Booted warbler

Abstract: The apparent adult survival rate is one of the key population parameters of migratory birds. The widely used Cormack–Jolly–Seber capture–mark–recapture model has a number of disadvantages, the main one of which is the impossibility of discerning mortality and permanent emigration. The accuracy of survival estimates can be increased using a multistate capture–mark–recapture model, with the help of which it is possible to assess the survival of successful and unsuccessful birds separately. We used this model to estimate the apparent survival rates of adults in local populations of three ground-nesting passerines: Booted Warbler (Iduna caligata), Whinchat (Saxicola rubetra), and Yellow Wagtail (Motacilla flava), all breeding on abandoned agricultural lands. We studied the reproductive success of 472 marked pairs and analyzed individual capture histories of 814 birds. The previous reproductive success was found to influence significantly the apparent survival of adults. This relation was best expressed in the Yellow Wagtail (apparent survival of successful birds, φ = 0.39 ± 0.06, vs. that of unsuccessful birds, φ = 0.19 ± 0.06) and the Whinchat (apparent survival of successful birds, φ = 0.32 ± 0.05, vs. apparent survival of unsuccessful birds, φ = 0.10 ± 0.05), but a little lower in the Booted Warbler (apparent survival of successful birds, φ = 0.33 ± 0.17, vs. apparent survival of unsuccessful birds, φ = 0.16 ± 0.13). Unsuccessful individuals leave the study area for good, while most of the successful birds return there the next year. Thus, the apparent survival rate of passerines evaluated with capture–recapture models is determined to a considerable degree by the previous reproductive success within local populations.

Abstract: First-year survival probability of migratory passerines during the period between fledging and first reproduction is a highly variable parameter that has a major effect on population dynamics. We used a long-term mark–recapture dataset (2002–2018) to examine first-year survival of 3 passerine species breeding in abandoned agricultural fields of northwestern Russia: Booted Warbler (Iduna caligata), Whinchat (Saxicola rubetra), and Western Yellow Wagtail (Motacilla flava). We banded 3,457 nestlings, including 1,363 Booted Warblers, 1,699 Whinchats, and 395 Western Yellow Wagtails, and resighted 12 Booted Warblers, 29 Whinchats, and 13 Western Yellow Wagtails in the year after fledging. We evaluated first-year apparent survival rates using Cormack-Jolly-Seber models in MARK program within the multispecies approach. We tested effect of fledge date on the first-year apparent survival. In all focal species, first-year apparent survival rates were low and reached the lower limits known for migratory passerines. We found no differences in first-year survival rates among the 3 species: the estimated average first-year apparent survival rate of all species was 0.05 ± 0.01. The fledge date had a considerable impact on first-year survival rate: later fledge dates negatively affected first-year survival. We suggest that first-year apparent survival rates in our study were low due to low natal philopatry and high mortality in the post-fledging period. Low apparent first-year survival may be a specific feature of open-nesting birds breeding in abandoned fields that are low-quality habitats because of high predation pressure.

Abstract: SUMMARY.—Report on rare birds in Spain in 2003. This is the 20 th annual report of the Spanish Ornithological Society’s Rarities Committee. It considers 217 new records pertaining to 89 species, with an acceptance rate of 94 %. Species new to the Spanish list are those for Bohemian Waxwing Bombycilla garrulus (Basque Country, year 1959), River Warbler Locustella fluviatilis (Galicia) and Booted Warbler Hippolais caligata (Balearics, 1998), as well as those for Hooded Vulture Necrosyrtes monachus (Andalucia) and Lesser Moorhen Gallinula angulata (Andalucia), although in the last two species on birds of unknown origin. Here included are also the second accepted records for Lesser Spotted Eagle Aquila pomarina, American Coot Fulica americana, Lesser Sand Plover Charadrius mongolus (first for the Canary Islands), White-tailed Plover Vanellus leucurus (first for the Iberian Peninsula) and Forster’s Tern Sterna forsteri, as well as the third ones for Masked Booby Sula dactylatra, White-tailed Eagle Haliaeetus albicilla, Radde’s Warbler Phylloscopus schwarzi, Dusky Warbler Phylloscopus fuscatus and the eastern subespecies of Woodchat Shrike Lanius senator niloticus.

Abstract: This is the 30th annual report and the 31 st announcement from the Norwegian Rarities Committee (NSKF). The majority of records treated here are from 2005, but some older records are also included. Norway follows taxonomic advises given by the Taxonomic Advisory Committee (TAC) in the Association of European Record and Rarities Committees (AERC). The systematic list of accepted records is set out in the following system: (1) The bird's Norwegian name, (2) scientific name, (3) the numbers in brackets, e.g. (2, 30/32, 1), refers respectively to the ( i ) total number of records/total number of individuals up to and including 1974, ( ii ) total number of records/total number of individuals from 1975 (the foundation year of NSKF), except ( iii ) records/individuals in 2005, (4) any breeding, (5) year, (6) county, (7) number of individuals, age (1K = first calendar year etc.), sex (if known) and sometimes circumstances («rm» means that the bird was ringed), (8) site and municipality, (9) date, (10) * indicates if the record was complemented by positive evidence, and type of the evidence (F = photo, V = video-recorded, L = tape-recorded, D = found dead), (11) observers' names in brackets, main observer(s) is specified first and emphasized with *, (12) roughly gives the species' distribution and (13) comments concerning the records. General trends With 260 accepted records presented in this report, 2005 was one of the best years in the his- tory of NSKF. A total of 62 accepted records from previous years complete the status of rare birds on the Norwegian Bird list. There are 17 records presented that have been shelved. Two thirds of these concerns presumed hybrid Herring x Glaucous Gulls or first year «Eastern Yellow Wagtails». These records have been shelved due to the lack of identification knowledge in the literature for such birds. Also presented are 46 records that for some reason have not been accepted. Record numbers for Norway was recorded for the following species during 2005: White-rumped Sandpiper Calidris fuscicollis (four records involving five birds), Barn Owl Tyto alba (three records), Desert Wheatear Oenanthe deserti (five records), Black-throated Thrush Turdus ruficollis atrogularis (four records) and Arctic Warbler Phylloscopus borealis (11 records involving 15 birds). Also, 2005 was the first year ever with multiple records of Ross's Gull Rhodostethia rosea (two records), Pallid Swift Apus pallidus (two records involving three birds) and Steppe Grey Shrike Lanius meridionalis pallidirostris (two records). Four records of «Eastern» Stonechat Saxicola torquatus maurus/stejnegeri were also an all time high. Species and hybrids new to the Norwegian list Two new species to the Norwegian category A list are presented in this report. This brings the official Norwegian bird list to 474 species. Included in this list are accepted records in category A-C. The new species were Siberian Rubythroat Luscinia calliope and Brown Shrike Lanius cristatus . Both were found at Utsira, Rogaland in early October. Hybrid Mallard Anas platyrhynchos x Gadwall Anas strepera at Innfjorden, Rauma, More og Romsdal and Mallard x American Black Duck A. rubripes at Surnadal, More og Romsdal were also new for Norway. Also published here are the 2nd & 3rd Egyptian Goose Alopochen aegyptiaca for Norway, 3 rd American Black Duck Anas rubripes , 3rd American Golden Plover Pluvialis dominica , 3rd Baird's Sandpiper Calidris bairdii , 3rd Upland Sandpiper Bartramia longicauda , 6th Spotted Sandpiper Actitis macularius , 5th Wilson's Phalarope Phalaropus tricolor , 3rd Laughing Gull Larus atricilla , 5th Franklin's Gull Larus pipixcan , 1st-2nd & 5th-6th Yellow-legged Gull Larus michahellis , 9th Caspian Gull Larus cachinnans , 4th Roseate Tern Sterna dougallii , 10th Calandra Lark Melanocorypha calandra , 5th-7th Blyth's Pipit Anthus godlewskii , 10th Pallas's Grasshopper Warbler Locustella certhiola , 2nd Thick-billed Warbler Acrocephalus aedon , c. 8th Booted Warbler Hippolais caligata , c. 3rd Western Bonelli's Warbler Phylloscopus bonelli , 9th & 10th record of Penduline Tit Remiz pendulinus and 4th & 5th Steppe Grey Shrike Lanius meridionalis pallidirostr is .