Rufous hummingbird

The rufous hummingbird is a tiny bird.

The males have bright orange-red feathers. They also have a shiny throat.

Females are a bit larger than males. They have green and white feathers.

These birds fly long ways each year. They travel to find flowers. They use a long tongue to drink sweet juice.

They also catch small bugs to eat.

At night, they rest to save energy. This helps them stay strong. They are very busy birds.

The rufous hummingbird is a small bird.

Males have bright orange-red feathers. They also have a shiny throat patch called a gorget.

Females are slightly larger than males. They have green and white feathers.

These birds fly very long distances. They move through the Rocky Mountains to find wildflowers.

Most birds spend the winter in Mexico. They eat nectar from flowers using a long tongue. They also catch insects while they fly.

Males and females act in different ways. This is called sexual dimorphism. This means the two sexes have different traits. Males have short wings. This helps them beat their wings fast to fight others. They defend areas with many flowers. Females have longer wings. This helps them fly far to find food.

These birds face new challenges. Many flowers bloom too early now. This happens because of climate change. Also, many insects are disappearing. This makes it harder for the birds to find food.

The rufous hummingbird is a tiny bird with amazing skills.

It has a long, straight, and slender bill. This bird belongs to a group called Selasphorus. This name comes from Greek words meaning "light-carrying." The word rufus is Latin for "red." These birds are very important to the places they visit. They move long distances to find food throughout the year.

These birds have a very busy way of living. They eat nectar from flowers using a long, extendable tongue. They also catch insects while they are flying. To save energy at night, they become torpid. Torpid means they enter a very sleepy state. When they hover, their wings do a lot of work. Most of their lift comes from the downstroke of the wing. This happens about 75% of the time.

People have studied these birds for a long time. A German naturalist named Johann Friedrich Gmelin described them in 1788. He first called them Trochilus rufus. He used descriptions from other people like John Latham and Thomas Pennant. Later, a man named William Swainson created the genus Selasphorus in 1832. The first birds were noted near Nootka Sound in Canada. This area is on the west coast of Vancouver Island.

There are many specific facts about how they live. Males have a bright orange-red throat patch called a gorget. Females are slightly larger than the males. Most of these birds fly through the Rocky Mountains from May to September. They go there to find many wildflowers. In the winter, they travel to the state of Guerrero in Mexico. This is a huge journey for a bird that weighs only 3 grams. They can even nest in Alaska.

Males and females have different bodies to help them survive. This is called sexual dimorphism. Males have shorter wings so they can beat them very fast. This helps them fight to protect areas with many flowers. Females have longer wings to help them fly more efficiently. They must fly farther to find food because males guard the best spots. Today, these birds face hard jobs due to climate change. Some flowers bloom too early for the birds to arrive. They also need more insects to eat during the winter.

The rufous hummingbird (Selasphorus rufus) is a tiny bird with remarkable aerial abilities.

It is a small species with a long, straight, and slender bill. This bird belongs to the genus Selasphorus, which contains nine different species. The name Selasphorus comes from Ancient Greek words meaning "light-carrying." The specific name, rufus, is the Latin word for "red." These hummingbirds are vital to the ecosystems they visit during their long journeys.

To understand how they stay energized, we must look at their unique metabolism. These birds feed on nectar using a long, extendable tongue. They also catch insects while flying to get nutrients. Because they are so small, they must feed frequently during the day. To save energy at night, they enter a state called torpor. This is a deep sleep that helps them conserve vital energy. When they are fasting, they oxidize fatty acids to power their bodies. However, they can switch to carbohydrate metabolism within only 40 minutes after feeding on nectar.

The way they fly is also very specialized. Scientists used digital imaging velocimetry to study their wing movements. They discovered that the bird supports its weight primarily during the downstroke. This downstroke provides about 75% of the total lift. The upstroke provides the remaining 25% of the lift. This mechanical process allows them to hover precisely while feeding on flowers.

There is a clear difference between the males and females, known as sexual dimorphism.

Adult males have a white breast and a bright, iridescent orange-red throat patch called a gorget. They may also have green feathers on their back or crown. Females are slightly larger than males and have green and white feathers. Their throats have some iridescent orange feathers in the center. Females also have dark tails with white tips and rufous bases. It can be difficult to tell females apart from Allen's hummingbirds without close inspection.

These physical differences help each sex survive in different ways. Males generally have shorter wings, which increases the metabolic cost of hovering. However, this allows them to beat their wings at high frequencies. This speed helps them chase and attack other birds to defend territories. Males are very aggressive and fight to protect areas with dense flowers. Females have longer wings, which makes their flight more efficient. Because males push them away from the best food, females must defend larger territories. This forces them to fly farther between flowers, so they need that efficient flight.

The history of this bird's classification involves several famous naturalists. The German naturalist Johann Friedrich Gmelin formally described the species in 1788. He originally placed it in the genus Trochilus. Gmelin based his work on descriptions from John Latham and Thomas Pennant. Later, in 1832, the English naturalist William Swainson introduced the genus Selasphorus. The type locality for the species was Nootka Sound on Vancouver Island. This is located on the west coast of Canada.

Migration is a massive part of their life cycle. Rufous hummingbirds migrate through the Rocky Mountains from May to September. They do this to take advantage of the wildflower season. Some individuals may stay in one region all summer. Most birds winter in the Mexican state of Guerrero. They travel an overland route to get there. This is a huge journey for a bird that weighs only 3 grams. They are even capable of nesting in Alaska, which is further north than any other hummingbird.

Today, the rufous hummingbird faces significant environmental challenges. In 2018, the IUCN Red List changed its status to near threatened. This change happened because the birds rely on insects during the winter. A global decline in insect populations due to pesticides affects them. Additionally, climate change is altering the timing of nature. Many flowers now bloom two weeks before the birds arrive. This means the birds might arrive too late to find enough food.