user: After pairing up and nesting in May, the birds become defensive and are on the lookout for even more food than usual.
But local authorities have no legal power to deal with them.
The RSPB said even though more and more are being seen, they are actually protected because of their reducing numbers.
Margaret Parry from Moelfre on Anglesey, was attacked by a seagull which felt its chick had been threatened.
"She cut me on my face, couple of inches cut, hospital job," she said.
Ms Parry told BBC Radio Cymru's Manylu programme that her wound had to be glued, she needed a tetanus injection and experienced headaches for three days.
Contractor Geraint Williams, from Caernarfon, uses a distress alarm to attract seagulls and then releases a bird of prey which is trained to scare them away from the area.
It is a method designed to get rid of the birds from company buildings without killing them.
"They are very inquisitive birds and if they hear one of their own in distress, they will come to investigate," he said.

Sum: June is the time of year when people are most likely to be attacked by seagulls.


Police seized printing plates and thousands of editions overnight on Friday. Cable television is also reported to have been shut down.
More than 40 people have died in recent clashes in the area.
The crisis was sparked by the killing of a prominent separatist militant, Burhan Wani.
More than 1,500 others have also been injured in fighting between protesters and the security forces.
A curfew remains in place - along with curbs on mobile and internet access.
"The clamp-down was necessitated as Pakistani channels that are beamed here through cable television network have launched a campaign aimed at fomenting trouble here," an unnamed Jammu and Kashmir government minister told the Reuters news agency.
"Some newspapers were also sensationalising the violence... We will take a decision on [their] restoration after 19 July."
The Greater Kashmir, Rising Kashmir and the Kashmir Observer, are among the titles who said they were affected.
Abdul Rashid Mukhdoomi, printer and publisher of the Greater Kashmir, said that there were no orders "under which the printing and circulation of our newspapers were stopped".

Sum: Several leading newspapers in Indian-administered Kashmir say they have been have been raided by police seeking to end a week of violent protests.


Pay-monthly customers can get one share - now worth $43.07 - with the chance of more for referring new customers.
"This has never been done before," by a public company, claimed chief executive John Legere.
T-Mobile, the third biggest US network after Verizon and AT&T, has a reputation for innovative promotions.
It styles itself as the "uncarrier", offering customers free video-streaming options, gifts, tie-ups with ticket agency StubHub, and customer-friendly data plans that have been copied by rivals.
The oversaturated US mobile market has sparked a price war with providers fighting for market share.
T-Mobile customers qualifying for a free share will be able to earn up to 100 more if they refer new subscribers.
The company said in a statement that some long-term customers will qualifying for two extra shares per referral.
Mr Legere, known for his boisterous presentations and love of social media, said: "Get ready for a gratitude adjustment, America. This Un-carrier move is all about giving you a good thanking! No strings. No gotchas. Just 'thank you for being a customer'".
T-Mobile US chief marketing officer Andrew Sherrard told the Reuters news agency: "Some [free offers] will cost us some money but over time we think it will be a really good investment."
The company, controlled by Deutsche Telekom, said it added 2.2 million customers on a net basis in the first quarter ending 31 March.

Sum: T-Mobile US is to offer about 10 million of its customers free shares as the fast-growing company attempts to take on its larger rivals.


Miles Storey broke the deadlock when he escaped the offside trap and rounded Scott Bain before netting.
Danny Devine tapped home at the back post from a corner before Ross Draper capitalised on Julen Etxabeguren's error to fire home.
Richie Foran added a late penalty after Liam Polworth was tripped.
Dundee knew before kick-off that they needed a win to leapfrog their hosts and finish top of the bottom half of the table.
Both sides named unchanged line-ups, with Danny Williams making his last appearance for the home side before joining Dundee this summer, alongside team-mate James Vincent.
Dundee's Paul McGinn is out of contract this summer and looks likely to depart with a number of sides apparently keen on recruiting him.
If possession won football matches the home side would have been out of sight in the opening quarter.
Iain Vigurs wasted a great chance with a tame free-kick from the edge of the box and two long-range Greg Tansey strikes landed safely in Bain's arms.
Dundee initially struggled to get on the ball but came closest to an opener on the counter when Greg Stewart combined with Kane Hemmings before curling a great effort from outside the box which unluckily clipped the bar.
Rory Loy fired wide, Hemmings fired over with a clear sight of goal and McGinn watched Owain Fon Williams parry his effort clear as the visitors threatened.
But Inverness again took control in the second period with Williams seeing a close-range shot blocked, while another long range effort from Tansey was held easily.
The match needed a moment of inspiration. It arrived when Storey timed his run well to go clear. Despite being forced wide by goalkeeper Bain, the striker found the angle to net his 13th of the season.
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It all fell apart for Dundee. Devine tapped home at the back-post after a corner was flicked on before Etxabeguren inexplicably lost possession on the edge of his own area and Draper fired past the exposed Bain.
It got worse after the home side introduced two popular substitutes. The departing David Raven had a rare outing and Foran came on and scored a convincing penalty after Polworth was tripped by Adam Black.
Dundee were denied a late consolation when Craig Wighton's poke toward goal was superbly saved by Fon Williams.
This was a fifth win in seven games for John Hughes' side, who might wish this was the start of the campaign rather than the end. It was a horrible end for Dundee, who are a better side than this defeat suggests.

Sum:

assistant: Three goals in nine second-half minutes helped Inverness CT to an emphatic win that ensures a seventh-place Premiership finish.