1. I never concede or surrender. But I would agree you're not in great shape in the situation you described in item #1. Try to avoid that situation, obviously.
2. Whether you play additional cards depends on what the cards are worth. It's a simple math equation at that point. Can you lay eggs 6 more times in your final 6 turns? IF so, calculate what that is worth, then calculate whether playing a bird and laying eggs 5 times is worth it. IF you are putting a 4th bird in your grassland, it might end up getting you several extra eggs (dependents on how much food the bird costs, since you could otherwise trade one food for a 4th egg each time). If you put a 4th grassland bird with a brown power that gets you one extra point per grassland activation, it might be worth playing. What you want to avoid is playing birds like the Ruddy Duck in the wetland because "It's a high tier bird". Unless that bird somehow smashes multiple bonus cards / end-round goals, it's a negative-point play in a habitat that should not be used much in the final round.
3. In the base game, star nests are very strong. I think I read that the Burrowing Owl has a high correlation to winning, which surprised me because that bird [is lousy]. (I'm editing myself because I am not sure whether we are allowed to use the "su" word in reference to a bird card.) With limited bonus cads and End-Round goals, star nests are likely to play a major factor in any game. There is no way I am conceding just because my opponent has more star nests than I do. Is life so much of a rush that we are conceding, and therefore reducing our win probability from [Something] to [zero]?
4. Ideally you have 2 forest birds at the halfway point, but I'm not conceding just because I don't.
5. Well, that's a big "unless". Cards without abilities can:
a) advance the habitat
b) give you more bonus cards
c) help existing bonus cards
d) give you the entire card tray (The Brant) or give you 4 worms (The northern Flicker).
e) Give you a lot of points (The Bald Eagle, etc.)
f) Help toward end-round goals.
2. Whether you play additional cards depends on what the cards are worth. It's a simple math equation at that point. Can you lay eggs 6 more times in your final 6 turns? IF so, calculate what that is worth, then calculate whether playing a bird and laying eggs 5 times is worth it. IF you are putting a 4th bird in your grassland, it might end up getting you several extra eggs (dependents on how much food the bird costs, since you could otherwise trade one food for a 4th egg each time). If you put a 4th grassland bird with a brown power that gets you one extra point per grassland activation, it might be worth playing. What you want to avoid is playing birds like the Ruddy Duck in the wetland because "It's a high tier bird". Unless that bird somehow smashes multiple bonus cards / end-round goals, it's a negative-point play in a habitat that should not be used much in the final round.
3. In the base game, star nests are very strong. I think I read that the Burrowing Owl has a high correlation to winning, which surprised me because that bird [is lousy]. (I'm editing myself because I am not sure whether we are allowed to use the "su" word in reference to a bird card.) With limited bonus cads and End-Round goals, star nests are likely to play a major factor in any game. There is no way I am conceding just because my opponent has more star nests than I do. Is life so much of a rush that we are conceding, and therefore reducing our win probability from [Something] to [zero]?
4. Ideally you have 2 forest birds at the halfway point, but I'm not conceding just because I don't.
5. Well, that's a big "unless". Cards without abilities can:
a) advance the habitat
b) give you more bonus cards
c) help existing bonus cards
d) give you the entire card tray (The Brant) or give you 4 worms (The northern Flicker).
e) Give you a lot of points (The Bald Eagle, etc.)
f) Help toward end-round goals.