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In his 2012 essay, "Joyas Voladares," author Brian Doyle asserts the clear differences yet also the complex similarities shared by all living things. Doyle develops this assertion through sequencing, as he describes the daily struggle in the life of a mockingbird, before showing just how similar in emotion it is to the blue whale: a creature thousands of times larger than it. Doyle's purpose in writing is to bring a sense of realization to the suffering shared by all of us in order to establish the fundamental similarities that come with being alive. Doyle establishes a formal relationship with the audience by reminding them that, though life may be full of suffering and hardship, one cannot feel negative emotions without having experienced something positive before, a sign that everyone should live life to the fullest and best way they can.

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Brian Doyle is an author known for his collection of essays "One long river song," and here, he attempts to speak on behalf of not only hummingbirds, but all animals that are otherwise overlooked in the world. He provides understanding over the differences between humans and the rest of life on earth. It can be assumed that Doyle had experienced much loss throughout his life and, as a person with cancer, was able to empathize with wild animals whom are also perceived to be helpless.

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In writing, Brian Doyle's purpose is to draw people to the idea that all living things are fundamentally similar. No matter how big or small, all living things are similar physically as they all have a heart that keeps them alive and pumps blood throughout the body. On a philosophical level, all beings are the same in that we all have complex emotions: we all feel pain and experience loss, we all grow and develop. Doyle hopes to enforce the idea of empathy in the viewer when thinking of the value of other living things.

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Doyle attempts to connect with those that feel they lack motivation and purpose in life. Even though animals like hummingbirds are small and live a rough life just trying to find enough food to get by each day, they are still motivated to keep going. All living beings experience pain, yet all are able to push past it in order to live life to the fullest and to feel love and have children who will experience the same things in life; pain can't be experienced without first having felt happiness once before.

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The essay, published in 2012, concurred with the tragedy of Hurricane Sandy, which happened the same year. While many were speaking of the damage caused by the storm in at the cost of human society, the damage done to wildlife went unmentioned in the aftermath. Doyle could have been inspired to write a call of action to raise awareness of the damage that had been ignored in the animal kingdom for so long; he wished to give a voice to those that had none.

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Bryan Doyle felt the need to write on the topic of hearts because his son was born with 3 out of 4 chambers in his heart. Not only that, but he was diagnosed with brain cancer, which could have brought him to the theme of living life to the fullest.

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Doyle describes the daily struggle of the hummingbird first to make the viewer feel sympathy for the creature before subverting expectations by revealing that it is not that much different from a creature thousands of times larger than it. Doyle then uses this same idea when building up the differences of the hearts in each organism before defaulting back to similarities in saying "we all churn inside." He describes the difference in life patterns between species, yet still acknowledges the similarity of suffering in all living things in the conclusion of his essay.

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Doyle uses anaphora when describing how "a hummingbird’s heart beats ten times a second. A hummingbird’s heart is the size of a pencil eraser. A hummingbird’s heart is a lot of the hummingbird," as well as how "they can dive at sixty miles an hour. They can fly backwards. They can fly more than five hundred miles without pausing to rest. But when they rest they come close to death." This brings attention to not only the importance of the heart, though also the struggles that certain creatures have to go through on a daily basis to survive. The same point is conveyed through his use of metaphors in how the birds "drive those metabolisms they have race-car hearts that eat oxygen at an eye-popping rate," how "You burn out. You fry the machine. You melt the engine."
Finally, Doyle uses these devices one last time to bring attention to the similarity in all living things no matter how big or small as "so much held in a heart in a lifetime. So much held in a heart in a day, an hour, a moment. We are utterly open with no one in the end—not mother and father, not wife or husband, not lover, not child, not friend. We open windows to each but we live alone in the house of the heart. Perhaps we must. Perhaps we could not bear to be so naked, for fear of a constantly harrowed heart."

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Throughout the essay, Doyle provokes the reader to feel both sorrow and joy as he talks about breaking down barriers between the writer and the reader, making the reader feel vulnerable. Doyle also uses facts to describe the humming bird and how magnificent it is. He talks about how the humming bird can "dive at sixty miles an hour" and " can fly more than five hundred miles" appealing to the incredible abilities the humming bird is capable of.

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When speaking about the heart, Doyle gives off a sort of regretful tone by going in depth as he talks about his emotions which makes it seem like he has gone through sadness and pain. Doyle wanted the audience to feel sorrow so the reader could truly understand how fragile the heart really is. His tone shifts in the last paragraph where he tries to tell the reader to live life and feel emotion.