List of Field Research tasks and rewards/2019

Please, note that there are always only either: specific amount of stardust, or XP, or just one kind of item, or a particular Pokémon encounter for a single task completed, which means only one of following possible rewards is rewarded for single Field Research task completed not all of them!

January to April 2019
Theme for Field Research tasks in January and February 2019 was not told specific in official sources. However, it was noticed that few Field Research tasks added that rewarded Trainers with Pokémon that are essential to catch to progress Let's Go, Meltan Special Research.

Field Research tasks in March and April 2019 were same as those in previous months, with the exception of Spinda #2 replacing #5. Shiny Mankey and Machop were available since March 5. Shiny Lapras was available since April 18.

Catching Pokémon related tasks
Following tasks were related to Catching Pokémon through the Encounter Screen. To complete any of following tasks, Trainer had to successfully capture Pokémon, which was either approached in the wild, from Raid Bonus Challenge or reward encounter for other, already completed Research task.

Throwing Poké Balls related tasks
Following tasks were related with performance of throwing any of Poké Balls when catching Pokémon.

Battle related tasks
Following tasks were related with battling a Gyms or Raid Battles.

Other tasks
Following tasks were related with Hatching Pokémon Eggs, evolving or power-upping Pokémon, earning Candy with Buddy and other basic game actions.

May to August 2019
An official e-mail confirmed new field research tasks available in May and June. Shiny Onix, Lileep and Anorith were available since June 4. Shiny Slakoth was available since June 8. Shiny Alolan Exeggutor was available since June 28. Shiny Poliwag was available since August 6.

Field Research tasks in July and August were same as those in previous months, with the exception of Spinda #8 replacing #4, and the release of its shiny version.

Catching Pokémon related tasks
Following tasks were related to Catching Pokémon through the Encounter Screen. To complete any of following tasks, Trainer had to successfully capture Pokémon, which was either approached in the wild, from Bonus Challenge or reward encounter for other, already completed Research task.

Throwing Poké Balls related tasks
Following tasks were related with performance of throwing any of Poké Balls when catching Pokémon.

Battle related tasks
Following tasks were related with battling a Gyms or Raid Battles.

Other tasks
Following tasks were related with Hatching Pokémon Eggs, evolving or power-upping Pokémon, earning Candy with Buddy and other basic game actions.

September to December 2019
Field Research tasks were changed on September, 2019.

Field Research tasks in November and December were same as those in previous months, with the exception of Spinda #1 replacing #3, and the release of its shiny version.

Catching Pokémon related tasks
Following tasks were related to Catching Pokémon through the Encounter Screen. To complete any of following tasks, Trainer had to successfully capture Pokémon, which was either approached in the wild, from Bonus Challenge or reward encounter for other, already completed Research task.

Throwing Poké Balls related tasks
Following tasks were related with performance of throwing any of Poké Balls when catching Pokémon.

Battle related tasks
Following tasks were related with battling in Gyms, Raid Battles or Trainer Battles.

Other tasks
Following tasks were related with Hatching Pokémon Eggs, evolving or power-upping Pokémon, earning Candy with Buddy and other basic game actions.

Event-only tasks
Following Field Research tasks were available during the certain events.

Limited Research tasks
In 2019, there were introduced 3-hour events called Limited Research during which players can obtain exclusive Field Research tasks that completing results with encounter of featured Pokémon.

Community Day tasks
Following is the list of research tasks exclusively available only for the time of specific Community Days.

Hoenn Celebration tasks
Following is the list of research tasks exclusively available only for the time of Hoenn Celebration 2019.

Lunar New Year tasks
Following is the list of research tasks exclusively available only for the time of Lunar New Year 2019.

Valentine's Day tasks
Following is the list of research tasks exclusively available only for the time of Valentine's Day 2019.

Pokémon Day tasks
Following is the list of research tasks exclusively available only for the time of Pokémon Day 2019.

Battle Showdown tasks
Following is the list of research tasks exclusively available only for the time of Battle Showdown 2019.

Equinox tasks
Following is the list of research tasks exclusively available only for the time of Equinox 2019.

Bug Out tasks
Following is the list of research tasks exclusively available only for the time of Bug Out event.

Eggstravaganza tasks
Following is the list of research tasks exclusively available only for the time of Eggstravaganza 2019.

Detective Pikachu Celebration tasks
Following is the list of research tasks exclusively available only for the time of Detective Pikachu Celebration event.

Extraordinary Raid Week tasks
Following is the list of research tasks exclusively available only for the time of Extraordinary Raid Week event.

Adventure Week tasks
Following is the list of research tasks exclusively available only for the time of Adventure Week 2019.

Pokémon GO Fest Dortmund tasks
Following is the list of research tasks exclusively available globally only for the time of Dortmund Pokémon GO Fest 2019.

Pokémon GO Fest Yokohama tasks
Following is the list of research tasks exclusively available globally only for the time of Yokohama Pokémon GO Fest 2019.

Water Festival tasks
Following is the list of research tasks exclusively available only for the time of Water Festival 2019.

World Tourism Day tasks
Following is the list of research tasks exclusively available only for the time of World Tourism Day.

Halloween tasks
Following is the list of research tasks exclusively available only for the time of Halloween 2019.

A Colossal Discovery tasks
Following is the list of research tasks exclusively available to the ticket holders only for the time of A Colossal Discovery.

Supereffective Week tasks
Following is the list of research tasks exclusively available only for the time of Supereffective Week.

Rocket Take-Over tasks
Following is the list of research tasks exclusively available only for the time of Rocket Take-Over on November, 2019.

Friend Fest tasks
Following is the list of research tasks exclusively available only for the time of Friend Fest.

Evolution Event tasks
Following is the list of research tasks exclusively available only for the time of Evolution Event.

Holiday tasks
Following is the list of research tasks exclusively available only for the time of Holiday 2019.