indicator species

So, why would a species like the banded mongoose favor breeding between relatives?
Mongooses, Meerkats, and Ants, Oh My! Why Some Animals Keep Mating All in the Family|Helen Thompson|December 29, 2014|DAILY BEAST
In Greek mythology, the species became associated with numerous gods.
The History of the Chicken: How This Humble Bird Saved Humanity|William O’Connor|December 27, 2014|DAILY BEAST
Mistletoes infections can kill individual trees and stands of trees, and most mistletoe species attack specific tree species.
Mistletoe is the Vampire of Plants|Helen Thompson|December 21, 2014|DAILY BEAST
Instead, most of the suffering species ate insects on the forest floor.
Mistletoe is the Vampire of Plants|Helen Thompson|December 21, 2014|DAILY BEAST

Mistletoes on mesquite trees in central Mexico have been linked to a greater abundance of tropical bird species.
Mistletoe is the Vampire of Plants|Helen Thompson|December 21, 2014|DAILY BEAST
Fourteen genera, representing about 19 species, of Mallophaga are reported for 20 different species of bird hosts.
Summer Birds From the Yucatan Peninsula|Erwin E. Klaas
This is a feature by means of which it is always possible to distinguish the Great Horsetail from any other species.
How to Know the Ferns|S. Leonard Bastin
Most of my observations are in keeping with Skutch's detailed report of the species in Central America.
Summer Birds From the Yucatan Peninsula|Erwin E. Klaas
Where the outside conditions are not very favourable, practically all the British species may be grown with ease under glass.
How to Know the Ferns|S. Leonard Bastin
Whatever the species, it is well to imitate the natural conditions as much as possible in the way of soil.
How to Know the Ferns|S. Leonard Bastin

Scientific definitions for indicator species

indicator species

A species whose presence, absence, or relative well-being in a given environment is a sign of the overall health of its ecosystem. By monitoring the condition and behavior of an indicator species, scientists can determine how changes in the environment are likely to affect other species that are more difficult to study. Compare keystone species.