Kenya

The Great migration happens is a mass movement of thousands and hundreds of wild beasts, zebras and impalas originating from Serengeti Tanzania headed into Masai Mara Kenya in search for fresh grass that sprouts in the Masai Mara National Reserve kenya
In the event of the river crossing and on the borders of Tanzania and Kenya, crocodiles and predators await to have their preys of very curious Wild beasts, impalas and zebras river crossing.
The wild beast migration happens between June and September when they cross back to Tanzania for the rest of the year.
This phenomenal experience of the wild attracts many travelers around the world and at this time of the year is sought to be the peak season of the year.

Yes, Apparently most tourists visiting Kenya require a Visa which is applied for in advance and online . Here is the official link for the application. https://evisa.go.ke/evisa.html

What to wear and what to bring depends on the Weather conditions or time of the year you travel. During the dry seasons opt for light clothing that are breathable when the Weather fluctuates from morning to evenings. Avoid black, dark blue or too white colors as these attract insects or Tsetseflys. The Comouflage colours are also outlawed in kenya so are a no go for packing. Casual wear is probably the best while shorts would be a game changer. Formal dressing is not necessary at all on a Kenya safari. Carry with you always insect repelant, sun screens, walking shoes, hats, shorts and a rain jacket just in case rain Surprises you.

The Big 5 Safari is the journey through Kenya’s Top destinations to watch the Big 5 Wildlife every traveler must see during the Kenya safari. The Big 5 safari includes in order The Elephants, The Rhinos, The Buffalos, The elusive leopards and the brave lion.
The Big 5 safari would take you through Masai Mara National Reserve or Samburu National reserve, Tsavo west and East National Park for extra ordinary encounters.

Kenya Boosts of the best African safari experience in East Africa. Masai Mara National Reserve is haven for a Kenya safari with chances of seeing the Big 5 like Elephants, Rhinos, Buffalos, Leoprads and Lions in Big Numbers. samburu National Reserve in the north of kenya boosts of the north special endemics like the Somali Orstrich, Grevy Zebras, Generuks, Besia oryx.

Amboseli National Park is heaven for the growing number of elephants within the national Park, The shadows of Kilimanjaro, a growing number of cheetahs, Hyenas and much more. The Tsavo west and Tsavo east are heaven for wildlife viewing and a popular place to see the Wilddogs and man eaters (Lions).

Nairobi national park, The chyulyu Hills and many conservancies like the Namunyak Conservancy in northern Kenya, Lewa and laikipia conservancy including solio are a success story for conservation of wildlife in Kenya