogether.
Not hanging beneath a branch.
Not wrapped around a foot.
Not holding an eagle inches above the water.
Just open river below, open sky ahead, and nothing left between the bird and flight.