Wow, way to not link to a study, but rather a Smithsonian blog talking about a Wordpress blog talking about a study. You clearly love your primary sources!
FYI, the study is just one of many. The study itself cites others, including:
20,000 birds/yr (Sovacool, 2012)
10,000–40,000 birds/yr (Erickson et al., 2001 and Manville, 2005)
20,000–40,000 birds/yr (Erickson et al., 2005)
440,000 (Manville, 2009)
573,000 (Smallwood, 2013).
The latter two include lattice towers, which are largely being decommissioned as unsafe to birds.
But hey, having varied numbers clearly means that if you can find a blog linking to another blog linking to a study that shows high numbers (among many different studies), then clearly the GP is "plain wrong", right?
And yes, even if we go with your choice study's mean of 234,012 annual bird deaths, that's still orders of magnitude less than many other types of human activities.