spatial x,y components cover 99.6% deviance

[leandrom84]

dear Noam,
im dealing with data of nest sites (nido=0/1) and wanted to explore the spatial component. When running the spatial GAM i got the result that Rsq is 1.
Im not sure if im running something. At the momment my response variable (nido=0/1) is set as factor to able to use the binomail-logit function.
any toughts?
thanks so much, your post/site is amazing!!

mod4

Family: binomial
Link function: logit

Formula:
nido ~ te(x, y)

Estimated degrees of freedom:
7.63 total = 8.63

UBRE score: -0.3558566

summary(mod4)

Family: binomial
Link function: logit

Formula:
nido ~ te(x, y)

Parametric coefficients:
Estimate Std. Error z value Pr(>|z|)
(Intercept) 26.03 97.69 0.266 0.79

Approximate significance of smooth terms:
edf Ref.df Chi.sq p-value
te(x,y) 7.626 7.94 0.267 1

R-sq.(adj) = 1 Deviance explained = 99.6%
UBRE = -0.35586 Scale est. = 1 n = 27