<https://www.pigeontype.info/2018/02/17/kasan-tumbler-pigeons/#article>
<http://schema.org/description>
"The Kazan Tumbler Pigeons- also known by the names: Culbutant de Kazan, Kasaner Tümler, Capitombolante in Kasan, Казанский турман - tumbler pigeons - russian tümmler"
<https://www.pigeontype.info/2018/02/17/kasan-tumbler-pigeons/>