Fisher from Outside

"Men have disappeared. You're aware of that, aren't you? Men have disappeared within sight of their homes — at high noon, in the sunlight. Malignant and unknowable entities, fishers from outside have let down invisible tentacles, nets, trawl and men and women have been caught up in a kind of pulsing darkness. A shadow seems to pass over them, to envelop them for an instant and then they are gone."

- Roger Little

The Fishers from Outside are a mysterious species which lived in prehistoric times and built outposts on several planets. They seem to have worshiped deities known as Tsadogwa and Clulu, although they're also known to be servants of the avian god Groth-golka.

On Earth, ruins of their civilization have been found in central and southern Africa. The locals believe such places to be haunted and connected in some unknown way to the "devil-flies" (a.k.a. the tsetse flies, Glossina palpalis).

According to occultist Roger Little, the Fishers from Outside have been responsible for several abductions of Humans in broad daylight, by extending invisible nets or tentacles.

Biology
The Fishers from Outside are vaguely avian creatures covered in scales rather than feathers, with a single leg, a single eye and a hook-shaped beak with fangs.

Appearances

 * "The Outpost", by H. P. Lovecraft (1929)
 * The Horror from the Hills, by Frank Belknap Long (1931)
 * "Winged Death", by H. P. Lovecraft and Hazel Heald (1934)
 * "The Fishers from Outside", by Lin Carter (1988)