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- Spring in Spain Birding and History Private Tour 2018 Trip Report 19 April - 3 May 2018 (15 Days)
- Movement Patterns of Common Crossbills Loxia Curvirostra in Europe
- Red Crossbill Types, Settle Most Readily in Areas Where Cone Sizes and Types Are Most Similar to Those Found in Core Range
- Red Crossbill Loxia Curvirostra
- Highlights of Europe 21St May to 15Th June (26 Days) - Highlights of Spain 21St May to 28Th May 2021 (8 Days)
- Colorado's Crossbill Types
- Diversifying Coevolution Between Crossbills and Conifers
- (212) Notes. Two-Barred Crossbill in Nottinghamshire
- First Record of the White-Winged Crossbill in California
- Red Crossbill Types in Colorado: Their Ecology, Evolution, and Distribution
- Call Types of the Red Crossbill in the San Gabriel, San Bernardino, And
- Wild Spain Tour (Dani Lopez-Velasco)
- Finland & Arctic Norway
- Delimitation of Call Types of Common Crossbill (Loxia Curvirostra)
- Table of Contents
- Red Crossbill in the West Virginia Mountains
- The White-Winged Crossbill in Captivity
- Finches and House Sparrow Wildlife Note
- Reproductive Endocrinology of a Free-Living, Opportunistically Breeding Passerine (White-Winged Crossbill, Loxia Leucoptera)
- Loxia Leucoptera)
- 9 Days Inner Mongolia Owls Trip
- The Evolution, Ecology, and Decline of the Red Crossbill of Newfoundland
- Identification of Bonelli's Warblers
- European Goldfinch in New York.--On May 27, 1940, Mrs
- Red Crossbill Loxia Curvirostra
- Red Crossbill Percna Subspecies Loxia Curvirostra Percna
- Best of Europe
- Red Crossbill (Loxia Curvirostra) Call-Types of New York
- Passerine Assessment
- On the Relative Importance of Ecology and Geographic Isolation As Drivers for Differentiation of Call Types of Red Crossbill Loxia Curvirostra in the Palearctic
- Finland: Owls, Taiga, and Fjords 7 Or 12 Days 3 – 14 June 2020 3 – 14 June 2021
- 1967 33 the Adaptive Radiation and Feeding Ecology Of
- Alpha Codes for 2168 Bird Species (And 113 Non-Species Taxa) in Accordance with the 62Nd AOU Supplement (2021), Sorted Alphabetically by English Name
- Sagebrush Songbird Survey by Christi Norman and Lindell Haggin