Zoology
- 181
- BirdMinds: Exploring Bird Intelligence
- Examples of avian intelligence are reviewed for many different bird species, based upon scientific and anecdotal evidence.
- 183
- Creches
- Article describing how some birds adopt the strategy of grouping their young, leaving them with a guardian while both parents go off to forage.
- 184
- EcoBirds Behaviour
- Provides a series of bird articles covering nesting, song, migration and the curious habit of anting.
- 185
- Electronic Resources on Ornithology
- Annotated links and ornithological articles by Christopher Majka.
- 186
- Flight in Birds
- How do birds fly? An introduction to flight in birds examining wing shape, airflows, flapping flight and gliding.
- 187
- Incubation: Heating the Egg
- Most birds create the required temperature by sitting on their eggs but some transfer heat through their webbed feet, and the megapodes of Australia bury them in a mound of decaying vegetation.
- 189
- Ornithology: Science of Birds
- Includes data on the science of wild birds, with an emphasis on conservation and education.
- 190
- Parental Care
- The young of passerines when first hatched are naked, blind, and helpless and require much care which involves feeding, training and protection from predators.
- 191
- Polygyny
- Most birds are monogamous, but in some species the occurrence of polygyny, where one male mates with more than one female, is related to high-quality territories with an abundance of resources.
- 192
- Population Dynamics
- Essay discussing the factors behind the variation in the number of individuals in a bird population over time.
- 193
- Sense of Direction
- Article from the Princeton Weekly Bulletin outlining how Biologist Martin Wikelski is helping to settle the long-standing debate over how migratory birds manage to navigate in darkness and bad weather.
- 194
- Sexual Selection
- Female birds of some species tend to choose as mates those males holding the most desirable territories, but there is little evidence that females preferentially select males with different degrees of ornamentation.
- 195
- Site Tenacity
- Many birds return to the same nesting site each season. This essay discusses why this should be so.
- 196
- Territoriality
- Article describing how birds try to exclude others of the same species from their home range.
- 197
- The Avian Embryo
- Article describing the development of the embryo and how to observe and exhibit it while it is alive and functioning or as a preserved specimen.
- 198
- Urban Birds
- Article discussing how birds have adapted to urban foraging amid the artificial concrete and steel ecosystems of cities.