Cryptarithmetic Puzzles for 2023, Puzzle #22 BIRDS + BIRDS = FLOCK

The previous puzzle used the singular and was “easy”. This one BIRDS + BIRDS = FLOCK has more solutions, but I’d classify it as slightly harder than the previous one.

Enjoy! Solutions are below the image.

SPOILER SOLUTIONS!

BIRDS_first BIRDS_second FLOCK_third
13485 13485 26970
13548 13548 27096
13845 13845 27690
14538 14538 29076
14685 14685 29370
14835 14835 29670
14853 14853 29706
14865 14865 29730
15486 15486 30972
16485 16485 32970
18546 18546 37092
18645 18645 37290
20679 20679 41358
20769 20769 41538
20793 20793 41586
23079 23079 46158
26709 26709 53418
26907 26907 53814
27069 27069 54138
27093 27093 54186
27309 27309 54618
29067 29067 58134
29073 29073 58146
29307 29307 58614
30729 30729 61458
30792 30792 61584
30927 30927 61854
31485 31485 62970
32079 32079 64158
32709 32709 65418
32907 32907 65814
34851 34851 69702
35148 35148 70296
35481 35481 70962
38145 38145 76290
38451 38451 76902
45138 45138 90276
45186 45186 90372
45381 45381 90762
46185 46185 92370
46851 46851 93702
48135 48135 96270
48351 48351 96702
48513 48513 97026
48516 48516 97032
48531 48531 97062
48615 48615 97230
48651 48651 97302