It isn’t just lichen that is threatened in Lithuania these days. Here are some links to other critters also having a hard time of it..
Alien Species on Lithuanian Fund for Nature
http://www.glis.lt/?pid=126
The Noble Beasts of Lithuania
https://www.draugas.org/news/the-noble-beasts-of-lithuania/
Cute european mink now extinct in Lithuania
http://www.iucnredlist.org/details/14018/0
European eel
http://www.iucnredlist.org/details/60344/0
Bats which have some situation in lihtuania (according to red list wiki entry)
https://en.wikipedia.org/wiki/Barbastelle
https://en.wikipedia.org/wiki/Pond_bat
IUCN Red List
https://en.wikipedia.org/wiki/IUCN_Red_List
http://www.iucnredlist.org/search (but difficult to use)
List of mammals in Lithuania (including extinct and endangered ones, ie. certain whales, porpoise etc.)
https://en.wikipedia.org/wiki/List_of_mammals_of_Lithuania
Sea holly, a spiky dune plant, aphrodisiac (in UK), supposedly on the Red List here, Eryngium maritimum
http://samogitia.mch.mii.lt/LANKYTINOS_VIETOS/nerija.en.htm
https://en.wikipedia.org/wiki/Eryngium_maritimum
“Let the sky rain potatoes;
let it thunder to the tune of Green-sleeves,
hail kissing-comfits and snow eringoes [sea-holly],
let there come a tempest of provocation…” (from a Shakespeare play, can’t remember which)
Very detailed study, well nomination for UNESCO list, including some discussion of rare species (fish, mammals, plants, and birds) here (1999 – super out-of-date. Eg. they refer to something as rare but on IUCN its status is a-ok)
http://www.unesco.lt/uploads/file/failai_VEIKLA/kultura/Pasaulio_paveldas%20Lietuvoje/nerija_dok/curonian_spit_nomination_EN.pdf