Download Do Hummingbirds Hum?: Fascinating Answers to Questions About by George C. West, Carol A. Butler PDF

By George C. West, Carol A. Butler

Hummingbirds could be the smallest birds on the earth, yet they've got the largest appetites. Their wings flutter on regular fifty to 80 occasions each one moment as they stopover at enormous quantities of plants over the process an afternoon to sip the candy nectar that sustains them. Their hearts beat approximately twelve hundred occasions a minute and their fast respiring permits those impressive birds to maintain their detailed demeanour of flight. they could hover within the air for lengthy sessions, fly backwards utilizing forceful wings that swivel on the shoulder, and dive at approximately 200 miles in line with hour. local in simple terms to the Americas, a few hummingbirds were recognized emigrate from Mexico to Alaska during a season. staring at a hummingbird at a yard feeder, we simply see its glittering iridescent plumage and its lengthy, slender beak; its swiftly relocating wings are a blur to our eyes.These tiny, colourful birds have lengthy interested birders, beginner naturalists, and gardeners. yet, do they honestly hum?In Do Hummingbirds Hum? George C. West, who has studied and banded over 13,500 hummingbirds in Arizona, and Carol A. Butler supply an outline of hummingbird biology for the overall reader, and extra specific discussions in their morphology and behaviour in the event you are looking to fly past the fundamentals. Enriched with appealing and infrequent images, together with a bit in bright colour, this attractive query and resolution advisor bargains readers a variety of information regarding those wonderful pollinators in addition to information for attracting, photographing, and looking at hummingbirds within the wild or in captivity..

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Additional resources for Do Hummingbirds Hum?: Fascinating Answers to Questions About Hummingbirds (Animal Q&a Series)

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When the nectar pool is small, only the tip of the tongue collects the solution and so the intake rate is considerably slower. When a flower’s nectar is depleted, it is replaced in short order so that the nectar-feeding pollinators will continue to visit and fertilize the plants. To gather the protein they need in their diet, hummingbirds forage for insects in various ways. The erratic movement made by the birds as they chase tiny insects and spiders is called gnatting. “Hawking” refers to catching insects while both the insect and the bird are in flight, and “gleaning” describes the hummingbird’s hovering to snatch up insects that are sitting on the surfaces of leaves and branches.

There is some competition for nectar from the same flowers, but many species have preferences for flowers with certain shapes that provide them with fast, safe access, and they are selective about the sweetness, consistency, and composition of the nectar they seek. The result is that pollinators can usually share the resources of a habitat. The tubular-shaped flowers hummingbirds prefer hold nectar concentrated at their base. The male parts of Cross-section of a tubular flower shows how the plant is formed to deposit pollen on the bird as it feeds and to pick up pollen carried on the bird’s plumage at the same time.

Hummingbirds’ kidneys and intestinal tract do not absorb water as readily as do those of other animals, helping to avoid water intoxication, a potentially fatal brain dysfunction from drinking too much water. The result is that hummingbirds produce urine, unlike most birds, which instead excrete semisolid uric acid. Physiological ecologist Carlos Martinez del Rio along with Bradley Hartman Bakken and colleagues at the University of Wyoming examined the function of the kidneys of Broad-tailed Hummingbirds Selasphorus platycercus and Green-backed Firecrowns Sephanoides sephanoides to try to understand how they balance the need to eliminate large quantities of water with their susceptibility to dehydration when they are not feeding.

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