Noah's Ark Possibility Project (NAPP)
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Table H - Sources

h40 https://en.wikipedia.org/wiki/List_of_recently_extinct_bird_species
Checked each unquestionable genera in the above with wikipedia articles to find out if it was extinct and whether the bird was flightless.

The following references indicated the bird was flightless.

h41 https://en.wikipedia.org/wiki/Elephant_bird
h46 https://en.wikipedia.org/wiki/Great_auk
h47 https://en.wikipedia.org/wiki/Saint_Helena_dove
https://en.wikipedia.org/wiki/Dodo
https://en.wikipedia.org/wiki/Rodrigues_solitaire
h50 https://en.wikipedia.org/wiki/Elephant_bird
h53 https://en.wikipedia.org/wiki/Rodrigues_rail
https://en.wikipedia.org/wiki/Chatham_rail
https://en.wikipedia.org/wiki/Saint_Helena_rail
https://en.wikipedia.org/wiki/Ascension_crake
https://en.wikipedia.org/wiki/Hawkins%27s_rail

h70Table 14, Page 149, compared all on list, except those possibly extinct, against their Wikipedia articles to determine extinct genera. Extinct genera were then reviewed for whether they could reasonably be off the deck.

h80 https://en.wikipedia.org/wiki/List_of_recently_extinct_mammal 6/8/19, compared the Ruminantia against their Wikipedia articles for extinct genera