“Every Little Thing” is a documentary as delicate and magical as its subjects. It’s about hummingbirds who have suffered trauma — an adult injury, perhaps in “combat,” a baby who’s fallen from their tiny nests — and about one special Californian woman- , Wisconsin farmgirl transplant who has made helping them her life’s work.

Writer-director Sally Aitken (“Swimming with Sharks: The Valerie Taylor Story”) zeroes in on her subjects — assorted hummingbirds brought to Aitkens’ SoCal rehab — and their savior and champion, Terry Masaer — and plumbs the connection between damaged people who try to help animals, and the fragile/magical/miraculous creatures who flock to our flowers, and sugar-water feeders all spring and summer.

They flock and feed and fight, as the self-taught expert Masear notes.

“Hummingbirds live in the moment,” she marvels. “They live for now.”

That’s exultant in itself, but also the parameters of the challenge involved in saving one who might otherwise perish if Terry Masear’s hummingbird hotline didn’t exist. They don’t live long. You have even less time if you want to save one.

You don’t learn about the species of hummingbirds you can see out West, or the specie (rubythroated) we find up and down the East.

But you do learn about the stages of rehabilitating an injured bird, the “magic wand” — a perch stick Terry has kept as a talisman for readying a bird for release — and what not to do (spill sugar water on their wings) when you happen upon one injured in your corner of the world.

We meet Cactus — a baby injured by falling onto cactus thorns — Raisin, Sidney’s Twins, Jimmy, Mikhail and Alex, and we do a Beverly Hills ride along with Terry and Wasabi — all patients in her Beverly Hills rehab.

Well-intentioned — sometimes clumsy human “rescuers” are met, appreciated and sometimes criticized for their blunders.

Birds will live and some “won’t make it.”

And through it all, Aitken keeps her camera on the birds, their 50-beats-per-second horizontal and vertical flight captured in slow-mo and their syringe feedings (sugar water, and tiny insects), and on Masear, whose life from childhood through adolescence, college and beyond is related via interviews and home movies.

Because we want to know how Terry got here, what drives her and why she’s obsessed with “If I don’t do everything right, they die.”

It’s not like we learn all the secrets and make all the psychological connections via the film. But we “get” the attraction. I was taken back beyond the hilltop backyard we cover with feeders every spring to my first run-in with a cloud of ruby-throated daredevils, fighting over the many feeders set up in an abandoned general store by the water in Whitaker Creek, N.C., years ago.

Aitken’s made an adorable, often enchanting (Most every review uses that word. You can’t avoid it.) feel-good movie about magical animals that sometimes need the help of that rarest of people who know what to do to save them. She found the perfect title in the perfect song (by Bob Marley) to fit her subject.

And Masear makes a compelling, mysterious and stoic heroine, a woman who’s been through things and uses that life experience to connect with tiny, plucky long-distance-migrating birds in their hour of need.

“Magical realism” might be the best phrase anyone has ever used to described these diminutive wonders. Let’s hope that their migration schedule let them miss the devastating fires that hit climate-changed California this winter.

Rating: unrated, some profanity

Cast: Terry Masear

Credits: Scripted and directed by Sally Aitken. A Kino Lorber release.

Running time: 1:31