The species calls throughout the year while hidden in thick foliage, typically at dawn.

Although the call is generally helpful when identifying pipits, this species calls far less than most.

Invasive species, the professionals call them, and a rich field of study they offer.

Some species call while they are under water and the sound travels through the water.

Instead, we found a species of powerful recluses called the Caeliar, who took us prisoner.

For other species also called blue tetra, see here.

An alien species called the Borg is intent on invading this region of the galaxy.

In all, 55 species of mosquitoes call Houston home, and even under normal conditions man often wages a losing battle against them.

Although cuckoos are diurnal, many species call at night.

In most species both sexes call; some have different calls for males and females.