Not only of birds
Botany
Whitey white
Cuppa
Purchases
100
Almost ten years ago a Chinese fisherman caught an unusual mutant fish with a pigeon-like head. Biologists were unable to study the fish for this reason.
He took a picture of it and released it.
100
Beautiful plants in this family include lady's slipper and phalaenopsis. 
Orchids
100
White Bridges, or Yukankoski, is the highest of these natural features in the Northern Ladoga region.
Waterfall
100
Black and green tea come from the same shrub called Camellia sinensis. In both cases harvesters pluck the uppermost buds and leaves from the plant. So what’s the difference?
It comes down to processing and oxidation, the chemical process that causes browning.
100
Before the holiday, a store owner in Kingston, Canada, forgot to do this. Several customers took their items and left money at the register.
Lock the store
200
At the Nest bar, located on a rooftop in Nantes, the chairs designed by Jean Julien are shaped exactly like this.
Egg-shaped 
200
Dandelions are about 30 centimeters, cacti are 6-8 meters, and camel thorns are up to 20 meters. What part are we talking about?
Root system
200
After reading the Riga edition of this novel, Mikhail Bulgakov was surprised by the anonymous author's ending and wrote in pencil in the margins: "Nonsense, written by an unknown author."
"The White Guard"
200
One of the most expensive Japanese varieties of this tea is called "gyokuro," or "jade dew."
Green tea
200
This is precisely why Sharik from Prostokvashino suggested buying meat at the store.
"There are more bones there."
300
It was he who played the protagonist Riggan Thomson in the movie "BIRDMAN".
Michael Keaton
300
The roots of legumes develop nodules containing bacteria that perform an important ecological function: they bind one of the atmospheric gases, thereby fertilizing the soil. Which gas is meant?
Nitrogen
300
This predator has a bite force of 18 kilonewtons—almost half that of, say, a saltwater crocodile. However, this is still sufficient.
Great White Shark
300
During World War I, this new item, nicknamed "tea bombs," appeared in German soldiers' rations.
Tea bag
300
In the 1930s, Italian philologist Ettore Lo Gatto loved buying books from second-hand book dealers near the Kitay-Gorod Wall, but when he visited Moscow a quarter of a century later, he experienced these two disappointments.
No wall, no second-hand book dealers
400
In the early 1950s, the Soviet Union began developing a surface-to-air missile system named after its chief designers, Sergo Beria and Pavel Kuksenko.
Berkut (now the S-25)
400
The pride of the Moscow State University Botanical Garden's greenhouse is the Canary Island Date Palm. This palm blooms regularly but never produces fruit. Why? 
This is a male specimen with male flowers.
400
This tradition has been known since at least 1775. Back then, elections were still held in the Quirinal Palace.
Releasing white smoke when the pope is elected.
400
It's estimated that in the 18th century, half of the tea consumed in England was like this, due to high taxes.
Imported illegally
400
THIS was the acquisition of the territories by the United States from the French First Republic in 1803. This consisted of most of the land in the Mississippi River's drainage basin west of the river.
The Louisiana Purchase (French: Vente de la Louisiane, lit. 'Sale of Louisiana')
500
Alexander Opekushin created the Moscow monument to this autocrat, and Artemy Ober placed the double-headed eagles at the corners of the pedestal. 
Alexander III
500
Arborescent pandanus trees grow on seashores, coastal dunes, and cliffs. This adaptation helps pandanus trees withstand hurricane-force winds and tides.
Extra adventitious roots (stilt roots) 
500
The current coat of arms of this country, which recently celebrated its centenary of independence several years ago, is adorned with nine white rosettes. 
Finland
500
In this garden, Ludwig Charlemagne built a teahouse, and Carlo Rossi a coffeehouse.
Summer Garden
500
Londoners used to joke about the East End Flea Market: they used to ask women to buy this skirt on the way out.
The one she was wearing, and it was stolen from her.