File Facehugger
The Facehugger greatly resembles a pair of skeletal hands fused together, with a spine-like tail. It has eight long, finger-like legs which allow it to crawl rapidly, and a long tail adapted for making great leaps. These particular appendages give it an appearance somewhat comparable to Chelicerate arthropods such as arachnids and horseshoe crabs. The underside of the Facehugger and its orifice (from which extends a proboscis used for delivering the Xenomorph embryo) noticeably resemble a human female's vagina.A Facehugger's long digits allow it to move rapidly across all manner of surfaces and also grant the creature its crucial ability to grip a host's head during implantation. The spindly appearance of these digits should not be underestimated; they are incredibly strong, and have been known to tear the skin from the skulls of human victims when an attempt is made to remove them. Once the digits are gripped around a host's head, they are nigh impossible to remove and implantation is virtually guaranteed. Facehuggers have even been known to use their tail to strangle potential hosts when attempts are made to remove them.
Source : Avp.Fandom