Birds - Advanced Honor

Nature Study

Requirements

1. Have the Birds Honor.

   Answer: You must have completed the Birds Honor (basic level) before starting Birds - Advanced. The basic one covers general identification, basic anatomy and the characteristics of the main orders, the foundation for the more technical content of the advanced level. — The Birds → Birds Advanced progression ensures that the Pathfinder masters fundamental knowledge before entering subjects such as protection laws, detailed anatomy, banding and migration. Prerequisites protect against failures at the more technical levels of the honor.

2. Know the bird protection laws in your country. Present this item through a report.

   Answer: In Brazil, the main laws: Law 5,197/1967 (protection of fauna), Law 9,605/1998 (environmental crimes), and CONAMA Resolution 346/2004 on wild birds. — Law 5,197 is historic — it has banned professional hunting since 1967. Fines reach R$ 5,000 per specimen for common birds and up to R$ 50,000 for threatened ones. CETAS (Screening Centers) receive seized birds. Decree 6,514/2008 details specific sanctions for environmental crimes.

3. Using a diagram provided by the instructor, identify the main anatomical and morphological parts of a bird.

   Answer: Identify the main parts: beak, nostrils, eyes, ears (covered by feathers), neck, wings (with primary, secondary and covert feathers), chest, back, tail, legs (with tarsus and toes), claws and cloaca. — The primary feathers (outer wing) generate propulsion; the secondary ones (inner wing) provide lift. The cloaca is the single opening for excretion and reproduction. The beak varies by diet (curved for a carnivore, long for nectar). The skeleton is light and hollow to facilitate flight, a unique characteristic of modern birds.

4. What is the importance of feathers for birds?

   Answer: Feathers serve for flight (propulsion and lift), thermoregulation (maintaining body heat), waterproofing (repelling water), camouflage (protection against predators), visual communication (courtship) and mechanical protection of the skin. — Feathers evolved from the scales of ancestral reptiles. Each bird has between 1,500 and 25,000 feathers. The annual molt renews worn feathers. Penguin feathers retain insulating air; duck feathers have waterproofing oil. The peacock uses colorful feathers for mating. They are so important that without them the bird dies.

5. In what way are the feet, legs and beaks of birds modified to adapt them to their environment?

   Answer: Adaptations by habitat: aquatic birds have webbed feet (duck); birds of prey have sharp curved claws (eagle); tree birds have opposed toes (parrot); ground birds have long legs (ostrich). — Evolutionary theory explains these adaptations over millions of years. Each ecological niche favored specific characteristics. A toucan's beak is light despite its size — an internal structure of bony foam. The flamingo's beak is inverted, filtering water with its head turned downward.

6. Identify, through images, birds that present:
   • Feet modified for swimming
   • Feet adapted for walking or hopping
   • Feet adapted for climbing
   • Feet adapted for perching
   • Beak adapted for boring into wood
   • Long beak and tongue for extracting nectar from flowers
   • Beak adapted for tearing off pieces

   Answer: 1) Feet modified for swimming: aquatic birds such as the duck and the goose, which have toes joined by membranes (webbed feet) that function as oars. 2) Feet adapted for walking or hopping: terrestrial and garden birds such as the sparrow, the thrush and the rufous-collared sparrow, with thin feet suited for walking on the ground and making small hops. 3) Feet adapted for climbing: birds such as the woodpecker and the parrot, with toes turned two forward and two backward (zygodactyl feet), which helps them grip and climb on trunks. 4) Feet adapted for perching: most songbirds (passerines), such as the thrush and the tanager, with toes that close firmly around the branch to stay perched. 5) Beak adapted for boring into wood: the woodpecker, with a strong, straight and pointed beak, used to drill into trunks and look for insects. 6) Long beak and tongue to extract nectar from flowers: the hummingbird, with a thin and long beak (often curved) and a long tongue, suited for reaching the nectar deep in the flowers. 7) Beak adapted for tearing off pieces: birds of prey such as the hawk, the falcon and the owl, with a strong, curved, hook-shaped beak, used to rip and tear off pieces of flesh from the prey. — Each adaptation reflects the diet and habitat. A woodpecker pecks up to 20 times per second on wood without brain damage thanks to the special structure of its skull. The hummingbird has a tubular tongue like a straw. The claws of raptors generate pressure of up to 750 psi, enough to kill prey up to 4 times their size.

7. About hummingbirds, know:
   • What do hummingbirds eat in nature and how often?
   • Why are hummingbirds not afraid of large mammals or birds?
   • How do the movements of their wings differ compared to other birds?
   • How fast are they able to fly?
   • How fast do their wings and heart beat?
   • What is the shape of the tongue?

   Answer: About hummingbirds: 1) Feeding: they eat nectar from flowers (rich in sugar for energy) and small insects and spiders (a source of protein), feeding many times a day due to the high energy expenditure. 2) Flight: they beat their wings in a figure-'8' pattern (and not just up and down), which allows hovering flight (stationary in the air), sideways and even backward - unique among birds. The wings beat up to 50-80 times per second. 3) Importance: they are essential pollinators, transporting pollen between red tubular flowers while feeding. They have an accelerated metabolism and a very fast heart, entering torpor (an energy-saving state) at night or in the cold. — Hummingbirds are the only birds that fly backward. They consume the equivalent of 50% of their own weight in nectar daily. In nighttime hibernation (torpor), the heart drops from 1200 to 50 bpm. A tubular tongue with 2 channels pumps nectar 18 times per second. There are 340+ species, all in the Americas.

8. Why do birds migrate?

   Answer: Birds migrate mainly in search of food (scarcity in winter), favorable climate (escaping the cold), reproduction (safe places for nesting) and photoperiod (the change in sunlight triggers the instinct). — The Arctic tern (Sterna paradisaea) makes the largest known migration: about 70,000 km per year, between the Arctic and Antarctica. Swallows migrate from north to south at the end of summer. Orientation mechanisms: the Earth's magnetic field, the position of the sun and stars and geographic memory. Climate change affects migration patterns.

9. What is bird banding (ringing)? How does it contribute to information about migrations, behavior and social structure? What other mechanisms are used to monitor birds?

   Answer: Banding is the technique of attaching to the bird's leg a band (a metal or plastic ring) with a unique code/number, allowing the individual to be recognized if it is recaptured or re-sighted. How it contributes: 1) Migration - recaptures in distant places reveal routes, distances and times of movement; 2) Behavior - it shows fidelity to the nest/territory, foraging habits and dispersal of the young; 3) Social and population structure - it allows estimating longevity, survival rates, population size, and the ratio between sexes and ages. Other monitoring mechanisms: colored bands and flags (read at a distance, without recapture); radio-telemetry (a VHF transmitter tracked by an antenna); satellite transmitters and GPS/geolocators (loggers) to follow routes in real time or upon recapture; marking with paints/wing tags; identification by song (bioacoustics); and cameras/camera traps at nests. — CEMAVE (National Research Center for the Conservation of Wild Birds) has coordinated banding in Brazil since 1977. Bands have a unique number registered in a worldwide database. A small GPS (1g) is viable for medium-sized birds. Recaptures in other countries reveal complete and detailed migratory routes.

10. Mention the origin and final destination of 10 migratory species that occur on your continent, preferably in your country or region.

    Answer: Mencione a origem (área de reprodução) e o destino final (área de invernada) de 10 espécies migratórias que ocorrem no Brasil (adapte à sua região): (1) Maçarico-branco (Calidris alba): tundra do Ártico (América do Norte) → praias do litoral brasileiro; (2) Maçarico-de-sobre-branco (Calidris fuscicollis): tundra ártica do Canadá → sul da América do Sul, incluindo o Brasil; (3) Maçarico-acanelado (Calidris subruficollis): tundra ártica → campos do sul do Brasil e Pampa; (4) Batuiruçu (Pluvialis dominica): tundra ártica da América do Norte → campos e brejos do centro-sul da América do Sul; (5) Trinta-réis-boreal (Sterna hirundo): hemisfério norte → litoral brasileiro; (6) Falcão-peregrino (Falco peregrinus tundrius): Ártico da América do Norte → Brasil e América do Sul; (7) Maçarico-de-perna-amarela (Tringa flavipes): norte do Canadá/Alasca → brejos e lagoas do Brasil; (8) Maçarico-grande-de-perna-amarela (Tringa melanoleuca): regiões boreais da América do Norte → áreas úmidas do Brasil; (9) Maçarico-rasteirinho (Calidris pusilla): Ártico da América do Norte → litoral do norte e nordeste do Brasil; (10) Tesourinha (Tyrannus savana, população austral): centro-sul da América do Sul (Argentina/sul do Brasil) → Amazônia e norte do continente no inverno austral. — Brazil receives migrants from the Northern Hemisphere (they arrive in our summer = their winter) and from the far south. Sandpipers come from the American Arctic, stopping over in wetlands. Birds of the South Atlantic migrate along the coast. Use guides such as Sibley or Avesbrasil.com.br for precise data on migratory routes.

11. Describe at least 3 different ways birds use to orient themselves on their journeys.

    Answer: Three ways migratory birds orient themselves: 1) Magnetoreception: they perceive the Earth's magnetic field (through magnetite crystals in the beak and sensitive proteins in the retina), functioning as an internal compass. 2) Astronomical navigation: they use the position of the sun during the day and of the stars (with the North Star as a reference) at night to guide themselves. 3) Geographic landmarks (visual markers): they follow rivers, coastlines, mountain ranges and known terrain. Some species also use smell and the memory of routes learned with the flock. — Magnetoreception was discovered in homing pigeons. Birds have magnetite crystals in the beak and cryptochrome proteins in the eyes that react to the magnetic field. Swallows use the sun as a primary reference. Geographic memory explains how birds return to the same nest year after year consecutively.

12. Make a list of 30 bird species that you have personally observed. For each species on this list, note the following:
    • Name
    • Date of observation
    • Place of observation
    • Habitat (i.e., field, woods, river, lake, etc.)

    Answer: 30 different birds is achievable in 1-2 months of active observation. Apps such as eBird (Cornell University) allow georeferenced records and help the scientific community. Urban parks have 50-80 species; preserved forests reach 200+. Getting up in the morning (5-8h) is the best time to observe.

13. Make a list of 10 bird species that you identified by sound, outdoors.

    Answer: Identifying by sound is an advanced birdwatching skill. Merlin (Cornell Lab) uses AI to recognize songs automatically, with 90%+ accuracy. WikiAves has a Brazilian catalog with audio. Songbirds vocalize more at dawn (the dawn chorus). Training requires hours of practical fieldwork.

14. Create a collection with the common and scientific names of 60 birds (images or photos), of which at least 50 must be typical of your country.

    Answer: Assemble a physical or digital collection of 60 birds: 50+ typical of Brazil (thrush, great kiskadee, toucan, macaw, black-fronted piping guan, hawk) and up to 10 international ones. For each one, include a clear image, the common name and the scientific name in Latin. — Brazil has ~1,900 species of native birds, the third largest diversity in the world. The toco toucan, hyacinth macaw and harpy eagle are iconic. WikiAves.com.br has public-domain photos and scientific names. Presenting them by order (Passeriformes, Falconiformes, etc.) helps to understand Brazilian taxonomy.

15. Take part in a group walk to observe birds. Make a report about the walk and list the materials needed for a good bird-watching walk.

    Answer: Take part in a birdwatching walk with a group, in a park or forest. Materials: binoculars (8x42 standard), field guide, notebook, the Merlin Bird ID app, water, hat, neutral clothing, insect repellent. — 8x42 binoculars are standard (8x magnification, 42mm objective). Wearing neutral colors (green, brown) avoids scaring the birds. Walk silently, stopping frequently. Mornings (5h-9h) and late afternoons have more activity. Groups share discoveries and accelerate the learning of visual identification.