# Are these glm models nested?

I am not able to tell if these two glm models are nested within one another. This is from the "mack" dataset in the R library "gamair".

    fit3 <- glm(egg.count ~ b.depth + s.depth + temp.20m +
lat + lon + flow + temp.surf + factor(country),

I said that these two models were not nested because net.area is in one model and not in the other and the same for country. Hence there is no larger model. But I'm still not sure if this correct reasoning.