A worker drowned two swallow chicks at a building site at Gleneagles Hotel, Perth Sheriff Court has heard.
The chicks had fallen out of a swallow's nest
The birds, which were about one-week-old, were deliberately thrown into a puddle and killed by Polish labourer Zbigniew Dyrda.
Dyrda, 28, from Glenrothes, admitted carrying out the offence on 19 July last year and was fined £110.
The Crown accepted his not guilty plea to a second charge of deliberately knocking the birds' nest to the ground.
The court head how the chicks fell to the ground after the nest at the timeshare development was disturbed.
Fiscal depute Stuart Richardson said: "Attracting some interest among those employed there was a swallow's nest which had been built.
"It was noticed there were young swallows in the nest. It would appear two of the chicks fell to the ground from the nest.
"The accused then picked them up and threw them into a large puddle of water, obviously killing them. Other workers noticed this and called the police."
Solicitor Billy Somerville, defending, said: "He was working as a labourer with a company in the area. It appears the nest was accidentally dislodged.
"The two birds had fallen out of it and he didn't know what to do. They were possibly only one-week old.
"I don't think they would have survived falling out of the nest in any case, but he does accept disposing of them in the manner described.
"He was totally unaware he had committed an offence. He is currently unemployed having recently returned here from Poland."