boyeria irene western specter exuvia or cuticle that remains after the adult insect emerges in the twigs near the rivers or

abandoned andalusia animal aquatic biotope blank case casing chitin closeup cocoon cuticle development dragonfly duck entomology european exuvia fauna freshly gleaming grub huelva insect invertebrate lake large larvae leftover living macro metamorphosis nature odonata outdoor photography pond reed river shed shirt skin space spain spare stone structure transparent view wildlife