The best replacement for bats is birds.

The best alternatives to bats are rated as following:
★★★★★  birds
★★  aluminum bats
★★  wooden bats
★  swallows
★  flying foxes
★  aluminum
★  reds
★  wood bats
★  chimney swifts
★  mice
★  metal bats
★  owls
★  nyse
★  plate appearances
★  flying squirrels
★  iex
  spiders
  wood
  ash bats
  besr
  crows
  swifts
  balanced bats
  composite
  bbcor
  maple bats
  chimney sweeps
  composite bats
  supes
  maple
  metal
  blown
  alloy bats
  purple martins
  small barrel bats
  poseidon
  alloy

Your alternative for bats is not listed? Suggest!
Speaking about bats, one probably shouldn't forget about rabies.

Other search terms related to bats and their ratings are:
★★★★★ rabies
★★★ white nose syndrome
★★ echolocation
★ bbcor
You have in mind a companion for bats and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of bats in all years. Click on graph for more.
bats
birds
aluminum bats