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The Serranía de la Macarena is located on the border of three large [[ecosystem]]s, each of them with high diversity of flora and fauna: the [[Andes]], the [[Llanos]], and the [[Amazon rainforest]]. The representative biome of the [[Serrania de la Macarena]] is the hydrophytic rainforest: hot, warm, and cold. The tableland is home to about 420 species of birds, 10 species of amphibians, 43 species of reptiles, and eight primates. Caño Cristales is home to several species of [[fish]] (despite sometimes claimed to contain no fish), freshwater [[turtles]] and other aquatic animals.<ref name=MI2017>{{cite web| last=Mikolji | first=I. | title=Caño Cristales | url=https://www.mikolji.com/cano-cristales/ | website=mikolji.com | access-date=28 May 2023 }}</ref><ref name=AvHumboldt2017>{{cite journal| editor1=Lasso, C.A. | editor2=Morales-Betancourt, M.A. | year=2017 | title=Fauna de Caño Cristales, sierra de La Macarena, Meta, Colombia | url=http://repository.humboldt.org.co/bitstream/handle/20.500.11761/32939/558.pdf | journal=Serie Editorial Fauna Silvestre Neotropical. Instituto de Investigación de Recursos Biológicos Alexander von Humboldt | pages=47-65 }}</ref>
Caño Cristales river has a wide variety of aquatic plants. The water of the river is extremely clear due to the lack of nutrients and small particles. Almost unique is the bright red - pink coloration of the riverbed after the rainy period from the end of June till November. This color is caused by great quantities of plant species ''[[Rhyncholacis]] clavígera'' (often known by its former name, ''Macarenia clavigera''). This plant is only found in found in Caño Cristales and a few others rivers in the region, such as the Caño Siete Machos. These plants, which are green when young, then turn yellowish and finally various shade of red, adhere tightly to rocks in places where the river has faster current.<ref name=AvHumboldt2017/><ref>{{cite web| last=Bonilla Morales | first=M.M. | date=7 August 2021 | title=Caño Cristales: el misterio de una flor que envejece | url=https://www.oscarpabon.com/index.php/2021/08/07/cano-cristales-el-misterio-de-una-flor-que-envejece/ | website=oscarpabon.com | access-date=28 May 2023 }}</ref>
==References==
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