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2 edition of Imprinting and mobility in young ring-billed gulls, Larus delawarensis found in the catalog.

Imprinting and mobility in young ring-billed gulls, Larus delawarensis

Roger M. Evans

Imprinting and mobility in young ring-billed gulls, Larus delawarensis

by Roger M. Evans

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  • 20 Currently reading

Published by Baillie re, Tindall & Cassell in London .
Written in English


Edition Notes

StatementRoger M. Evans.
SeriesAnimal behaviour monographs / editors J.M. Cullen, G.C. Beer -- vol.3, pt.3, Animal behaviour monographs -- vol.3, pt.3.
ContributionsCullen, J. M., Beer, Colin.
ID Numbers
Open LibraryOL13892182M

Ring-billed Gulls: There were several Ring-billed Gulls (Larus delawarensis) in this flock and they were relatively easy to pick out. The key features used to identify this gull are black wing-tips, the black ring around the bill, yellow legs, and a yellow eye. Other articles where Ring-billed gull is discussed: gull: The ring-billed gull (L. delawarensis) is common on inland lakes in North America and often gathers in large flocks to feed on plowed fields. The sooty gull (L. hemprichi) of the western Indian Ocean has a dark brown hood and a grayish brown mantle. Ross’s gull.

Imprinting and Mobility in Young Ring-Billed Gulls, Larus delawarensis, , Institute of Animal Behavior, Rutgers University, Newark, New Jersey, Animal Behaviour Monographs, Volume 3, Part 3: pages with 8 figures and 24 tables. Evans, R. M. During the summer of , more than California gulls (Larus californicus) and ring-billed gulls (Larvus delawarensis), primarily fledglings, died on an island in Lake Sakakawea near New Town, North Dakota (USA). Mortality was attributed largely to chlamydiosis. Necropsy findings in nine carcasses included splenomegaly (n = 9), hepatomegaly (n = 4), and pericarditis (n = 1).

Gulls to be reported as Ring-billed. This short note should help highlight the pitfalls and hope-fully help you find your own American gull Ring-billed Gull Ring-billed Gull Larus delawarensis is a mono-typic gull that breeds from northwestern USA and southern British Colombia east through the Great Lakes region to the Gulf of St. Lawrence;. Percentage of time spent in four activities by ring-billed gulls (Larus delawarensis). The proportion of time spent in nest-site attendance was strongly affected by sex (w i = ; Table 1). The proportion of time birds spent flying was affected by the date of first capture (w i = ), decreasing as capture date increased, followed by a Cited by: 5.


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Imprinting and mobility in young ring-billed gulls, Larus delawarensis by Roger M. Evans Download PDF EPUB FB2

Imprinting and mobility in young ring-billed gulls, Larus delawarensis. London: Ballière, Tindall & Cassell, (OCoLC) Document Type: Book. Imprinting and Mobility in Young Ring-Billed Gulls, Larus delawarensis Author links open overlay panel Roger M.

Evans a *. Show moreCited by: Imprinting and Mobility in Young Ring-Billed Gulls, Larus delawarensis [R.M. EVANS] on *FREE* shipping on qualifying offers. Imprinting and Mobility in Young Ring-Billed Gulls, Larus delawarensis,Animal Behaviour Monographs, Volume 3, Part 3: pages with 8 figures and 24 tables.

Evans] on *FREE* shipping on qualifying : R. Evans. Ring-billed Gull cm; g; wingspan cm. Three-year gull. The breeding adult has a white head, body and tail,  pale grey mantle and upperwings; black outer. Young were exposed to the call of an Larus delawarensis book ring-billed gull (Larus delawarensis) paired with a visual imprinting stimulus (S +).This exposure was alternated with one of three (S −) conditions; a call from a different conspecific adult, silent periods, or a call from a different visually associated call and the second conspecific call were then used for auditory discrimination by: 9.

Ring-billed Gull (Larus delawarensis) Adults and Fledglings - Niagara Falls New York - J Ring-billed gulls are medium-sized birds. Males are slightly larger than females. They are about cm long and weigh about g.

Females are about cm long and weigh about g. Males and females have a wingspan of about cm. The backs and shoulders of ring-billed gulls are pale bluish-gray, and the head is white. Ring-billed Gull delawarensis 1st PB moult, July 17Daytona Beach, FL. (Tore Grebberg). Ring-billed Gull delawarensis 2nd cycle, October 27Dallas, TX.

(Wikipedia Commons). Ring-billed Gull delawarensis 2nd cycle, January 03Seward Park, Seattle (Amar Ayyash). Variation in Juvenile Ring-billed Gulls (Part 1) Juvenile Ring-billed Gulls (Larus delawarensis) are quite distinctive within their range, but anyone who's ever spent a little time observing this age group quickly comes to the realization that characterizing a "typical" youngster is no simple task.

The Ring-billed Gull is probably the most common gull found in the state. Adapted well to living with humans, it can often be found sitting in parking lots or scavenging at landfills.

The yellow legs and overall size help to distinguish the species from other similarly plumaged gulls found in the state, as does the characteristic black ring. Gulls are often the most abundant and visible coastal birds, regardless of the season.

This is largely because they are remarkably successful at adapting to different environments and are opportunistic feeders. In the winter, ring-billed gulls (Larus delawarensis) are one of the most common gulls in Massachusetts, perhaps even outnumbering Herring gulls and Black-backed.

Click here for more information about the Red List categories and criteria Justification of Red List category This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence.

While the breeding ecology of gulls (Laridae) has been well studied, their movements and spatial organization during the non-breeding season is poorly understood. The seasonal movements, winter-site fidelity, and site persistence of Ring-billed (Larus delawarensis) and Herring (L. argentatus) gulls to wintering areas were studied from –Cited by: 5.

Ring-billed gulls (Larus delawarensis) and gray gulls (Larus modestus) are two species active both by day and night. We have investigated the retinal adaptations that allow the diurnal and nocturnal behaviours of these two species.

Electroretinograms and histological analyses show that both species have a duplex retina in which cones outnumber Cited by: ring‐billed gull Larus delawarensis Kingdom: Animalia Division/Phylum: Chordata Class: Aves Order: Charadriiformes Family: Laridae FEATURES An adult ring‐billed gull is 18 to 20 inches long.

Its body has gray feathers with long, wide wings. The. Order: Charadriiformes (gulls and shore birds) Family: Laridae (gulls, terns) Genus: Larus; Species: Larus delawarensis; Common Names: Ring-billed Gull Photos.

Click on each picture to display the larger, higher-resolution image. All photographs are copyrighted by their photographers. Larus delawarensis Lake Ella Tallahassee, FL Ma first-winter Ring-billed Gulls Larus delawarensis and Common Gulls Larus canus A new and closer study solves a problem of identification Anthony J.

Lauro and BarbaraJ. Spencer HE BREEDING RANGE of the Common or Mew Gull, œarus canus, is con- tlnuous from Iceland and northwestern Europe (L. canus) to eastern Siberia. Photo of Ring-billed Gull, range map, identification tips, sounds, and further information.

(Larus delawarensis) Ring-billed Gull is widespread and one of North America’s most common gulls. Ring-billed Gull – adult nonbreeding Hammonasset State Park, Madison, CT Ring-billed Gull – juvenile molting to 1st winter Hammonasset State Park, Madison, CT.

A before-and-after study from in the upper St. Lawrence River, Canada (Blokpoel & Tessier ) found that excluding ring-billed gulls Larus delawarensis from a ha island increased the number of common terns Sterna hirundo from zero in to pairs in (compared with pairs in before gulls colonised the island.© BirdID Nord University All rights Reserved English Albanian.Additional information: Find ring-billed gull information at ring-billed gull.

Larus delawarensis. 1; 2.