When I lived in Louisiana, my property backed up against a sugar cane field. Mice would frolic in the sugar cane all summer long until one day in the autumn the farmers would harvest the cane and instantaneously the 8-10' canopy the mice enjoyed was reduces to stubble. Three things rapidly ensued as sure as the sun rises in the east:
1. Raptors would fill the air patrolling the cane field for easy pickings from the rodent buffet.
2. Mice robbed of their cover and concealment would make a bee line for them nearest buildings trying to evade the hawks and falcons.
3. Snakes would follow their food into the houses.
Only once saw a venomous snake (pygmy rattler) in my house, but no shortage of king and rat snakes, probably 1-2 x year on average. Having a doggy door probably didn't help.
I've seen a baby albino rattler once (very passive), but never had a chance to see a pygmy.
Unfortunately, no snakes here on Oahu.. not sure about the other islands.
This place has had a rat issue for a LONG time. From what I've been told, sometime around the 1920s (correction from reading just now, 1883), someone had the bright idea of bringing in
mongooses to take care of the rat problem.
..
Rats are NOCTURNAL & mongooses (mongeese?!) are NOT nocturnal (DuH!).. so they just made more environmental problems.
(At least they keep the insane feral cat population down.)