Aussie magpies aren't known as 'butcher' birds for nothing.
Either that or he's working off a debt he owes to a squirrel.
They are known for hiding food when it's plentiful. They are also well known for forgetting where they hide their stashes. so I guess you'll get a few sunflowers next year (on the proviso, there hasn't been a deal struck with a local squirrel)
not symbiotic and not even sympatric (being of different species). However, where Beer, crack and peanuts are present they tend to operate on mutualism.
Symbiotic is perfectly permissible term for a mutually beneficial relationship between different species (e.g. tube worms and trophosomic bacteria that feed off of sulphur from hydothermal vents).Sympatric refers to organisms whose geographical boundaries overlap. Its often used when describing the process of speciation and species diverging whilst still overlaping in geographical boundaries often involves differences in behaviour (the opposite of sympatric speciation being allopatric speciation when a species is split geographically, by perhaps the occurence of a new mountain range, continental drift or a new river and the species diverge under differing selection pressures).[sic]