This might be a controversial topic, but it would be interesting to see what other birders think about Ring-Necked Parakeets (=Rose-Ringed Parakeet)
There are some 30,000 throughout the UK, with the vast majority in Surrey, but small populations throughout including an expanding population in S Manchester nudging into N Cheshire. They're charismatic birds - until you consider their ecological threat. They compete successfully for nest holes with total disregard for native hole-nesting species of bird & bat. They belong in the Indian Subcontinent, with 2 ssp across Africa
My view is that this non-native species should be removed from this region while it's still practicable
