rule 34 11 abstract background ambiguous gender ambiguous penetrated avian beak bird black beak black body black feathers blurred foreground bodily fluids brown eyes corvid corvus genus cum cum drip dripping duo einin feathers feral genital fluids genitals grey body grey feathers hi res male maleambiguous oscine passerine penetration penis pink beak pink penis raven bird sex signature talons tapering penis white body white feathers 6032057