The "'black-throated gray warbler "'( " Setophaga nigrescens " ) is a passerine bird of the New World warbler family Parulidae.
12.
The "'sooty thrush "'( " Turdus nigrescens " ) is a large thrush endemic to the highlands of Costa Rica and western Panama.
13.
The 6, 255 acre ( 25 km 2 ) refuge was established in 1971 to protect the now extinct dusky seaside sparrow, " Ammodramus maritimus nigrescens ".
14.
Several types of trees grow along the spring line, including " Comebretum imberbe, Sclerocarya caffra, Lonchocarpus capassa, Acacia sierberiana, " and " Acacia nigrescens ."
15.
However the subspecies " T . f . nigrescens " from the north-eastren United States may be a melanistic morph of the nominate subspecies rather than a valid taxon in its own right.
16.
Especially elegant is lilyturf ( Liriope ) Silver Sunproof, which is striped silver and green, and its cousin, the dusky maroon mondo grass ( Ophiopogon planiscapus Nigrescens ) usually sold under the name Ebony Knight.
17.
The "'Knobthorn "'( " Senegalia nigrescens " ) is a deciduous African tree, growing up to 18 m tall, that is found in savanna regions from West Africa to South Africa.
18.
They found " P . caledonicus " to be basal to the other blue-cheeked forms, with " P . elegans nigrescens " being divergent from other subspecies of " P . elegans ".
19.
Edmondston the botanist compiled the first known list of Shetland plants at the age of 11 and which he showed to the visiting Sir endemic Shetland Mouse-ear " Cerastium nigrescens ", known as Edmondston's Chickweed on the island.
20.
Threatened reptiles such as the Python molurus, Indian star tortoise, and venomous snakes such as Indian cobra, Russell's viper, Common krait and the endemic Bamboo pit viper and the little-known striped coral snake Calliophis nigrescens are found here.
