Lizards in bedrooms!

Unhappily,several times a week we find various animals in our flat! So far we've found moths,a cockroach,a butterfly,various beetles,mosquitoes,spiders,singers (bugs) including one on my bed+a lizard in my bedroom!! As well as this there's been 2 instances where birds have flown inside (once in the Common Room+once in the kitchen!) +3 snakes have been found on COTT's property,including an Adder!!