Petersburg Animation Studio

Background
Petersburg Animation Studio is a Saint Petersburg-based Russian studio founded in March 2003 by Ilya Popov and Anatoly Prokhorov. The studio is mostly famous for their Kikoriki animated series which eventually became successful and spanned a cult following.

1st Logo (May 17, 2004-December 22, 2013)
Visuals: On a white rectangle, we see a square which contains a white spiral P. Next to the spiral P is "СТУДИЯ КОМПЬЮТЕРНОЙ АНИМАЦИИ (the last two words are stacked)" (2004-2008)/"СТУДИЯ АНИМАЦИИ" (2008-2013). "ПЕТЕРБУРГ" is seen below the text.

Variants:
 * In the original 2004-2012 run of Kikoriki, the logo was placed under the Kikoriki emblem of the time which consisted of a simple daisy wheel on a blue rounded square. The emblem was also used as a screen bug on original prints of episodes up until episode 110 (The Right To Be Lonely), which is the first episode to not include the emblem as an on-screen bug.
 * Original prints of earlier episodes of Kikoriki up until episode 40 (A Story for Rosa) had the logo placed over the credits' background. Episodes starting with episode 41 (Little Big Sea) and post-2008 widescreen DVD prints use the regular black background instead.
 * However, weirdly enough, early TV prints of episode 59 (The Chill) also had the logos placed over the background.
 * On some episodes, a credit for Classica-Film (a company that was once responsible for the digital-to-film movie transferring) is seen.

Technique: None.

Audio: The closing theme of the episode.

Availability: Seen on Kikoriki, Kikoriki: New Adventures and the first two seasons of Kikoriki: Pin-Code.

2nd Logo (December 22, 2011, October 20, 2017)
Visuals: On a black background, the spiral P from the previous logo is being formed. A square appears behind it, and the spiral P moves away to reveal the "СТУДИЯ АНИМАЦИИ" and "ПЕТЕРБУРГ" from the previous logo.

Variant: An English variant exists.

Technique: The spiral P forming and zooming out.

Audio: The opening theme to the movie.

Availability: Only seen on Kikoriki: Team Invincible. The English variant is seen on Shout! Factory prints of the aforementioned movie.

3rd Logo (January 25, 2015-)
Visuals: Unknown.

Technique: Unknown.

Audio: Unknown.

Availability: It initially debuted as an in-credit logo on episodes of Kikoriki: Pin-Code, and it was later seen on the studio's current projects like the Kikoriki: Legend of the Golden Dragon movie.