Piotr Naskrecki / Mayfly subimago, La Selva Biological Research Station, Heredia, Costa Rica

Adrian Davies / Mayfly (Ephemera danica). Cast case of subimago, or dun. Surrey, England, May.

Adrian Davies / Mayfly (Ephemera danica). Cast case of subimago, or dun. Surrey, England, May.

Nature Production / Mayfly (Isonychia japonica) subimago, Japan

Andy Sands / Green drake mayfly (Ephemera danica) on leaf, Subimago, Hertfordshire, England, UK

Piotr Naskrecki / Mayfly (Ephemera mooiana) recently emerged from subimago, Gorongosa National Park, Mozambique

MYN / Lily Kumpe / Christmas Spider (Austracantha minax) Denmark Shire, Warren Bioregion, Western Australia. Meetyourneighbtous.net project

Bruce Thomson / Jewel spider / Spiny spider (Austracantha minax) on leaf, Wet Tropics World Heritage area, Queensland, Australia.

Bruce Thomson / Jewel spider / Spiny spider (Austracantha minax) on leaf, Wet Tropics World Heritage area, Queensland, Australia.

Bruce Thomson / Jewel spider / Spiny spider (Austracantha minax) hanging upside down on silk thread, Wet Tropics World Heritage area, Queensland, Australia.

Bruce Thomson / Jewel / Christmas spider (Austracantha minax) endemic spider with distinctive spines on abdomen, female moving along her strand of web, Toowoomba, Queensland. Australia.