The verdict was handed down at the Ångermanland district court in northern Sweden where the 47-year-old was found guilty of hunting and aggravated species protection offences.
During one sweep of the man's home an estimated 2000 eggs were found in a secret room.
Police revealed that up to 15,000 eggs were seized in different places across the country. A total of three men appeared in court in connection with the egg thefts, with the prosecution arguing for a two year sentence for the 47-year-old who was considered the ringleader.
Following the 23-day trial the man was sentenced to a year behind bars, while the two other defendants were hit with probation charges.
The 47-year-old did not appear in court due to ill health but his lawyer said he understood that he will be convicted after entering a probation plea.
Police have been working on cracking the case since 2010 which has involved eggs from kestrels, red throated divers and red backed shrikes being plundered from nests.
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The case also involved the British police after a raid in Scotland revealed that a person, who was selling rare bird's eggs, had some email correspondence with one of the defendants.
Prosecutor Stig Andersson told local newspaper Allehanda.se; "We have not been able to show that they earned money by selling or supplying eggs," he said.