The slow-motion footage in “Each Little Factor” of hummingbirds captured in flight, or beak deep in a flowering bud or hovering at 50 beats per second are awe-nudging. Director Sally Aitken’s nature documentary comes as a balm in a season aching for uplift. Since 2008, hummingbird sage Terry Masear has run a hotline, answering the calls of strangers who discover the iridescently feathered, delicate, surprisingly daring birds wounded or unconscious of their swimming pools, on roadways, laying beneath bushes. There have been extra that 20,000 calls.

Like pilgrims brimming with worry and hope, Angelenos convey their valuable items to Masear’s dwelling within the hills of Los Angeles. “It’s delicate, emotional work,” rehabbing these birds, says somebody on the radio because the hummingbirds start their migration to the world the place they nest.

As fascinating because the documentary’s slow-motion photographs are (gorgeous wildlife images by Ann Johnson Prum), hummingbird lovers know that there’s something equally if no more magnificent within the pace of their flight, the electrical click on and whirr that alerts their nearness.

As with a number of latest documentaries that includes animals, a substantial amount of the movie’s marvel comes by the use of the human-animal interface: right here, the temporary and deep relationship of Masear to her wards and people who discover them. Not solely is the curly-haired, polo shirt-wearing wildlife rehabber a beacon to those that discover troubled birds, she is commonly soother of their trepidations. A younger girl named Sidney brings two nestlings to the home. “The Sidney Twins,” as Masear calls them, are in a teeny nest nonetheless connected to a department which is nestled in a field. As she examines the pair, Masear sweetly factors out blond strands of hair — Sidney’s — woven into the nest.

Peak season, April by means of July, retains her busy. She walks a person named Alejandro by means of a dilemma: A chook has gotten inside his dwelling and is thumping in opposition to a skylight. The tales of Jimmy, the twins, Charlie and Raisin aren’t with out pathos. The attractive little chook christened Cactus seems prefer it’s been quilled by a porcupine; it had a run-in with a cactus and the spines have pierced its wings. As Masear says to the filmmaker, the prognosis is “fairly grim.”

Masear wrote the 2015 e-book “Quickest Issues on Wings: Rescuing Hummingbirds in Hollywood” that feeds the movie. Aitken turns that inspiration into an act of translation, the brand new kind honoring the truths of prior insights. Very similar to that nest with the strands of Sidney’s blond hair, Masear’s biography is woven into the narrative.

The movie begins with a house film picture of a lady bounding down a rocky hill. Her arms windmill just like the hummingbirds’ wings shot in slo-mo. Aitken teases our curiosity with lyrical photographs. It’s practically mid-film earlier than Aitken begins to share Masear’s previous in a extra conventional vogue. She grew up in rural southern Wisconsin. She was stressed. She headed to Los Angeles, a spot with out boundaries, the place the place she met her husband, Frank. There’s extra to the couple’s story that seems to have laid the muse for Masear’s Samaritan labor.

“I attempt to not bond,” she says, considerably unconvincingly. “As a result of it’s too painful.” Naming is one type of attachment. Viewers are certain to kind emotions for Jimmy, Charlie, Raisin, Mikhail, Alexa and Cactus. There’s additionally Sugar Child, whose wings have practically disintegrated as a result of its “rescuer” didn’t know easy methods to look after hummingbirds. Not everybody who contacts Masear tells the reality about how the birds wound up in a wounded situation, which makes her indignant. “This one chook is a mirror of their perspective about all of the pure world,” she says.

There can be arrivals and there can be departures. But the film overflows with fondness and hope, amid losses and liberations. “I don’t measure the success of the rescue by the end result,” Masear later admits. “However by the compassion.”

Masear says philosophically, “Life is a sequence of metaphors stacked up on one another.” But, she and her director (maker of “Enjoying With Sharks,” one other documentary that includes a feminine protagonist) know there are methods to be taught from animals that don’t fall again on simple anthropomorphizing. Even so, they make room for our pattern-seeking, storytelling instincts. “Each Little Factor” stirs insights and a way of awe because it focuses on particular characters but additionally takes flight towards broader connection. Use of drone footage hovering above L.A. reminds viewers of the vastness of Los Angeles but additionally the pleasant diminutive residents it’s a dwelling or a stopover to.

The musical rating, by Aitken’s frequent collaborator Caitlin Yeo, twinkles with the promise of one thing magical. It delivers many times on that. At first of the movie, Masear tells a teeny passenger named Wasabi that they’re “protected, completely protected.” By film’s finish, Masear’s dedication and tenderness have made that declaration a sacred and unimpeachable vow.