The original is fine; here is one more option: Sounds that I Hear 2 [A 2nd revision] The original is fine; here is one more option: Sounds that I Hear 2 [A 2nd revision]

ThisIt has already becomen decades ago by now, but around that time, there was a paircouple of birds coming almost every day and recitsinging an interesting song by the kitchen window. It has already been decades ago, but around that time, there was a couple of birds coming almost every day and singing an interesting song by the kitchen window.

This has already becomeIt was decades ago by now, but around that time there wasthere used to be a pair of birds comingthat came almost every day andto my kitchen window reciting an interesting song by the kitchen window. It was decades ago now, but there used to be a pair of birds that came almost every day to my kitchen window reciting an interesting song.

This has already become decades ago by now, but around that time there wasIt's been a long time now, but back then a pair of birds comingused to come by almost every day and recitwould sing an interesting song by the kitchen window. It's been a long time now, but back then a pair of birds used to come by almost every day and would sing an interesting song by the kitchen window.

This hwas already become decades ago by now, but around that time, there was a pair of birds comingwould come almost every day and recitinge an interesting song by the kitchen window. This was already decades ago now, but around that time, there was a pair of birds would come almost every day and recite an interesting song by the kitchen window.

The phrase "This has already become decades ago by now" is grammatically correct, but perhaps not the most natural choice. "This was already decades ago now" has a more recollective, storytelling nuance perhaps. I changed "coming" and "reciting" to "would come + recite" as this tense reinforces a repeated or habitual action in the past.

ThisIt has already becomen decades ago by now, but around that time, there was a pair of birds comingthat would come almost every day and recitinge an interesting song by the kitchen window. It has already been decades now, but around that time, there was a pair of birds that would come almost every day and recite an interesting song by the kitchen window.

This has already become decades ago by now, but around that time there was aCLEARER: For some decades now, pairs of birds cominghave come almost every day and recitto my my kitchen window, chirping an interesting song by the kitchen windows. CLEARER: For some decades now, pairs of birds have come almost every day to my my kitchen window, chirping interesting songs.

COMMENT: I am guessing than *more than one* pair of birds came over the years. Also, the plural "interesting songs" is better than "an interesting song" since they can sing *more than one* song.

They might have been inMaybe they were deep in thought. Maybe they were deep in thought.

The birds' name turned out to be 'mourning dove'. The birds' name turned out to be 'mourning dove'.

either is fine, or "it turns out the birds are called "mourning doves"

The birds' name turned out to be 'mourning dove'.[DELETE: This information has been mentioned already.] [DELETE: This information has been mentioned already.]

The birds' name turned out to be 'mourning dove'.

IFor a bird's name, that was a vrathery unexpected name to me because they sing with soft voices but in athat sounds humorous manner. For a bird's name, that was rather unexpected to me because they sing with soft voices that sounds humorous.

It was a very unexpected name to me because they sing with soft voices but in a humorous manner. It was a very unexpected name because they sing with soft voices but in a humorous manner.

the name was unexpected, judging from their soft but unusual singing?

It was a very unexpected name to me because they sing with soft voices but in a humorous mannerfunny way. It was a very unexpected name to me because they sing with soft voices but in a funny way.

It was a very unexpected name to me because they sing with soft voicessoftly but in a humorous manner. It was a very unexpected name to me because they sing softly but in a humorous manner.

It's not common to use "voice," "said," or other words like these for animals, I think. At least not in this context.

It was a very unexpected name toThat name surprised me because they siang with soft voices but in a, slightly humorous mannerways. That name surprised me because they sang with soft, slightly humorous ways.

They say hoot, hoot, hoot,hoot like owls, but inat a higher tone*, then once in the phrase it becomes about one octave higher and they say like 'He'a series of hoots, it becomes like a "He" but one octave higher. They hoot like owls, but at a higher tone*, then once in a series of hoots, it becomes like a "He" but one octave higher.

*pitch?

They say hoot, hoot, hoot, like owls, but in a higher tone, then once in the phrase it becomes about one octave higher and they sayit sounds like 'He'. They say hoot, hoot, hoot, like owls, but in a higher tone, then once in the phrase it becomes about one octave higher and it sounds like 'He'.

They say hoot, hoot, hoot, like owls, but in a higher tone, then once inbut after a few times the phrase it becomess raised about one octave higher and they sayand it sounds like 'He'. They say hoot, hoot, hoot, like owls, but in a higher tone, but after a few times the phrase is raised about one octave and it sounds like 'He'.

They saygo hoot, hoot, hoot, like owls, but in a higher tone, then once in the phrase it becomes about one octave higher and they say likego 'He'. They go hoot, hoot, hoot, like owls, but in a higher tone, then once in the phrase it becomes about one octave higher and they go 'He'.

Using "go" as an alternative for said to avoid using "say" for animals. If you want to personify them more, though, said is probably fine.

They saygo hoot, hoot, hoot, like owls, but in a higher tone, then once in the phrase it becomes about one octave higher and they sayit sounds like 'He'. They go hoot, hoot, hoot like owls, but in a higher tone, then once in the phrase it becomes about one octave higher and it sounds like 'He'.

They say hoot, hoot, hoot, like owls, but in a higher tone, then once in the phrase it becomes about one octave higher andlike they say likeound 'Hhe'. They say hoot, hoot, hoot, like owls, but in a higher tone, then once in the phrase it becomes about one octave higher like the sound 'he'.

IDEA: It might be good to write the IPA pronunciation since the word "he" can be pronounced several different ways.

They saying hoot, hoot, hoot, like owls, but in a higher tone, then once in the phrase it becomes about one octave higher and they saying it like 'He'. They sing hoot, hoot, hoot, like owls, but in a higher tone, then once in the phrase it becomes about one octave higher and they sing it like 'He'.

I don't know who or what they were mourning about, but they have non't visited me for quite some time since. I don't know who or what they were mourning, but they haven't visited me for quite some time since.

They were slim middle-sized birds, very modest in appearance, slim middle-sized birds. They were slim middle-sized birds, very modest in appearance.

They were very modest in appearance, slim middleedium-sized birds. They were very modest in appearance, slim medium-sized birds.

Once, when I stepped out onto the small balcony in the middle of the apartment building, I hadgot a chance to see them at a very shortclose distance. Once, when I stepped out onto the small balcony in the middle of the apartment building, I got a chance to see them at close distance.

Once when I stepped out onto the small balcony in the middle of the apartment building, I had a chance to see them at a very short distancup close. Once when I stepped out onto the small balcony in the middle of the apartment building, I had a chance to see them up close.

Once when I stepped out onto the small balcony in the middle of themy apartment building, I had a chance to see them atfrom a very short distance. Once when I stepped out onto the small balcony in the middle of my apartment building, I had a chance to see them from a very short distance.

They were sitting on the *fence there showing their backs to me, and I saw; I got to see their long tails. They were sitting on the *fence showing their backs to me; I got to see their long tails.

*railing

They were sitting on the fence withere showing their backs tourned toward me, and I saw their long tails. They were sitting on the fence with their backs turned toward me, and I saw their long tails.

They were sitting (or perched) on the fence there showing their backs to me, and I saw their long tails. They were sitting (or perched) on the fence there showing their backs to me, and I saw their long tails.

"Perhced" is commonly used to describe stationary birds, but "sat" is also fine. "Sit perched" is also used!

They were sitting on thea fence there show, displaying their backs to me, and I saw their long tails. They were sitting on a fence there, displaying their backs to me, and I saw their long tails.

Several seconds passed before they flew away saying/singing/with a kakakakakaka.... Several seconds passed before they flew away saying/singing/with a kakakakakaka....

[Verb] with a [onomatopoeia] is somewhat common expression. Like "going out with a bang."

Several seconds passed before they flew away, saying something like "ka-ka-ka-ka-ka-ka...." Several seconds passed before they flew away, saying something like "ka-ka-ka-ka-ka-ka...."

NOTE: The expression "something like" is a good animal noises.

The name of the birds turned out to be 'mourning dove's. The birds turned out to be mourning doves.

The name of the birdsSMOOTHER: They turned out to be 'mourning dove's. SMOOTHER: They turned out to be mourning doves.

NOTE: You can delete the quotation markers from this sentence.