I also tried several pigeons. I have no excuse, since I live 30 minutes from the Cincinnati zoo. "Passenger" is a weird name anyway. I don't think anybody was riding them.
Irish servants of the 18th century sometimes negotiated contracts that provided that they would not be served salmon more than three times a week. https://www.epicurious.com/recipes/food/views/seared-salmon-with-raisin-and-caper-butter-237877
Great quiz, thank you. One request: Coast Salish folks are alive and well, and this fish is still important to many, though perhaps not all 30,000+ of them. Speaking about them in the past tense is odd, and incidentally emphasizes the mistaken notion that Indigenous peoples are gone. Allow me to suggest a rewording of the clue to "Fish that form a large part of the traditional diet of the Coast Salish people of the Puget Sound." Then everyone is happy as a clam :)
NASA had thought about sending several calves into space rather than a chimpanzee, but decided against it. That would have been the herd shot round the world.
this is a good quiz but similar to other comments I have to object to the consistency of accepting certain answers. You get credit just for condor not california condor, you get credit for shrimp not needing brine shrimp, get credit for eagle not needing bald eagle, and real stretch is I got credit just for bear instead of california grizzly or grizzly bear! So even though I understand a carrier pigeon is a homing pigeon not a passenger pigeon I still think to be consistent pigeon should be accepted. or make all the ones I mentioned the tougher acceptance. And clearly many jet punkers have issues with pigeon as it is lowest clue at 28%.