Animalist - zoology of animal

Explains how end-of-Mesozoic climate change, rising mountains, and swamp destruction around 70 million years ago reduced plants and favored birds and mammals, sealing dinosaurs' extinction.

Explain why earthworms do not sing or have ears, despite ancient beliefs. Detect vibrations and light through tactile and photoreceptive cells, revealing nocturnal behavior.

Earthworms change the ground by digesting organic matter and mixing soil, turning it finer, moister, and richer, while tilling the land and boosting crop health.

Leeches inject hirudin, an anticoagulant, causing continuous bleeding from a y-shaped wound after biting; remove with salt water and treat with silver nitrate or pressure.

Discover why clams' shells open after cooking as closing muscles lose contractile power while the ligaments remain elastic, letting hinges open the shells.

Change color through dermal pigment cells in shrimps and crabs that expand or contract with light and environment, while cooking leaves orange-red tones as pigments break down.

Explain why mature crabs migrate from freshwater to the sea to spawn and how females lay up to 100,000 eggs, with larvae returning upstream to mature over 3-5 years.

Shrimp migrate in large groups through reproductive, feeding, and overwintering migrations to preserve species, moving from deep waters to spawning grounds near the Bohai Sea and Korean Bay, then returning.

Spiders extend long aerial threads from anchor points to span between distant trees, forming a sky bridge that becomes a suspension web built from thick cables of proteinaceous silk.

Explore how insects hear with diverse auditory organs, from tympanic membranes in cicadas, crickets, and katydids to fine antennal hairs in male mosquitoes, and how rhythmic patterns differ from melodies.

Explore why insect blood often appears colorless, while higher animals show red blood from hemoglobin, and learn about blister beetle toxins and pigment-driven colors in some species.

Dragonfly larvae spend 1–2 years in water, using an extendable lower lip to catch prey, and their dipping into water signals their eggs-laying behavior.

Explain why termites threaten buildings in tropical humid regions, as they bore into cellulose in wood and paper, aided by termite protozoan symbiosis, cutting water supply lines controls them.

Explain why flies and mosquitoes have only one pair of wings. Highlight halteres as hind-wing–derived balancing organs that stabilize flight and reflect their evolutionary role in Diptera.