A wildlife campaigner says he believes the spikes are to stop birds from messing on cars.
Pigeon spikes on Bristol trees branded 'idiotic
Fury over 'ridiculous' spikes on trees to 'stop birds pooing on
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Anti-bird' spikes on tree A tree has had its branches covered in
Spikes on trees in Oxford to 'stop bird poo
Great Gonerby villagers complain of 'pitter patter' of bird
When The World Went To War Over Bird Poop, Elemental
SONGS OF PLACE AND TIME: Birdsong and the Dawn Chorus in Natural
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