You can't upgrade your original 7 queen workers. In real life, the first few nanny workers are fed with the queen's own muscle tissue, which aren't really nutritious, and die soon after stronger workers are ready to work.
In mission 2.1, you start with 3 black ant workers and a dead black ant queen nest to you. In real life, a wood ant queen will secretly infiltrate and kill the black ant queen, trick the black ant worker to work for her until her own children are born.
The leafcutter majors, once implemented into the ereptor colony, hunts insects and harvests seeds, unlike in campaign mode where they only feed on leaves. That's because they aren't actually leafcutters at all: they are ereptor workers with leafcutter DNA, and while they have the appearance and abilities of leafcutter ants, they still feed and behave just like their other castes.
The limits on neighboring tiles when upgrading food and nursery tiles isn't just arbitrary, it's to encourage the player to build tunnels and chambers, just as ants would realistically do.
Fridge Horror
What exactly are the ereptor ants, and why are the scientists so keen on studying them? Especially the male scientist whose malicious tone of voice borders almost into supervillain mastermind territory...
The fact that the ereptors can steal DNA from other species and incorporate them into their own is scary. Could you imagine the ecological damage they would cause should they escape into the wild?
