Heron problem: train a crow!
A homeowner has been paying a crow in mealworms for chasing a hungry heron out of his garden after it stole hundreds of pounds worth of fish from his pond. 
Simon McCabe, 51, says the heron has 'emptied' the pond in his back garden of koi carp and goldfish.
But ever since the crow started visiting the garden last month, the little bird has 'looked after' his pond community and he's not lost a fish since.  
https://www.dailymail.co.uk/news/article-7037217/Homeowner-pays-crow-wor...