What is the average flying speed of an african sparrow

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We see that you're using an ad-blocker! You must login or signup first! Although 47 of the 74 worldwide swallow species are found in Africa, 1 only two species are named after the continent: the West African Swallow Hirundo domicella and the South African Swallow Hirundo spilodera , also known as the South African Cave Swallow.

Since the range of the South African Swallow extends only as far north as Zaire, 2 I felt fairly confident that this was the non-migratory African species referred to in previous discussions of the comparative and cooperative weight-bearing capabilities of African and European swallows. Kinematic data for both African species was difficult to find, but the Barn or European Swallow Hirundo rustica has been studied intensively, and kinematic data for that species was readily available.

Because wing beat frequency and wing amplitude both scale with body mass, 5 and flight kinematic data is available for at least 22 other bird species, 6 it should be possible to estimate the frequency f and amplitude A of the European Swallow by a comparison with similar species.

With those two numbers, it will be possible to estimate airspeed U. Actually, wrong. By comparing the European Swallow with bird species of similar body mass, we can estimate that the swallow beats its wings 18 times a second with an amplitude of 18 cm:.

Note that even the tiny Zebra Finch flaps its wings no more than 27 times a second while cruising. If we ignore body mass and look only at bird species with a similar wingspan, we can estimate an average frequency of 14 beats per second and an amplitude of 23 cm:. By averaging all 6 values, we can estimate that an average European Swallow flies at cruising speed with a frequency of roughly 15 beats per second, and an amplitude of roughly 22 cm.

For a European Swallow flying with our estimated wingbeat amplitude of 22 cm, the predicted pattern of cruising flight ranges from a Strouhal number St of 0.

King Arthur: [exasperated] Will you ask your master if he wants to join my court at Camelot?! A group of coconuts is called a group of coconuts. Bonus fact: The airspeed velocity of an unladen swallow is roughly The Barn Swallow may be the fastest swallow. The Barn Swallow is the only North American swallow with a deeply forked tail.

Guard: indcredulous What, a swallow , carrying a coconut? Arthur: It could grip it by the husk! French : Go and boil your bottoms, you sons of a silly person.