Michel van Royen
Yellow-legged Gull
- Birds
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- in the spotlight
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- Groundhoppers
- Grasshoppers
- Katydids, Crickets, and Allies (Ensifera)
- Praying Mantises (Mantidae)
- Grasshoppers, Locusts, and Allies (Caelifera)
- The biology of birds in the wild
- 1 – Birds in Animal Paradise
- 2 – The evolution of birds: a look at their fosil past
- 3 – Specification and systematics are important components of biology:
- 4 – Bird feathers: what, where and why
- 5 – The art of flying, how birds do it
- 6 – Fuel for the bird engine
- 7 – Every bird sings as it is beaked
- 8 – From beak to cloaca
Habitat: Cliffs, islands, roofs of buildings along the coast. Also marshes inland and dunes. Winters mainly along the coast, inland on rubbish dumps and drinking water reservoirs. Adapts everywhere and is increasing in numbers.
Appearance: Resident bird in Portugal, Spain and the rest of the Mediterranean region. In Belgium and the Netherlands, extremely rare breeding bird – year bird – migrant and winter visitor in very small numbers.
Breeding season: April – August, colonies near water, 1 – 3 eggs.
Characteristics: Length 52 – 58 cm, wingspan 120 – 145 cm, weight 750 – 1250 grams, age 19 years.
Food: Versatile, vertebrates and waste.
