Louisiana Waterthrush (Parkesia motacilla) Science Article 2 abstract Cozumel Island is located in the Caribbean Sea between 20 16 and 20 36N and 86 44 and 87 02W, 17.5 km off the northeastern coast of the Yucatan Peninsula. We visited the island monthly from August 1994 to August 1995. During each visit, we performed 25 […]
An evaluation of of common loon (Gavia immer) demography, migration patternsand genetic structure using nuclear microsatellite and mitochondrial DNA evidence.
Loon (Gavia immer) Science Article 2 abstract The proposed project uses genetic markers from nuclear and mitochondrial genomes to assess genetic structure, migration patterns and population dynamics in common loons (Gaviaimmer). Observations of loons on breeding grounds indicate that 1) mated pairs are highly philopatric, 2) effects of environmental contamination and habitat degradation can impair […]
Territorial takeover in Common Loons (Gavia immer)
Loon (Gavia immer) Science Article 1 abstract Breeding Common Loons (Guvia immer) are well known for vigorously defending their territory from conspecifics. Territory holders are not previously known to be supplanted by loons during the breeding season. I observed a pair of adult Common Loons displace a resident pair from their territory shortly after a […]
Territorial takeover in Common Loons (Gavia immer)
Loon (Gavia immer) Science Article 1 abstract Breeding Common Loons (Guvia immer) are well known for vigorously defending their territory from conspecifics. Territory holders are not previously known to be supplanted by loons during the breeding season. I observed a pair of adult Common Loons displace a resident pair from their territory shortly after a […]
Digestive Efficiency and Energy Requirements of Captive-reared Common Loons (Gavia immer)
Loon (Gavia immer) Science Article 3 abstract Many wild Common Loons have been exposed to mercury contamination; thisstudy will help increase understanding of how it affects their lives by providinginformation about digestive efficiency. The assimilated mass coefficient (AMC) foreight captive-reared Common Loons (Gavia immer) was determined by this studyto be 80% of dry fish. Rainbow […]
Digestive Efficiency and Energy Requirements of Captive-reared Common Loons (Gavia immer)
Loon (Gavia immer) Science Article 3 abstract Many wild Common Loons have been exposed to mercury contamination; thisstudy will help increase understanding of how it affects their lives by providinginformation about digestive efficiency. The assimilated mass coefficient (AMC) foreight captive-reared Common Loons (Gavia immer) was determined by this studyto be 80% of dry fish. Rainbow […]
Winter behavior of the common loon
Loon (Gavia immer) Science Article 4 abstract A 2-yr study was conducted on the winter behavior of the Common Loon (Gavia immer) at Weekapaug, Rhode Island. Behavior of loons was assessed by recording the type of activity every 60 s for a 5-min period. Activity budgets showed an increase in the amount of time spent […]
Winter behavior of the common loon
Loon (Gavia immer) Science Article 4 abstract A 2-yr study was conducted on the winter behavior of the Common Loon (Gavia immer) at Weekapaug, Rhode Island. Behavior of loons was assessed by recording the type of activity every 60 s for a 5-min period. Activity budgets showed an increase in the amount of time spent […]
Long-Winged Harrier Predation on Wattled Jacana Eggs
Long-winged Harrier (Circus buffoni) Science Article 1 abstract Long-winged Harriers (Circus buffoni) prey on small birds, mammals, and reptiles (ffrench, A Guide to the Birds of Trinidad and Tobago, 1973:1131. Although they take eggs of various species of birds (Haverschmidt, The Birds of Surinam 1968:67), no records are available on the efficiencies and rates of […]
First record of a long-toed stint (Calidris subminuta) in New Zealand
Long-toed Stint (Calidris subminuta) Science Article 1 abstract On 31 August 1997 Sheila Petch and Nick Allen were at Jarvis Road, Lake Ellesmere looking for shorebirds newly arrived from the Northern Hemisphere. While looking at a flock of recently arrived red-necked stints (Calidris ruflcollis) they noticed a bird of similar size, but with pale legs […]