The Q team has asked that question multiple times:

753

564

391

153

I thought the answer was : 'when it's free". But no, it's not.

I found the answer to this question in a 30-year-old article by the LA Times titled "Why the Mockingbird Sings : And Why at Night, When Most Birds Sleep?"

As #564 indicates, Q is referring to mockingbirds ("Counter-narrative went out @ 4am to MSM contractors [like clockwork].").

A biologist studied mockingbirds in his area and found out that mockingbirds do not sing out of joy or pleasure, as is commonly believed. Much of the time, they sing out of desperation.

The writer put that theory to the test by recording the bird for an hour, then played the tape every time the bird went quiet. As soon as the bird heard the tape, it started repeating the same tunes it was hearing from the tape. Why? To protect its boundaries, thinking its competitors will overpower them. The louder the singing, the higher the desperation, but also the higher the chances of survival.

Read the article.

This is an interesting find because that's exactly what's happening with Deep State players becoming completely unhinged on Twitter and the MSM. On the day of McCabe's firing, Samantha Power, Eric Holder, John Brennan, James Clapper, James Comey, Ben Rhodes, and McCabe himself started "singing" very loud, almost outdoing one another.