Good point. But parent comment described infanticide by finches as a response to captivity, as if they were deliberately preventing offspring from growing up in captivity. In contrast, the "motives" given in the Wiki article are either 1. sexual conflict (e.g. offspring of a rival male), or 2. resource scarcity.

The CNN article seems more similar, even as the zoo is very careful not to say the behavior is caused by captivity.