Flickerbat

Flickerbats are flying creatures pale blue in color, though optical camouflaging render them invisible to the naked eye most of the time. They have fairly small wings, requiring them to flap their wings at a rapid rate to fly. Scientists have only been able to track them reliably by the use of X-ray imaging. They fly non-stop without tiring, hunting for insects and other small prey that float on air currents. Flickerbats generally fly in cyclical hunting patterns, using primitive sonar to navigate.

Samus Aran encounters Flickerbats in Phendrana Drifts on Tallon IV. It is hard to spot them without the use of the X-Ray Visor due to their optical camouflaging. They pose no threat to her unless she is in the way of their hunting patterns.