in the absence of a trunk or stone to lean on, a capybara may be an option;
I have observed these two individuals do this twice;
see also
https://www.inaturalist.org/journal/nelson_wisnik/21258-the-friendly-capybara
近似种小红脊角蝉Machaerotypus rubromarginatus体型小于6mm,而这种大于6.5mm;
另外苹果红脊角蝉Machaerotypus mali 肩部的红色粗很多
网上有很多误定 比如下面这个(仍然是延安红脊角蝉)
http://www.papc.cn/html/album/13114636-1.htm#p=1
参考资料:
周尧,袁锋.脊角蝉属的讨论及其中国种记述[J].昆虫分类学报,1981(02):103-110.
https://kns.cnki.net/KCMS/detail/detail.aspx?dbcode=CJFD&filename=KCFL198102005&dbname=CJFD7984