Beware – it is magpie nesting season and the “infamous swoopers” are regarded as so clever, they will bear in mind faces.
South Australia’s Division for Setting and Water ecologist Karl Hillyard mentioned individuals who had been swooped earlier than had been more likely to be swooped once more with magpies usually returning to the identical space to breed yearly.
Whereas Macquarie College behavioural ecologist Ben Ashton mentioned the behaviour may even seem notably deliberate.
“Magpies are essentially the most infamous swoopers and should persistently goal a selected particular person, whereas ignoring others,” he mentioned.
Swooping magpies defending their nests are a spring hazard in Canberra. Supply: AAP / Alan Porritt
However each ecologists agree the assaults usually are not malicious, with the birds actively searching for to guard their nests or their younger.
“And it is not simply people that get swooped by magpies,” Ashton mentioned.
“Different hen species, resembling ravens, and different animals resembling canines, get swooped as nicely.”
A wedge-tailed eagle comes beneath assault from a local Australian Magpie. Supply: AAP / Dean Lewins
When is swooping season and why do magpies assault?
Normally, swooping occurs when a passing human or animal is taken into account a risk to a younger magpie or magpie egg.
That is the time when magpies are most weak which explains why swooping has been recommended to be an anti-predator adaptation.
Breeding season for maggies runs from about August to October.
Females often lay between three and 5 eggs earlier than sitting on them for about three weeks till they hatch.
“Throughout this time, male magpies take up the function of the protector, with some utilizing swooping as a tactic to defend their nests,” Hillyard mentioned.
“They are going to do that from the time the eggs are laid till the younger birds are able to fly, which is generally about 4 to 5 weeks after hatching.”
Find out how to keep away from a magpie assault?
Altering your route is taken into account one of the simplest ways to keep away from being swooped, with magpies solely more likely to defend an space inside 100 metres of their nests.
However there are different ways.
The specialists recommend strolling reasonably than working away, carrying sun shades on the again of your head or a hat with a pair of eyes drawn on the again.
Much less refined will be carrying a motorbike or skateboard helmet or carrying an open umbrella.
Hillyard mentioned it was necessary to not act aggressively.
“When you wave your arms or shout, the birds will see you as a risk to the nest, not simply this yr however doubtlessly for years to come back,” he mentioned.
And whereas it may appear we’re all beneath assault, in actuality, Ashton mentioned solely about 10 per cent of magpies swoop.
In his 10 years of researching the birds, he is by no means been focused.
How clever are magpies?
In his work, Ashton is utilizing magpies as a research species to reply questions central to the understanding of cognitive evolution.
“One of many essential hypotheses for the evolution of intelligence predicts that the challenges of dwelling in advanced social environments selects for higher intelligence,” he mentioned.
“According to this, my colleagues and I discovered a relationship between group dimension and cognitive efficiency in magpies.
“We discovered that magpies dwelling in bigger teams carried out higher in a collection of cognitive duties.”
Macquarie College behavioural ecologist Ben Ashton is finding out magpie behaviour. Credit score: Provided
They’re now finishing up a collection of extra experiments to find out what’s driving that relationship.
“For instance, we’re utilizing social community evaluation to see if it’s the quantity and power of social relationships that drive cognitive growth,” Ashton mentioned.
“We’re additionally researching cognitive senescence, the gradual decline in cognition with age.”
Cognitive senescence is nicely documented in people, however largely unknown in wild animals.
