Some common advantages of primary data are its authenticity, specific nature, and up to date information while secondary data is very cheap and not time-consuming. Primary data is very reliable because it is usually objective and collected directly from the original source.

Data from an experiment is a primary source. Secondary sources are one step removed from that. Tertiary sources summarize or synthesize the research in secondary sources. For example, textbooks and reference books are tertiary sources.

Advantages: Secondary sources provide a variety of expert perspectives and insights. Also, peer review usually ensures the quality of sources such as scholarly articles. Finally, researching secondary sources is more efficient than planning, conducting, and analyzing certain primary forms of research.

Advantages: Primary sources directly address your topic and often provide information that is unavailable elsewhere. For example, the questions you compose for an interview or a survey will likely target your unique interest in the topic. Similarly, to test a particular hypothesis, you can design your own experiment.

Primary sources provide raw information and first-hand evidence. A secondary source describes, interprets, or synthesizes primary sources. Primary sources are more credible as evidence, but good research uses both primary and secondary sources.

Examples of secondary sources:

• Bibliographies.
• Biographical works.
• Reference books, including dictionaries, encyclopedias, and atlases.
• Articles from magazines, journals, and newspapers after the event.
• Literature reviews and review articles (e.g., movie reviews, book reviews)

The main difference between primary secondary and tertiary consumers is that primary consumers are the herbivores that feed on plants, and secondary consumers can be either carnivores, which prey on other animals, or omnivores, which feed on both animals and plants, whereas tertiary consumers are the apex predators …

Primary consumers are those that consume the primary producers (plants). For example- rabbits consume grass. Secondary consumers are those that consume the primary consumers (herbivores). For example- Snakes that consumes rabbit.

In temperate regions, for example, you will find secondary consumers such as dogs, cats, moles, and birds. Other examples include foxes, owls, and snakes. Wolves, crows, and hawks are examples of secondary consumers that obtain their energy from primary consumers by scavenging.

The larger fishes like tuna, barracuda, jellyfish, dolphins, seals, sea lions, turtles, sharks, and whales are tertiary consumers. They feed on the primary producers like phytoplankton and zooplankton, as well as secondary consumers like fish, jellyfish, as well as crustaceans.

Secondary Consumers

• Large predators, like wolves, crocodiles, and eagles.
• Smaller creatures, such as dragonfly larva and rats.
• Some fish, including piranhas and pufferfish.

Secondary consumers eat primary consumers. Many secondary consumers also eat plants, which makes them omnivores (meat and plant eaters).

Wolves are categorized as either secondary or tertiary consumers. However, in many food chains, wolves are apex predators.

Primary consumers who feed on many kinds of plants are called generalists. Secondary consumers, on the other hand, are carnivores, and prey on other animals. Omnivores, who feed on both plants and animals, can also be considered as secondary consumer. Humans are an example of a tertiary consumer.

Wolves are categorized as either secondary or tertiary consumers. However, in many food chains, wolves are apex predators. They would most often be tertiary consumers. Primary consumers eat producers, such as plants, so primary consumers are herbivores.

Ecosystems can also have tertiary consumers, carnivores that eat other carnivores. A bald eagle is an example of a tertiary consumer you might see near the coastal mangrove islands of the Everglades. Its diet includes predatory fish that eat algae-eating fish, as well as snakes that feed on grass-eating marsh rabbits.

The highest level is the tertiary consumer and they contain the least amount of energy because they do not produce their own food. Eagles are the tertiary consumers of their ecosystem because they are a top predator.

The primary consumers are those that feed on producers, while secondary consumers eat primary consumers. In grasslands, for example, grass acts as the producer, while mice that eat grass are the primary consumers. Predators of mice, such as snakes, are next up on the food chain as secondary consumers.

A sea gull is a secondary consumer. It eats fish which are the primary consumers.