Animals Feeding at Dusk and Dawn
Diurnal by definition means of or during the day. Animals that are diurnal are active during the day. Though times of activity of an animal are in relevance to the animal, as in it is to its advantage, it can act against it when this animal is a pet. Pets are usually diurnal, which is generally great for them since mostly humans are also diurnal, so their carers will have time for them, at least partially during the day. However, in the wild, diurnal animals have the advantage of, sometimes, direct sun exposure( for example turtles which use it for vitamin D3 synthesis) , and more importantly, a very good visibility. Animals that mainly rely on vision to hunt for food are usually diurnal. Diurnal prey have the advantage of easily spotting predators from a distance. Diurnal animals predominantly have colored and vivid vision.
Crepuscular means of Twilight. Crepuscular animals are active during twilight. Twilight is the illumination of the earth's lower atmosphere when the sun itself is not directly visible. Usually Crepuscular predators are active during twilight because their prey is active during that time, and they still have a decent amount of light to hunt and forage(guinea pigs). On the other hand, crepuscular prey can use this light to easily spot and avoid predators(rabbits). In addition to the that, in the wild, predators are generally least occurring during those times. This creates a state of a self regulating oscillating equilibrium. When a prey population increases due to their crepuscular habit, predators will have more food thus increasing their population , which in turn decreases the prey, then the predators decrease, increasing the prey, and so on. Being crepuscular serves them well as pets when their owners are rather busy during the day; the owners are unavailable when the pet itself is inactive. Below is a diagram to show the times and duration of a twilight. 
Nocturnal means done or active during the night. Nocturnal animals are usually more vulnerable to predation, so keeping active only during the night makes them somewhat "invisible"(mice). Nocturnal predators usually have a sensitive sight and/or do not rely on visible light to see(infrared vision). They can also have very well developed senses of smell and hearing.These animals are usually appropriate for pet owners who stay up late, and are ready to provide for them then. Usually you could only stay up late if you wake up late, which is quite a common trend. So a small number of these animals may prove to be surprisingly appropriate pets for some.
Matutinal means of or occurring in the morning. Matutinal organisms wake up before diurnal organisms so they have the advantage of consuming resources without competition. Matutinal animals are mostly bees, though lets just suppose a dog is Matutinal, then it'd be suitable for early wakers, who do not just wake up and rush to their job, but actually have time to care for them, at least briefly. Matutinal organisms become active during dawn, thus, they share active states with crepuscular animals at dawn.
Vespertine means relating or occurring in the evening. Vespertine organisms are similar to Nocturnal organisms. Both are awake at similar times so some share very close relations, as some nocturnal species are active in the evening but continue throughout the night. Vespertine organisms get to be active before most Nocturnal organisms so they can consume some resources before competition from the latter. Vespertine animals as pets are suitable for people who are unavailable during the day and return at early night. Vespertine organisms become active at dusk, thus, they share the active states with crepuscular animals at dusk.
vespertine and matutinal species are commonly considered as special cases of being crepuscular
Note: the existence of pets of these activity times were assumed, some maybe void of pets or at least a very minute amount of them are considered pets.
The bottom line is that us humans have the capability of being either of those, and based on what we are (what are lifestyles are) we choose our pets accordingly. Though this may seem like a cluster of vectors that cancel out, it's actually a very intricate and accurate cycle that keeps this planet going, but then humans come in...
Source: https://pets.stackexchange.com/questions/5806/diurnal-crepuscular-nocturnal-matutinal-vespertine-what-do-these-mean-and-h
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