Mnemonic 1: IUCN Red List Categories — "Every Wild Cat Eats Very Neat Lunches Daily, Never Eats (junk)"

• Extinct (EX)
• Wild — Extinct in the Wild (EW)
• Critically Endangered (CR)
• Endangered (EN)
• Vulnerable (VU)
• Near Threatened (NT)
• Least Concern (LC)
• Data Deficient (DD)
• Not Evaluated (NE)

Mnemonic 2: India's 4 Biodiversity Hotspots — "WISH"

• Western Ghats & Sri Lanka
• Indo-Burma
• Sundaland (Nicobar Islands)
• Himalayas "I WISH India's 4 hotspots are forever protected."

Mnemonic 3: HIPPO — Causes of Biodiversity Loss

• Habitat loss and fragmentation (PRIMARY)
• Invasive alien species
• Population growth and overexploitation
• Pollution
• Overall co-extinction (and climate change) "A HIPPO stomping through biodiversity destroys everything."

Mnemonic 4: Z Value Memory — "Islands are Z-ealous (steep)"

• Islands = ZEALOUS = high Z = steep slope = 0.6–1.2
• Continents = calm, gentle = low Z = 0.1–0.2

Mnemonic 5: National Parks vs. Wildlife Sanctuaries — "Parks are Padlocked"

• Parks = Padlocked = strict = No human activity
• Sanctuaries = some slack = limited human activity allowed

Mnemonic 6: Hotspot Criteria — "1500 and 70"

• At least 1,500 endemic vascular plants
• At least 70% habitat lost
• "India scored 1,570 in a game where you need BOTH points to win"

Mnemonic 7: 4 Important Scientists — "Hum Wil-son Ne Cost" (Hindi: I Wilson's Name Cost)

• Humboldt → species-area relationship
• Wil-son → biophilia + island biogeography
• Norman Myers → hotspots
• Costanza → ecosystem services ($33T)

Mnemonic 8: India's Conservation Numbers — "18, 106, 566"

• 18 biosphere reserves (India's best)
• 106 national parks (strict)
• 566 wildlife sanctuaries (flexible) "18 Biosphere reserves, 106 Parks, 566 Sanctuaries — decreasing strictness, increasing numbers"