Eucorrhinia pectoralis Charpentier, 1825 (Dragonfly two-color or marsh, Belonos marsh)
Lower lip entirely black. the 7th belly ring with very big, reaching the rear edge of a ring, a spot of bright lemon color. A breast between the bases of wings yellow. The Kostalny vein to a small knot whitish, a small knot in the top half black. The basis of back wings with a dark opaque reddish stain. Zhilkovaniye of wings dark. Pterostigma black or brown.
♂: A paunch without blue raid. A spot from above on the 7th tergit of a paunch large, light-or citreous, contrasting with red spots on other tergita of a paunch. Pterostigma is black.
♀: A spot from above on the 7th tergit of a paunch large, light-or citreous, contrasting with dark yellow spots on other tergita of a paunch.
Years: the middle of May - the end of July.
Length of 32-39 mm, paunch of 24-27 mm, back wing of 30-33 mm.
Meets in forest landscapes more often. Breeds in the most various standing or slowly current reservoirs. Prefers the dense, semi-shipped and floating water vegetation.